JP4799703B1 - Bonding structure of structure - Google Patents

Abstract

[PROBLEMS] To provide two structures (main structure and additional structure) that can behave independently of each other when a horizontal force is applied, such as an existing concrete structure and a new concrete structure constructed in contact therewith. ) Along with the relative rotational deformation between the two structures when joining to a state that allows relative rotational deformation around the horizontal rotational axis while transmitting the horizontal shear force between the two Avoid collision damage.
SOLUTION: A spanning direction of a main structure 1 on a spanning member 2 side of a main structure 1 in which a projecting member 2 projects outward in a span direction from a plane facing in the direction of the traversing direction. The additional structure 6 that transmits the horizontal shearing force is disposed and joined to the main structure 1. The connecting member 7 is extended from the lower position of the overhanging member 6 to the main structure 1 side of the additional structure 6, and the end of the connecting member 7 on the main structure 1 side is the main structure 1. Are joined so as to be capable of rotational deformation. The clearance which permits the relative rotational deformation | transformation with respect to the additional structure 6 of the extension member 2 is ensured between the extension member 2 and the additional structure 6, and between the extension member 2 and the connection member 7. FIG.
[Selection] Figure 1

Description

  The present invention includes, for example, an existing concrete structure and a new concrete structure constructed in contact with the structure, or a structure that is the main body of the structure and a structure that is additionally constructed in contact with the structure. The present invention relates to a joint structure in which a relative rotational deformation is allowed while transmitting a horizontal shear force between two structures that can behave independently of each other when a horizontal force is applied.

  For example, when constructing a new concrete structure in contact with the surface of one of the existing concrete structures, the new structure (additional structure) is mainly seismic resistant to the existing structure (main structure). Since it has a role to compensate for the property, it is joined to the existing structure (main structure) so that shear force is transmitted between the structures during an earthquake or the like (see Patent Documents 1 and 2).

  In particular, when the additional structure is a seismic (damping) reinforcement frame, the additional structure is parallel to the horizontal direction of the main structure with a small amount of seismic walls, and out of the main structure. The two structural bodies are joined to the main structural body so as to transmit a shearing force in the horizontal direction (parallel to the facing direction) perpendicular to the opposing direction (parallel to the opposing surface). The main body of a seismic (damping) reinforcement frame is mainly composed of column / beam frames and seismic elements such as braces incorporated in the frame.

  Here, for example, when a slab or the like such as a balcony projects from the surface of the additional structure side facing the direction of the main structure to the outside in the span direction (additional structure side), the additional structure side of the main structure If the main body (frame) of the additional structure cannot be built close to the surface of the structure, a distance is placed between the surface of the additional structure and the surface of the main structure.

  Therefore, when the additional structure is integrated with the main structure, the main body of the additional structure projects a slab, a beam, or the like that can secure the overhang length while transmitting the shearing force in the beam direction. Therefore, a slab or the like is bonded to the surface of any part (housing) of the main structure (see Patent Documents 2 and 3).

  On the other hand, in joining the slab of the additional structure to the main structure so that the horizontal shear force can be transmitted, the slab of the additional structure is joined to a portion of the main structure housing having a high rigidity. Therefore, it is appropriate that the main structure is joined to a beam (girder) facing the direction of shearing force action (girder direction) (see Patent Documents 2 and 3).

Japanese Patent No. 4038472 (paragraphs 0067 and 0080, FIGS. 11 and 12) Japanese Patent No. 4230533 (paragraphs 0081 to 0083, FIGS. 6 and 7) Japanese Patent No. 4628491 (paragraphs 0065 to 0093, FIGS. 2 to 5)

  While the additional structure is joined to the main structure, the additional structure (new structure) and the main structure (old structure), for example, when a horizontal force is applied due to differences in bending rigidity (natural frequency), etc. Are acting independently in the mutually opposing directions (span direction), the additional structure is forcibly deformed so as to follow (drag) the deformation of the main structure.

  The deformation of the additional structure by following the deformation of the main structure occurs when the main structure is bent and deformed in the opposite direction (span direction) as a whole, and follows the bending deformation of the main structure. Since the deformation of the additional structure to be turned becomes a relative rotational deformation with respect to the main structure, the relative rotational deformation between the two structures is a direction orthogonal to the direction in which the main structure and the additional structure face each other (span direction). Occurs around a horizontal axis parallel to the column direction.

  Therefore, as in Patent Document 3, the main structure and the additional structure are joined in a state in which relative rotational deformation around the horizontal axis parallel to the direction orthogonal to the direction in which both face each other (the row direction) is allowed. There is a need. If rotational deformation is not allowed, the joint between both structures will be damaged.

  However, as shown in FIGS. 2 and 10 in Patent Document 1 and FIGS. 6 and 7 in Patent Document 2, the slab of the existing structure (main structure) and the slab of the new structure (additional structure) are mutually connected. If they are joined in an overlapping state, the bending deformation that would occur in the slab of the existing structure is constrained (blocked) by the slab of the new structure, so the relative rotation between the two structures Deformation is hindered, and both slabs and the like may be damaged. Damage due to contact between both slabs or the like is likely to occur when the slab or the like of the new structure is joined to the casing of the existing structure so as to be capable of relative rotation as in Patent Document 3.

  Based on the above, for the purpose of seismic reinforcement of the main structure where the slab and other overhanging members are projecting to the additional structure side, the additional structure is constructed on the overhanging member side of the main structure. When projecting a connecting member such as a slab for joining to the main structure, the main structure and the additional structure are around the horizontal axis parallel to the in-plane direction (column direction) as in Patent Document 3. Even if they are joined in a state where their rotational deformation is allowed, both slabs and the like may collide with each other, and at least one of them may be damaged.

  This invention allows relative rotational deformation between the main structure and the additional structure while transmitting the horizontal shearing force between the main structure and the additional structure by a connecting member such as a slab protruding from the additional structure to the main structure side. The present invention proposes a joint structure that avoids damage to both structures when both structures are joined to each other.

The structure joining structure according to the first aspect of the present invention has the above-described structure on the projecting member side in the span direction of the main structure in which the projecting member projects outwardly in the span direction from the structure surface facing the beam direction. Bonding of a structure in which an additional structure that shares a part of the external force borne by the main structure and transmits the horizontal shearing force in the direction of the beam to and from the main structure is arranged and joined to the main structure Structure,
From the additional structure , a connecting member located below the projecting member projects to the main structure side ,
The end of the connecting member on the main structure side is joined to the main structure in a state in which the main structure can be rotationally deformed around the horizontal axis in the row direction when the main structure is bent and deformed in the span direction.
The additional structure of the extension member when the main structure is bent in the span direction between the extension member and the additional structure and between the extension member and the connecting member. It is a constituent requirement that a clearance that allows relative rotational deformation with respect to the body is secured.

  “The projecting member projects outward in the span direction from the structural surface facing the column direction of the main structure” means that the main structure has a structural surface facing the column direction and facing the span direction. This means that a projecting member such as a slab or ridge of a balcony projects from at least one of the structural surfaces to the outdoor side, and the present invention corresponds to a main structure in the case of an existing structure. States that. Since “additional structure is disposed on the surface of the projecting member”, the additional structure is disposed on the outdoor side of the main structure projecting from the projecting member. The “span direction of the main structure” is the direction in which the main structure and the additional structure face each other, and the “running direction of the main structure” is orthogonal to the direction in which the main structure and the additional structure face each other (span direction). Horizontal direction. The “composition surface” facing the column direction is mainly composed of a frame of columns and beams.

“The connecting member located below the overhanging member projects from the additional structure to the main structure side ,” means that the slab (floor), flat beam, etc. This means that the connecting member projects from the additional structure to the main structure. By joining the end of the connecting member on the main structure side to the main structure, the connecting member can transmit a horizontal shearing force between both structures in a direction orthogonal to the direction in which both structures face each other. This means that the horizontal force in the column direction that one structure should bear is shared by both structures.

  The connecting member is continuously joined in the direction of the main structure to the main structure, such as a beam (girder) of the main structure, so that the horizontal shearing force in the direction of the main structure is transmitted to the main structure. Therefore, it is appropriate that a slab having a continuous length in the column direction is used as the connecting member. However, if the connecting member has a certain continuous length in the row direction of the main structure, it can perform the function of horizontal shearing force transmission, so it does not necessarily have to be continuous in the row direction and may be arranged intermittently. is there. In the case where the connecting member is continuously joined to one of the main structural bodies, the joining member is joined to the column in addition to the beam (girder).

  As described above, when a protruding member such as a slab of a balcony protrudes on the additional structure side of the main structure, a beam (girder) of the main structure to which a connecting member such as a slab of the additional structure is to be joined As long as is not a reverse beam, the slab (connecting member) of the additional structure cannot be disposed on the slab (projecting member) of the main structure. Even when the waist wall stands up from the tip of the slab of the main structure, the slab of the additional structure cannot be disposed on the slab of the main structure. In this regard, in the present invention, the connecting member is disposed below the projecting member, so that the connecting member such as the slab can be used as a beam of the main structure while avoiding contact (collision) or interference with the projecting member. It is possible to join any one of the housings.

  “The end of the connecting member on the main structure side is joined to the main structure so as to be rotatable and deformable with respect to the main structure” means that the connecting member faces the main structure and the additional structure (span direction) ) Is joined to the main structure in a state in which it can be rotationally deformed about an axis (horizontal axis) in the horizontal direction (column direction) orthogonal to (). The connecting member extends from the main structure and is laid between the main structure and the additional structure, but is joined to the main structure so as to be capable of rotational deformation, so that the two structures are orthogonal to each other. The bending moment around the horizontal axis in the direction is not transmitted, and relative rotational deformation (bending deformation) between both structures is allowed.

The joint state of the connecting member to the main structure is described. “The end of the connecting member on the main structure side turns into the main structure, and when the main structure is bent in the span direction, it rotates around the horizontal axis in the direction of the beam. “The joint is in a state in which deformation is possible ,” means that the connecting member is in a state in which relative rotational deformation is possible around the horizontal axis in the direction (row direction) perpendicular to the direction in which both structures face each other (span direction). Joining to a structure means that the connecting member and the main structure are substantially pin-joined in the span direction (around the horizontal axis in the column direction). This is also “when the main structure is bent in the span direction, the connecting member is rotationally deformed with respect to the main structure in the direction opposite to the direction of the bending deformation”. “Bending deformation of the main structure in the span direction” means that the main structure is bent and deformed in the direction (span direction) facing the additional structure as a whole as shown in FIG. May be accompanied by shear deformation as shown in FIG. The main structure undergoes bending deformation as a whole, thereby causing interlayer deformation (interlayer deformation angle θ) during bending deformation.

  The connecting member protruding from the additional structure is joined to the main structure so as to be capable of relative rotational deformation about the horizontal axis, thereby causing the additional structure to undergo relative rotational deformation with respect to the main structure. Although it is possible, “the connecting member is substantially pin-joined to the main structure while transmitting the horizontal shearing force between the main structure” and, for example, as described below, the connecting member and the main structure This is realized by being joined via a “fixing device 8” that is interposed therebetween.

At the time of bending deformation of the main structure in the span direction, the connecting member is rotational deformation around the horizontal axis in the direction of the beam, so that when the bending deformation of the main structure 1 in the span direction occurs, the connecting member 7 becomes the main structure. By causing relative rotational deformation to 1, the main structure 1 moves relative to the additional structure 6 in a direction approaching the additional structure 6 as shown in FIGS . The relative movement toward the main structure 1 and the relative movement away from the main structure 1 are alternately repeated. FIG. 5- (a) shows a state in which a part of FIG. 4- (a) is enlarged.

  The connecting member 7 is added to the main structure 1 at the time of bending deformation in the span direction of the main structure 1 by rotating and deforming relative to the main structure 1 around the horizontal axis in the row direction. As shown in FIGS. 5A and 5B, the structure 6 is in a state in which it can be rotationally deformed (bending) with respect to the main structure 1 in the direction opposite to the bending deformation of the main structure 1. FIG. 4B shows a state in which the main structure 1 undergoes shear deformation as a whole and the additional structure 6 also undergoes shear deformation following the main structure 1. The body 6 may exhibit this deformation property.

  When the connecting member 7 undergoes relative rotational deformation with respect to the main structure 1, it does not matter whether the additional structure 6 is bent or sheared as a whole, but FIG. When the main structure 1 is subjected to bending deformation as a whole while accompanying shear deformation, the additional structure 6 undergoes shear deformation as a whole, and the connecting member 7 is translated from the state before deformation of the additional structure 6. It shows a state. When the main structure 1 is bent and deformed in a direction approaching the additional structure 6, the connecting member 7 follows the deformation of the main structure 1 by rotating and deforming relative to the main structure 1. An attempt is made to maintain the distance between the body 1 and the additional structure 6.

  The bending deformation of the additional structure 6 as shown in FIGS. 5A and 5B is a section unit in which the pillar 6a constituting the additional structure 6 includes a joint portion with the beam 6b in the height direction as will be described later. This is likely to occur when a seismic isolation device 6e such as a laminated rubber bearing that connects the columns 6a, 6a adjacent in the height direction so as to be relatively movable in the horizontal direction is interposed at the divided positions. In particular, a remarkable tendency is exhibited when the columns 6a and 6a that are divided vertically with the seismic isolation device 6e interposed therebetween are connected so as to be able to rotate and deform with each other via a connecting member having a spherical bottom surface.

  The state shown in FIG. 4A is related to the bending deformation of the main structure 1 as a result of “the joining member 7 being joined to the main structure 1 in a state in which the connecting member 7 can be rotationally deformed with respect to the main structure 1”. Instead, the additional structure 6 as a whole undergoes shear deformation or bending deformation, thereby showing that the connecting member 7 is substantially translated from the state before the deformation. At this time, as shown in FIG. 5- (a), the connecting member 7 is rotationally deformed with respect to the main structure 1, whereby the center line on the longitudinal section of the connecting member 7, the column 4 of the main structure 1, etc. The angle formed with the axis of the vertical material is relatively small. In FIG. 5, the solid line shows the state after deformation, and the alternate long and short dash line shows the state before deformation.

  Since the overhang member 2 is a part of the main structure 1, it is substantially rigidly joined to or close to the main structure 1. From this position, it moves relative to the same side as the main structure 1 while following it. For example, when the main structure 1 undergoes bending deformation in a direction approaching the additional structure 6, the projecting member 2 connected to the main structure 1 is added to the additional structure 6 as shown in FIG. When the main structure 1 undergoes bending deformation in a direction away from the additional structure 6 so that the side is lowered, the projecting member 1 rotates so that the additional structure 6 side is raised. At any time, the connecting member 7 that follows the main structure 1 tries to move in a state parallel to or near the state before the deformation by the relative rotation with respect to the main structure 1.

  When the connecting member 7 is joined to the main structure 1 so as to be capable of relative rotational deformation about the horizontal axis, when the main structure 1 undergoes bending deformation in a direction approaching the additional structure 6 side, the connecting member 7 is connected. As shown in FIG. 5A, the member 7 is bent and deformed while rotating and deforming relative to the main structure 1 in a direction in which the angle formed with the pillar 4 of the main structure 1 becomes smaller. Follow 1

  At this time, since the column 4 near the additional structure 6 of the main structure 1 is on the compression side, it is bent and deformed as shown in FIG. The level of the joint portion is relatively lowered from the state before the deformation. Accordingly, the level of the joint portion of the connecting member 7 that is pin-joined to the column 4 (beam 3) and the column 4 (beam 3) is lowered from the state before the deformation, as shown in FIG. Apparently, the joint portion of the connecting member 7 with the additional structure 6 (column 6a (beam 6b)) tends to rise relatively. For this reason, from the state before the deformation, the distance from the tip of the extension member 2 on the additional structure 6 side to the additional structure 6 (column 6a (beam 6b)) and the distance to the connecting member 7 are small. Become.

  Here, when the main structure 1 is bent and deformed in the direction of approaching the additional structure 6, and the tip of the projecting member 2 is lowered from before the deformation, the connecting member 7 is disposed below the projecting member 2. Thus, as described above, the connecting member 7 that moves relative to the column 6a so that the junction with the column 6a rises from the junction with the column 4 from the state before deformation, or the body of the additional structure 6 (either There is a possibility that the tip of the overhanging member 2 may collide with the portion. Simple contact that does not cause damage to both the overhanging member 2 and the connecting member 7 does not lead to a collision, and is allowed.

  In response to the possibility of the collision, the present invention “bend deformation of the main structure 1 in the span direction between the projecting member 2 and the additional structure 6 and between the projecting member 2 and the connecting member 7. The clearance of allowing the relative rotation deformation of the extension member 2 relative to the additional structure 7 at the time is ensured ", so that the extension member of the main structure 1 that has been bent and deformed toward the additional structure 6 side. 2 is prevented from colliding with the additional structure 6 and the connecting member 7. The “clearance Hc between the extension member 2 and the additional structure 6” is ensured in the horizontal direction between the tip of the extension member 2 on the additional structure 6 side and any part of the additional structure 6. The “clearance Vc between the overhang member 2 and the connecting member 7” is ensured in the vertical direction between the lower surface (lower end) of the overhang member 2 and the upper surface (upper end) of the connecting member 7.

  “The clearance that allows relative deformation of the extension member relative to the additional structure during bending deformation in the span direction of the main structure is ensured” means that the tension connected to the main structure 1 When the output member 2 undergoes relative rotational deformation between the additional structure 6 and the connecting member 7 due to the bending deformation of the main structure 1, it does not collide with both the additional structure 6 and the connecting member 7. Only the clearances Hc and Vc are secured between them. “Allowing rotational deformation” means that the overhang member 2 has an additional structure at the time of bending deformation in the span direction or shear deformation of the main structure 1 as shown in FIG. 4- (a) or (b). Says not colliding with any part of body 6. The clearance between the projecting member 2 and the additional structure 6 indicates the horizontal distance Hc between the two shown in FIG. 5A, and the clearance between the projecting member 2 and the connecting member 7 is between the two. The vertical interval Vc.

  When the main structure 1 undergoes bending deformation in a direction approaching the additional structure 6, the end of the connecting member 7 on the main structure 1 side is capable of rotational deformation relative to the main structure 1. As shown in FIG. 5- (a), the connecting member 7 tries to make a relative displacement in the opposite direction to the overhanging member 2, and as a result of this opposite displacement, the additional structure 6 Any part of the column 6a, the beam 6b, the brace 6c, etc., which is the main body, approaches the tip of the overhang member 2, and the upper surface of the connecting member 7 approaches the lower surface of the overhang member 2. In order to avoid a collision at this time, between the tip of the extension member 2 on the side of the additional structure 6 and the main body of the additional structure 6, and the lower surface of the side of the tip of the extension member 2 and the upper surface of the connecting member 7 Clearances Hc and Vc are secured between the two.

  The larger the horizontal clearance Hc between the overhanging member 2 and the additional structure 6 and the vertical clearance Vc between the overhanging member 2 and the connecting member 7, the lower the possibility of each collision. . However, if the horizontal clearance Hc between the projecting member 2 and the additional structure 6 is increased, the distance between the main structure 1 and the additional structure 6 is increased, and the projecting length of the connecting member 7 is increased. Therefore, the in-plane bending moment received by the connecting member 7 when the horizontal shear force is transmitted is disadvantageously increased.

  Further, if the vertical clearance Vc between the projecting member 2 and the connecting member 7 is increased, the vertical cross section of the beam (girder) 3 etc. to which the connecting member 7 is joined to the center of the connecting member 7 on the vertical cross section. There is a possibility that the eccentricity between the center and the center of the beam increases, and the eccentric distance appears as an influence of a bending moment or a torsional moment when the horizontal shearing force is transmitted between the connecting member 7 and the beam 3 (main structure 1). is there. If the clearance Vc in the vertical direction is to be increased, it may be difficult to bring the entire cross section of the connecting member 7 into contact with the side surface of the beam 3 within the range of the beam.

  For example, while ensuring a sufficiently large vertical clearance Vc between the overhang member 2 and the connecting member 7, the end of the connecting member 7 on the main structure 1 side is connected to the beam 3 of the main structure 1. If it is going to join within the range of composition, it is assumed that the thickness of connecting member 7 must be reduced. For example, if the clearance Vc is to be secured while the lower surface (lower end) of the connecting member 7 is aligned with the lower end of the beam 3 of the main structure 1, the center of the connecting member 7 on the vertical section is below the center of the beam 3. The torsional moment is easily applied to the beam 3 by the axial force that is located and acts in the span direction of the connecting member 7.

  From the above, the horizontal clearance Hc and the vertical clearance Vc alleviate the burden of the connecting member 7 when transmitting the shearing force, and at the same time, transmit the shearing force of the connecting member 7 and the main structure 1 located on both sides thereof. In constructing the connecting member 7 with a reasonable size without causing unnecessary stress on the beam 3 and the beam 6b of the additional structure 6, it is desirable to keep it as small as possible.

Therefore, the lower surface of the connecting member 7 is located at the same level as or higher than the lower surface (lower end) of the beam 3 constituting the surface of the main structure 1 on the projecting member 2 side ( above the lower surface (lower end) of the beam 3) . If the connecting member 7 is arranged so that the upper surface of the connecting member 7 is located at the same level as or higher than the center of the cross section of the beam 3 (more than the center of the cross section of the beam 3) (Claim 2). Since extreme eccentricity between the center on the cross section of the connecting member 7 and the center on the cross section of the beam 3 is avoided, at least the action of the torsional moment from the connecting member 7 to the beam 3 is reduced or the influence is minimized. It becomes possible to suppress to. “More than” of “below the lower surface (lower end) of the beam 3” indicates the same level and above. 1, 2, 6, 7, and 13, the intersection of the diagonal lines indicating the cross section of the beam 3 represents the center (centroid) on the cross section of the beam 3.

  If the lower surface of the connecting member 7 is positioned above the lower surface of the beam 3 constituting the surface of the main structure 1 on the projecting member 2 side, and the upper surface of the connecting member 7 is positioned above the center of the cross section of the beam 3 Since the horizontal line passing through the center on the cross section of the connecting member 7 can be stored in a certain region including the center on the cross section of the beam 3, the horizontal line passing through the center on the cross section of the connecting member 7 is set on the cross section of the beam 3. It is also possible to completely eliminate the eccentricity by matching with the center of the center. The lower surface of the connecting member 7 is located below the center on the cross section of the beam 3 and the upper surface of the connecting member 7 is a cross section of the beam 3 as shown in FIG. 1, FIG. 2, FIG. If it is positioned above the upper center, the horizontal line passing through the center on the cross section of the connecting member 7 is likely to be within a certain region including the center on the cross section of the beam 3.

  As shown in FIG. 4- (a) and FIG. 5- (a), when the main structure 1 is bent and deformed, “the amount of descent from the deformation (original position)” of the projecting member 2 is larger in the upper layer, The amount of vertical relative displacement V1 between the connecting member 7 and the connecting member 7 differs depending on the degree of bending deformation (property) of the main structure 1 and the number of layers (floors). The clearance Hc between the projecting member 2 and the clearance Vc between the projecting member 2 and the connecting member 7 is determined according to the floor (layer) of the main structure 1 projecting from the projecting member 2.

  The “clearance that does not allow the overhang member to collide with the additional structure and the connecting member” is between the end (tip) of the overhang member 2 on the side of the additional structure 6 and the additional structure 6, and the overhang member 2 It is ensured between the lower end of the end portion (tip portion) on the additional structure 6 side and the upper surface (top end surface) of the connecting member 7. In both clearances, basically, the overhang length L0 of the overhang member 2 shown in FIG. 5A from the main structure 1, the interlayer deformation angle θ assumed when the main structure 1 is bent, and the main It is determined by the distance (floor height) V between the layers of the structure 1. The interlayer deformation angle θ is determined according to the property of bending deformation that occurs in the main structure 1.

  In FIG. 5A, the main structure 1 is shown as a vertical member (column 4) obtained by bending deformation, and the additional structure 6 is shown as a vertical member (column 6a) obtained by shear deformation. It is shown as being rigidly joined to the vertical member (column 4) and the connecting member 7 being rigidly joined to the vertical member (column 6a) of the additional structure 6. The connecting member 7 is pin-connected to the main structure 1 (column 4) so as to be rotatable.

  FIG. 5B is a comparison with FIG. 5A, and the additional structure 6 of the connecting member 7 when the vertical member (column 6a) of the additional structure 6 is bent and deformed to the main structure 1 side. The state after the bending deformation of the additional structure 6 in the case where the fluctuation in the level of the joint with the (column 6a) is small (not changed) is shown.

  FIG. 5- (a) shows a state after deformation when the level of the joint portion between the deformed connecting member 7 and the column 6a (beam 6b) is relatively higher than the level before deformation. (B) has shown the mode after a deformation | transformation in case the level of a junction part with the pillar 6a (beam 6b) of the connecting member 7 after a deformation | transformation does not change with the level before a deformation | transformation. Whether the level of the joint portion between the connecting member 7 and the column 6a is higher than that before deformation as shown in (a), or whether there is no fluctuation as shown in (b). It differs depending on the deformation properties of the additional structure 6 that is bent or sheared following the deformation.

  In FIG. 5- (a), when the main structure 1 is bent and deformed toward the additional structure 6, the interlayer deformation angle is θ, and the projecting length of the projecting member 2 from the main structure 1 is L0. The relative horizontal displacement amount H1 toward the additional structure 6 due to only the bending deformation of the main structure 1 at the projecting position of the projecting member 2 (joint position with the column 4) is H1 = V · tan θ. Since the distance L1 from the joining position to the main structure 1 at the distal end position of the projecting member 2 after deformation is L1 = L0 · cos θ, the distal end position of the projecting member 2 after deformation is rotated from the state before deformation. The relative horizontal displacement amount H2 due to deformation is H2 = H1 + L1-L0 = V.tan.theta. + L0.cos .theta.-L0 = V.tan .theta.-L0. (1-cos .theta.).

  The relative horizontal displacement amount H2 due to the rotational deformation at the distal end position of the overhang member 2 is the relative horizontal displacement amount from the state before the main structure 1 is bent and deformed until the deformation. On the other hand, the relative vertical displacement amount V1 at the distal end position of the projecting member 2 after deformation is V1 = L0 · sin θ. Since the relative vertical displacement amount of the joint position of the projecting member 2 with the main structure 1 (column 4) due to only bending deformation of the main structure 1 is minute, it can be ignored.

  Thus, the relative horizontal displacement amount H2 and relative vertical displacement amount V1 of the tip position of the projecting member 2 after deformation are the projecting length L0 of the projecting member 2, the interlayer deformation angle θ, and the interlayer distance (floor height) V. Therefore, from these conditions, the horizontal clearance Hc to be secured between the end (tip) of the extension member 2 on the additional structure 6 side and the additional structure 6 and the addition of the extension member 2 are determined. The size of the vertical clearance Vc to be ensured between the lower end of the end portion (front end) on the structure 6 side and the upper surface (top end surface) of the connecting member 7 is obtained.

  The horizontal clearance Hc is set to a relative horizontal displacement amount H2 or more (Hc ≧ H2 = V · tan θ−L0 · (1−cos θ)) at the tip end position of the overhang member 2, and the vertical clearance Vc is set to the overhang member 2. The relative vertical displacement amount V1 or more (Vc ≧ V1 = L0 · sin θ) of the tip position is set. The reason for including an equal sign is to allow contact between the overhang member 2 and the connecting member 7.

  In the example of FIGS. 1 and 2 showing the actual (implementation design), it has been confirmed that both the horizontal clearance Hc and the vertical clearance Vc should be at least about 20 to 30 mm. In FIGS. 1 and 2, the horizontal clearance Hc and the vertical clearance Vc are set to be approximately equal. However, when both clearances Hc and Vc can be set equal, the size of both clearances Hc and Vc is minimized. It corresponds to.

The clearance (horizontal clearance Hc) to be secured between the end (tip) of the extension member 2 on the additional structure 6 side and the additional structure 6 is described in detail in “Additional structure of main structure 1”. The additional structure 6 side of the projecting member 2 when the connecting member 7 following the main structure 1 is rotationally deformed with respect to the main structure 1 around the horizontal axis in the direction of the beam during bending deformation to the 6 side. The distance on the additional structure 6 side of the projecting member 2 separates this distance from the additional structure 6 (Claim 3). The “relative horizontal movement amount of the protruding member 2 toward the additional structure 6” here corresponds to the “relative horizontal displacement amount H2 of the distal end position of the protruding member 2”.

The clearance (vertical clearance Vc) to be secured between the lower end of the end portion (tip portion) of the extension member 2 on the additional structure 6 side and the upper surface (top end surface) of the connecting member 7 is “main structure”. Of the projecting member 2 when the connecting member 7 that follows the main structure 1 is rotationally deformed with respect to the main structure 1 around the horizontal axis in the direction of the crossing when the one is bent and deformed toward the additional structure 6 side. The distance is equal to or greater than the amount of relative vertical movement to the additional structure 6 side, and the end of the extension member 2 on the additional structure 6 side separates this distance from the connecting member 7 of the additional structure 6 (Claim 4). . The “relative vertical movement amount of the protruding member 2 toward the additional structure 6” here corresponds to the “relative vertical displacement amount V1 of the distal end position of the protruding member 2”.

  In the state where the extension member (slab) of the main structure (existing structure) and the connecting member (slab) of the additional structure (new structure) are in contact with each other as in Patent Documents 1 and 2 described above, When the connecting member is joined to the main structure, both slabs may be damaged at the time of relative rotational deformation between the two structures. The damage of the slab due to maintaining the contact state is such that the connecting member (slab of the new structure) is joined to the main structure (existing structure) in a state where relative rotation is possible as in Patent Document 3. More likely to occur.

  The connecting member of Patent Document 3 is joined to the main structure in a state that allows relative rotational deformation about a horizontal axis orthogonal to the direction in which both structures face each other. Relative rotational deformation occurs when the main structure, which is at least one of the structures, bends and deforms in an opposing direction with respect to the additional structure, as shown in FIGS. 4- (a) and (b). This also occurs when the main structure undergoes bending deformation or shear deformation, and the additional structure undergoes shear deformation. In Patent Document 3, the collision between the projecting member and the connecting member is likely to occur, for example, when the main structure is bent and deformed so that the distance between the additional structure and the additional structure approaches, and both the main structure and the additional structure are mutually connected. It becomes prominent when it is bent and deformed in the approaching direction.

  In contrast, according to the present invention, the tension between the projecting member 2 and the additional structure 6 and between the projecting member 2 and the connecting member 7 during bending deformation of the main structure 1 in the span direction. The clearance that allows relative rotation deformation of the protruding member 2 with respect to the additional structure 6 is secured "(Claim 1), and the overhanging member 2 and the connecting member 7 are in contact (maintaining the contact state). In this case, damage at the time of relative rotational deformation between the structures 1 and 6 is avoided.

  In particular, in claim 3, “there is a clearance that is equal to or greater than the amount of relative horizontal movement of the projecting member 2 toward the additional structure 6 due to bending deformation of the main structure 1”. The bending structure similar to that of the main structure 1 does not occur, the level of the connecting member 7 does not change, and the additional structure 6 of the protruding member 2 also when the protruding member 2 approaches the additional structure 6 side. Collisions are avoided. In claim 4, the additional structure of the overhang member 2 is ensured by “a clearance that is equal to or greater than the amount of relative vertical movement of the overhang member 2 toward the additional structure 6 associated with the bending deformation of the main structure 1”. Even when the tip on the body 6 side is lowered, the collision of the projecting member 2 with the connecting member 7 is avoided.

  For the main structure and the additional structure to behave independently of each other when a horizontal force is applied, for example, there is a difference in the bending rigidity between the main structure and the additional structure, and the difference in natural frequency due to the difference in bending rigidity. Due to the independent behavior (vibration) and bending deformation, there is no difference in bending rigidity and relative bending at the joint of the main structure and additional structure while bending deformation is uniform. Deformation may occur. In either case, the relative rotational deformation between the main structure and the additional structure occurs when at least one of the structures undergoes bending deformation.

  For example, when two structures with the same bending rigidity are adjacent to each other, if both structures are bent and deformed uniformly, both structures are bent and deformed even between parts located at the same level in the state before the deformation. Because of this, a level difference (step) is generated, so that relative rotational deformation occurs even when there is no difference in bending rigidity between the two structures.

  While the horizontal shearing force (horizontal shearing force) is transmitted between the main structure 1 and the additional structure 6, both the structures 1 and 6 are joined to each other so as to be able to rotate around the axis in that direction. 1, 2, and 6, the fixing device 8 described above is arranged across the surface of the main body 1 (the beam 3 and the like) and the connecting member 7 of the additional structure 6. Is ensured by

  As shown in FIG. 6, the fixing device 8 is located at the boundary between any frame that forms the surface of the additional structure 6, such as the beam (girder) 3 of the main structure 1, and the connecting member 7 of the additional structure 6. The fixing member 9 has an insertion hole 92a that is disposed across and partially penetrates in the thickness direction, and an anchor 10 that penetrates the fixing member 9 and is fixed to both structures 1 and 6 and bendable. . The fixing device 8 has a function of transmitting a horizontal shear force between the main structure 1 and the additional structure 6, and its direction (direction orthogonal to the direction in which the main structure 1 and the additional structure 6 face each other). ) Are arranged in large numbers.

  The fixing member 9 is installed across the main structure 1 and the connecting member 7. The fixing unit 91 is fixed to one of the main structure 1 and the connecting member 7, and the main body is connected to the other and fixed to the other. The main body portion 92 opposite to the fixing portion 91 is convex in the axial direction as a whole. A fixing portion 91, which is an end portion on one side in a direction in which both structures 1 and 6 face each other (an axial direction of the fixing member 9), is fixed to one of the main structure 1 and the connecting member 7, and the other end. The main body portion 92 which is a portion is fixed to either the main structure 1 or the connecting member 7.

  The fixing unit 91 is formed (projected) continuously or intermittently in the circumferential direction around the main body 92 or at a position close to the periphery, and is formed in an annular shape as a whole. When any portion of the fixing unit 91 bears a shearing force, the fixing unit 91 is continuously formed to distribute the load throughout the fixing unit 91. “Intermittently formed” means that the depth of the fixing portion 91 changes in the circumferential direction as in the case where the fixing portion 91 is formed in a wave shape.

  As shown in FIG. 11, the fixing member 9 and the main body 92 are fixed to the structures on the respective sides, so that one structure (the main structure 1 in the illustrated case) and the other are fixed in the event of an earthquake. Both contact surfaces (boundary surfaces) of the structure (in the illustrated case, the connecting member 7 of the additional structure 6) are parallel to the contact surfaces (surfaces where both structures 1 and 6 face each other) in a parallel state. When a horizontal relative displacement (displacement deformation) is about to occur, a horizontal shearing force between both structures (the additional structure 6 and the main structure 1) is transmitted.

  The fixing member 9 is fixed (embedded) in one structure (main structure 1) in the fixing portion 91, and fixed (embedded) in the other structure (the connecting member 7 of the additional structure 6) in the main body 92. Accordingly, the horizontal shearing force received from the other structural body 6 (the connecting member 7) is transmitted to the one structural body 1, or conversely, the horizontal shearing force received from the one structural body 1 is transmitted to the other structural body 6 (the connecting member). 7). As shown in FIG. 11- (a), the fixing portion 91 is inserted into (inserted into) the groove portion 1b formed on the surface of the one structure 1 on the other structure 6 (connecting member 7) side. Fixed to the body 1.

  At the boundary surface between one structure 1 and the other structure 6 (the connecting member 7), relative displacement (displacement deformation) is likely to occur while both contact surfaces remain parallel during an earthquake as described above. Therefore, the fixing member 9 tends to receive a horizontal shearing force from the one structure 1 and the other structure 6 (the connecting member 7) at the time of relative displacement. A section (part) in which the main body 92 of the fixing member 9 receives a shearing force from the other structure 6 (the connecting member 7) and is embedded in one structure 1 that is at least a part of the fixing portion 91 in the axial direction. Transmits the shearing force from the other structure 6 (the connecting member 7) to one structure 1, and bears the reaction force.

  Regardless of the position and shape of the fixing portion 91 formed continuously with the main body portion 92 with respect to the main body portion 92, the annular fixing portion 91 fitted into the groove portion 1 b of one structure 1 is formed on the outer periphery of the main body portion 92. In addition, it is formed at a position closer to the inside than the outer periphery of the main body 92. In the former case, the outer peripheral surface of the fixing unit 91 is continuous with the outer peripheral surface of the main body 92, and in the latter case, the outer peripheral surface of the fixing unit 91 is located on the inner peripheral side of the outer peripheral surface of the main body 92.

  The fixing portion 91 is fitted over the entire circumference in the groove portion 1b of one structure 1 formed in an annular shape or a planar shape corresponding to the shape. There are cases where the entire fixing portion 91 is inserted in the depth direction (axial direction) of the groove portion 1b and a part of the section is inserted. A plurality of fixing portions 91 may be formed concentrically in the radial direction (radial direction) of the main body portion 92.

  When the entire fixing portion 91 (the entire depth direction (axial direction)) is fitted into the groove 1b of one structure 1, the outer peripheral surface of the main body 92 contacts the other structure 6 (the connecting member 7). To do. When a partial section of the fixing unit 91 is fitted into the groove 1b, the outer peripheral surface of the main body 92 and a part of the fixing unit 91 are in contact with the other structure 6 (the connecting member 7). In any case, as shown in FIG. 11, the outer peripheral surface of the main body 92 bears a shearing force from the other structure 6 (the connecting member 7), and one structure is formed from the outer peripheral surface and the inner peripheral surface of the fixing unit 91. A shear force is transmitted to the body 1.

  11A and 11B, when a rightward shearing force is applied to the fixing member 9 from the other structural body 6 (the connecting member 7), the shearing force is opposite to the direction of the fixing. The outer peripheral surface of the main body 92 of the member 9 is received. The shearing force from the other structure 6 (the connecting member 7) is received by the projected area in the shearing force acting direction in the outer peripheral surface of the main body 92. In FIG. 11- (a) and (b), the surface which receives a shear force is shown by the thick line.

  The shearing force received by the outer peripheral surface of the main body 92 is directed to the side facing the outer peripheral surface, and the outer peripheral surface and inner peripheral surface of the fixing unit 91 fitted into the groove portion 1b of the one structural body 1 are applied to the one structural body 1. Communicated. As shown in FIG. 11B, the fixing unit 91 also transmits the shearing force to one of the structures 1 by the projected area that faces the acting direction of the shearing force.

  The shearing force from the other structural body 6 (the connecting member 7) received by the outer peripheral surface of the main body 92 is that of the fixing unit 91 located on the side facing the outer peripheral surface of the main body 92 as shown in FIG. It is transmitted to one structure 1 from the outer peripheral surface and the inner peripheral surface of the fixing portion 91 located on the same side as the outer peripheral surface of the main body 92. The shearing force acting on one structure 1 is transmitted to the other structure 6 (the connecting member 7) through the reverse path.

  In this way, the fixing unit 91 is formed on the outer periphery of the main body 92 of the fixing member 9, and at least a part of the main body 92 is located in the other structure 6 (the connecting member 7). Is inserted into the groove 1b of one structure 1, so that the outer peripheral surface of the main body 92 is in contact with the other structure 6 (the connecting member 7), and the outer peripheral surface of the fixing unit 91 is in contact with one structure 1. Will be in contact.

  For this reason, the shearing force from the other structure 6 (the connecting member 7) is transmitted from the outer peripheral surface of the main body 92 to the main body 92, and is transmitted from the fixing unit 91 to one structure 1. Since the fixing portion 91 of the fixing member 9 is fitted in the groove portion 1 b formed in an annular shape or the like, a shearing force is transmitted to one structure 1 from the outer peripheral surface and the inner peripheral surface of the fixing portion 91.

  When the fixing member 9 is viewed in a direction perpendicular to the axial direction, as shown in FIG. 9, the fixing member 9 has a shape (three-dimensional) having an equivalent length (projection area) in two directions (horizontal direction and vertical direction). Shape) and a shape having no directivity in a direction orthogonal to the axial direction can transmit a shearing force in the vertical direction. However, when one structure (main structure 1) and the other structure (additional structure 6 (connecting member 7)) behave independently, the fixing member 9 is between the opposing surfaces of both structures 1 and 6. In addition, in order to exhibit the function of causing relative rotational deformation around the horizontal axis, it is formed in a shape that does not hinder the relative rotational deformation of both structures 1, 6.

  “A shape that does not hinder the relative rotational deformation of both structures 1, 6” means that the main body portion remains in a state where the fixing portion 91 of the fixing member 9 is fixed to the structure on the side as shown in FIG. That is, the structure on the 92 side has a shape that can be rotationally deformed relative to the structure on the fixing portion 91 side along the surface of the main body 92 having a convex shape. Since it is the relative rotation of the main structure 1 and the additional structure 6, the magnitude of the absolute rotation angle from the state before the rotational deformation of each structure is not questioned.

  “Rotating and deforming along the surface of the main body 92” means, for example, a horizontal plane parallel to the contact surface of one structure (main structure 1) and the other structure (connecting member 7) as shown in FIG. When viewed in the direction, when the surface on the other structure (connecting member 7) side of the main body 92 has a convex curve (three-dimensionally curved), the other structure ( It means that the connecting member 7) rotates with respect to one structure (main structure 1) along the surface of the main body 92 so as to cause slippage.

  The main structure 1 and the additional structure are provided by including a fixing portion 91 where the fixing member 9 is fixed to one structure 1 and a main body 92 having a convex shape on the other structure 6 (connecting member 7) side. When the relative rotational deformation between the bodies 6 (the connecting members 7) is about to occur, the main body 92 may be deformed due to the possibility that the fixing portion 91 tends to rotationally deform with respect to the structure 1 on the side. There is a high possibility that the structure 6 (the connecting member 7) on that side is going to rotate and deform. Due to this difference in possibility, the fixing member 9 maintains the state of being fixed to one structure 1 in the fixing portion 91 and tries to move relative to the other structure 6 in the main body 92.

  As a result, since the relative rotational deformation is not hindered between the main structure 1 and the additional structure 6 (the connecting member 7), the main structure 1 and the additional structure due to the forced rotational deformation. 6 (joint member 7) is not damaged, and rotational deformation occurs. The fixing member 9 transmits a horizontal shearing force in a direction orthogonal to the opposing direction between the main structure 1 and the additional structure 6 (the connecting member 7), and the two structural bodies 1 and 6 around the horizontal axis in that direction. By allowing the relative rotational deformation, the function of pin-bonding the main structure 1 and the additional structure 6 (the connecting member 7) to the bending moment around the horizontal axis is exhibited.

  When the connecting member 7 and the main structure 1 are made of concrete, the main structure of the connecting member 7 is deformed relatively around the horizontal axis from the state where the connecting member 7 is joined to the main structure 1. This occurs when skin separation occurs between the end face on the body 1 side and the opposing surface of the main structure 1.

  Since the main body 92 of the fixing member 9 has a shape on the surface, the relative deformation between the main structure 1 (the beam 3) and the additional structure 6 (the connecting member 7) is likely to occur. When 1 and 6 vibrate independently due to seismic force or wind load and are about to undergo relative rotational deformation, there is a horizontal gap between the opposing surfaces of both structures 1 and 6 as indicated by arrows in FIG. When the bending moment around the axis acts, skin separation tends to occur, and relative rotation around the horizontal axis occurs. This rotation occurs alternately in positive and negative directions.

  At this time, in order for the fixing member 9 to positively generate the rotational deformation without hindering the relative rotational deformation between the main structure 1 (beam 3) and the additional structure 6 (connecting member 7), It is better not to maintain the state in which the fixing member 9 is fixed across both the main structure 1 (beam 3) and the additional structure 6 (connecting member 7), and the fixing portion of the fixing member 9 as shown in FIG. While the state 91 is fixed to one of the main structure 1 (beam 3) and the additional structure 6 (connecting member 7) (main structure 1 (beam 3)), the other (additional structure 6) It is appropriate that (the connecting member 7) is in a state in which the main body 92 can be rotationally deformed along the surface of the main body 92.

  Therefore, the surface of the main body 92 fixed to the other structure (the additional structure 6 (the connecting member 7)) is formed in a curved surface that is convex toward the structure, so that the two structures 1 and 6 are relative to each other. Thus, a state in which the structure (additional structure 6) on the main body 92 side is along the surface of the main body 92 and can be rotationally deformed with respect to the main body 92 when attempting to cause rotational deformation. Specifically, the “curved surface” means that the main body 92 of the fixing member 9 has an elliptical paraboloid such as a bowl or other curved surface, or a polyhedral shape. The “obtained state” corresponds to the fact that the edge between the structure on the main body 92 side (additional structure 6) and the surface of the main body 92 is cut (separated). The above-mentioned “separation of the skin” occurs as a result of the edge between the structure (connecting member 7) on the main body 92 side and the surface of the main body 92 being cut and rotating.

  For example, as shown in FIG. 6, the fixing member 9 is fixed to the main structure 1 (beam 3) and the main body 92 is fixed to the additional structure 6 (connecting member 7), so that the fixing member 9 is both structures 1. When the two structural bodies 1 and 6 are about to undergo relative rotational deformation in a case where they are installed across the two, the main structural body 1 (beam 3) and the additional structural body 6 (the connecting member 7) If it is assumed that skin separation occurs between the end surfaces (contact surfaces), in the example of FIG. 6, the additional structure 6 (the connecting member 7), which is a structure on the side having a relatively small height (composition or thickness). Tries to rotate around the lower end or upper end of the end face on the main structure 1 (beam 3) side as the center of rotation. The additional structure 6 (the connecting member 7) rotates alternately around the lower end of the main structure 1 (beam 3) side end surface and rotates around the upper end. The rotation center of the relative rotational deformation of both structures 1 and 6 is also the center of bending when the anchor 10 inserted through the fixing member 9 causes bending deformation.

  Thus, when the main structure 1 (beam 3) and the additional structure 6 (joining member 7) are relatively rotationally deformed, the structure (joint) on the side having a relatively small height (composition (thickness)). The member 7) tries to rotate with respect to the other structure with the lower end and upper end as the center of rotation. Therefore, regardless of which side the main body 92 is fixed to the structure on which side, the surface of the main body 92 is in the direction in which the main structure 1 (beam 3) and the additional structure 6 (connecting member 7) face each other. When viewed in the orthogonal horizontal direction (the direction of the rotational center (rotation axis) of relative rotational deformation), the lower end and upper end of the structure (connecting member 7) on the side with the smaller height (composition or thickness) are It is rational that the center is formed in an arc shape or a shape close thereto.

  Since it is “when viewed in the direction of the rotation center (rotation axis)”, as shown in FIG. 9, the “arc shape or a shape close thereto” is a rotating body formed by rotating a curve around the axis of the fixing member 9. In addition to the case of a three-dimensional shape such as a shape and the case of including a part of the three-dimensional shape as shown in FIG. In some cases, an arc shape or a shape close thereto is drawn.

  “A circular arc centering on the lower end and the upper end of the structure on the side with a small height (the connecting member 7)” means that the upper half of the outline line with respect to the axial center line of the fixing member 9 is on the side with the small height. Draw an arc centered at the lower end of the surface of the structure (connecting member 7) on the opposite structure (beam 3) side, or a curve or polygon close to it, with the lower half of the outline centering on the upper end To draw a circular arc or a curve or polygon close to it.

  If the main body 92 of the fixing member 9 functions to allow relative rotational deformation of the two structures 1 and 6 and to transmit a horizontal shearing force in a direction perpendicular to the direction in which the two structures 1 and 6 face each other. Therefore, it is relative that the surface of the main body 92 is formed in an arc shape centered on the lower end and the upper end of the structure (connecting member 7) on the side with a small height (composition or thickness). The shape may be any shape as long as it is viewed in parallel with the axis of rotation, and does not necessarily have a three-dimensional shape such as an arc (rotary body shape). FIG. 9 shows an example in which the main body 92 has a rotating body shape, but FIG. 10 shows an outer shape of the arc when viewed in the axial direction (horizontal direction) of rotation, which is seen in a plane. In this example, the main body portion excluding the fixing portion 91 has a T-shape.

  An insertion hole 92a is formed in the central portion of the fixing member 9 when viewed in the axial direction, penetrating through the main body 92 in the axial direction, and fixed to both the structures 1 and 6, and the fixing member 9 is formed in the insertion hole 92a. The anchor 10 which exhibits the restoring function after the relative rotational deformation between the main structure 1 and the additional structure 6 (the connecting member 7) is inserted. The anchor 10 is inserted in the insertion hole 92 a of the fixing member 9 and is disposed in a state straddling the main structure 1 and the additional structure 6, and is fixed to the main structure 1 and the additional structure 6, thereby being fixed together with the fixing member 9. The shearing force received from the additional structure 6 (main structure 1) is transmitted to the main structure 1 (addition structure 6).

  For the anchor 10, a rod-shaped steel material such as a bolt (anchor bolt) or a steel bar is mainly used, but a fiber reinforced plastic or the like is also used. When a bolt is used for the anchor 10, a nut 11 may be attached to the anchor 10 (bolt) as shown in FIG. When the nut 11 is connected to the axial end portion of the anchor 10, the nut 11 serves to secure a fixing effect (pulling resistance) in the structures 1 and 6 and is connected to a position where it contacts the fixing member 9. In this case, the anchor 10 is joined (regulated) to the fixing member 9 so that the position of the anchor 10 relative to the fixing member 9 does not change.

  The anchor 10 also maintains a state in which it is fixed to each of the main structure 1 and the additional structure 6 on both sides of the fixing member 9, so that the anchor 10 is bent or deformed within an elastic range, or is bent and stretched. By causing the deformation, the main structure 1 and the additional structure 6 follow at the time of relative rotational deformation. When the anchor 10 is bent and deformed within the elastic range, the anchor 10 follows the relative rotational deformation of the structures 1 and 6 and functions as a spring that restores the deformation after the rotational deformation ends. Since both ends of the anchor 10 in the axial direction are fixed to the main structure 1 and the additional structure 6 respectively, the separation of the main structure 1 and the additional structure 6 is suppressed (restricted) when elongation deformation occurs. ) Also works.

A horizontal shearing force in the row direction between the main structure where the projecting member projects outward in the span direction from the surface facing the beam direction and the surface on the side of the span member in the span direction. A connecting member that is positioned below the projecting member from the additional structure and that projects to the main structure side is joined to the main structure so as to be able to rotate and be added to the additional structure. Since the clearance that allows relative deformation of the extension member relative to the additional structure is secured between the structure and between the extension member and the connecting member, bending deformation occurs on the additional structure side. It is possible to avoid a collision between the projecting member of the main structure and the connecting member.

When the main structure is an existing structure and the additional structure is an anti-seismic (seismic) reinforcement frame, an example of a structure in which both structures are joined together with the extension member of the main structure in FIG. It is the perspective view which showed the joining state with the connection member of a structure. It is the other perspective view which showed the joining state of the overhang | projection member of the main structure in FIG. 3, and the connection member of an additional structure. It is the perspective view which showed the example of the structure which joined both structures when a main structure is an existing structure and an additional structure is an earthquake-resistant (damping) reinforcement frame. (A) shows a model of the relationship between the main structure when the main structure constituting the structure shown in FIG. 3 undergoes bending deformation and the additional structure that undergoes shear deformation following the main structure. FIG. 5B is an elevation view in the column direction showing the relationship between the two structures when the main structure and the additional structure undergo shear deformation. (A) is an elevation showing a part of the elevation shown in FIG. 4- (a) extracted and enlarged, and (b) is an additional structure of a connecting member in contrast to (a). It is the elevation which showed the mode after bending deformation in case there is no fluctuation | variation in the level of a junction part. It is the longitudinal cross-sectional view which showed a mode that the beam of the main structure and the joining member of the additional structure were joined using the fixing device which consists of the fixing member and anchor which had a spherical surface. (A) is the top view which showed the construction state between the main structure and additional structure of a joining member at the time of using the floor slab of precast concrete as a joining member, (b) is xx line of (a) Sectional drawing, (c) is a plan view of (b). FIG. 7 is a perspective view illustrating a state in which the fixing device illustrated in FIG. 6 is located on the boundary surface between the main structure and the additional structure as viewed from the fixing unit side of the fixing member. FIG. 7 is a perspective view showing a state in which the fixing device shown in FIG. 6 is located on the boundary surface between the main structure and the additional structure as viewed from the main body side of the fixing member. FIG. 10 is a perspective view illustrating a state in which the fixing device when the main body portion of the fixing member illustrated in FIG. 9 has a T-shaped planar shape is viewed from the main body portion side of the fixing member. (A) is a longitudinal sectional view showing the basic shape of the fixing member and the state of transmission of shearing force from the connecting member of the additional structure to the beam of the main structure, and (b) is a rear view of (a). . (A) is the longitudinal cross-sectional view which showed the example of the main structure which is an existing structure, (b) is the longitudinal cross-sectional view which showed a mode that the additional structure was joined to the main structure shown in (a). It is an enlarged view of the junction part of the extending member of the main structure in FIG. 12- (b), and the connecting member of an additional structure. FIG. 13 is a plan view of FIG. 12B is a longitudinal sectional view showing an example in which the additional structure is joined to and supported by the surface of the main structure (existing structure) on the additional structure side instead of on the ground in the example of FIG. is there.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows that the main structure 1 bears on the surface of the main structure 1 on the side of the extending member 2 in the span direction of the main structure 1 in which the extending member 2 such as a slab or ridge extends outward in the span direction from the structure facing in the row direction. A specific example of the joining structure of the structure in which the additional structure 4 that shares a part of the external force to be transmitted and transmits the horizontal shearing force in the direction of crossing with the main structure 1 is arranged and joined to the main structure 1 Show.

  The projecting member 2 projects in a cantilevered manner from a beam (girder) 3 or the like that is a casing constituting the surface of the main structure 1 on the additional structure 6 side. Since the projecting member 2 projects from the beam 3 etc. in a cantilever state, it is rigidly joined to the beam 3 etc. In addition to the beam 3, the beam 3 and the like include a column 4 and the like that are joined to the beam 3 and form a construction in the column direction together with the beam 3. The projecting member 2 projecting from the beam 3 etc. of the main structure 1 to the additional structure 6 side is a joint between the beam 3 and the column 4 which is laid between the planes of the beam running direction (span direction) in addition to the slab etc. In some cases, the beam 3 extends from the side to the additional structure 6 side.

A connecting member 7 such as a slab (floor slab) or a width, for example, a flat beam, located below the projecting member 2 projects from the additional structure 6 to the main structure 1 side. The end on the structure 1 side is joined to the main structure 1. The end of the connecting member 7 on the main structure 1 side is capable of being rotationally deformed with respect to the main structure 1 in a direction opposite to the direction of the bending deformation when the main structure 1 is bent in the span direction. Joined to the body 1. Specifically, the end of the connecting member 7 on the main structure 1 side is interposed between the connecting member 7 and one of the main structures 1 (beam 3) via a fixing device 8 as shown in FIG. Are joined to the beam 3 of the main structure 1.

  The end of the connecting member 7 on the side of the additional structure 6 is joined to one of the later-described housings such as a beam 6b constituting the additional structure 6. Since the connecting member 7 projects from the beam 6b etc. to the main structure 1 side in a cantilever state, it is rigidly joined to the beam 6b etc.

  In FIG. 1, FIG. 2, etc., studs (anchors) 6 f protruding in a plurality of stages on the main structure 1 side of the steel member (H-shaped steel) constituting the beam 6 b of the additional structure 6 are embedded in the connecting member 7. Then, the fixing member 7 is firmly and integrally joined to the beam 6b by fixing, but it is arbitrary whether the beam 6b is a steel structure or a reinforced concrete structure. Any method for rigidly joining to 6b can be used. As described above, the end of the connecting member 7 on the additional structure 6 side is rigidly joined to the beam 6b, whereas the end of the main structure 1 side can be rotationally deformed around the horizontal axis of the beam 3 or the like. In such a state, for example, as shown in FIG. 1, they are joined via fixing devices 8 arranged in one stage in the beam forming direction.

  Between the projecting member 2 and the additional structure 6 and between the projecting member 2 and the connecting member 7, as shown in FIGS. 1 and 2, the main structure 1 is bent in the span direction. A clearance for allowing relative rotation deformation of the extension member 2 with respect to the additional structure 6 is ensured. The clearance is secured between the tip of the extension member 2 on the side of the additional structure 6 and any portion of the additional structure 6 in the direction in which both the structural bodies 1 and 6 face each other (span direction). Is secured between the lower surface (lower end) of the overhang member 2 and the upper surface (upper end) of the connecting member 7.

  As the clearance in the vertical direction secured between the lower surface of the overhang member 2 and the upper surface of the connecting member 7 is larger, the collision between the members 2 and 7 is less likely to occur, and either of them can be damaged. Sexuality decreases. However, if the clearance is large, when the joining member 7 is joined to the beam 3 of the main structure 1, the entire end surface of the joining member 7 having a certain thickness on the side of the beam 3 is completely brought into contact with the side surface of the beam 3. It can be difficult to contact. Further, if the entire surface of the connecting member 7 is brought into contact, the thickness of the connecting member 7 may be reduced (sacrificed), so it is reasonable to keep the vertical clearance as small as possible. It is.

  The larger the horizontal clearance between the tip of the overhang member 2 and any part of the additional structure 6, the less likely it is to cause a collision between them, but the additional structure 6 should be kept away from the main structure 1. Therefore, the stress borne by the end of the connecting member 7 is increased according to the distance between the structures 1 and 6, and therefore the horizontal clearance is preferably as small as possible.

  From the aspect of limiting the clearance between the projecting member 2 and the connecting member 7 and between the projecting member 2 and the additional structure 6, the lower surface of the connecting member 7 is connected to the beam 3 of the main structure 1. It is appropriate that the connecting member 7 is arranged and joined to the beam 3 so that it is positioned above the lower surface (lower end) of the beam and the upper surface of the connecting member 7 is positioned above the center of the cross section of the beam 3. . By satisfying this relationship, the eccentric distance between the center on the cross section of the connecting member 7 and the center on the cross section of the beam 3 is suppressed or reduced, so that the thickness of the connecting member 7 is sufficient. It is possible to reduce the torsional moment that acts on the beam 3 from the connecting member 7 while ensuring the size, that is, without reducing the thickness of the connecting member 7.

  The combination of the main structure 1 and the additional structure 6 includes, for example, an existing structure as the main structure 1 as shown in FIGS. (Seismic control) In addition to the combination of new structures as additional structures 6 to be reinforced, there are combinations of new structures constructed in parallel in the span direction.

  A fixing member 9 and an anchor 10 constituting a fixing device 8 to be described later for joining the connecting member 7 of the additional structure 6 to the main structure 1 are either a frame 3 or an additional structure such as the beam 3 of the main structure 1. Since it is fixed (embedded) inside the connecting member 7 of the body 6, the beam 3 of the main structure 1 and the connecting member 7 of the additional structure 6 over which the fixing device 8 straddles are mainly reinforced concrete. However, when the fixing device 8 is installed later (retrofitted) on the constructed main structure 1, at least the area where the fixing device 8 is disposed may be made of cast-in-place concrete. As shown, the portions of the connecting member 7 other than the fixing device 8 may be made of precast concrete.

  FIG. 7- (a) shows a pre-cast intermediate portion of the connecting member 7 in the longitudinal direction excluding the joint portion at the main structure 1 (beam 3) side end portion and the joint portion at the additional structure 6 (beam 6c) side end portion. The arrangement | positioning state between the main structure 1 and the additional structure 6 at the time of comprising with a plate made from concrete is shown. 7B shows a cross section taken along line xx of FIG. 7A, and FIG. 7C shows a plane of FIG. 7B. In FIG. 7- (b), a fixing material such as a fixing streak (anchor) straddling both of the connecting member 7 and the beam 6c on both sides in the span direction is disposed between the two members. The concrete is filled by filling concrete or mortar, but the joining method of the precast concrete connecting member 7 and the beams 3 and 6c on both sides in the span direction is arbitrary.

  In FIG. 7- (b), a cavity capable of accommodating the fixing device 8 is formed at the end of the connecting member 7 on the main structure 1 (beam 3) side, and concrete or the like is subsequently filled in the cavity. . From the end of the connecting member 7 on the side of the additional structure 6 (beam 6c), a fixing bar or the like embedded in the precast concrete is projected to the beam 6c side, and this fixing bar or the like is, for example, a stud protruding from the beam 6c. It is linked to a state in which a tensile force can be transmitted in the length direction of the connecting member 7 by being overlapped or engaged with an anchor such as 6f or a diver.

  In FIG. 7- (b), the connecting member 7 is rigidly joined to the beam 6c by filling concrete between the opposing end faces in this state. On the main structure 1 (beam 3) side, the fixing device 8 is joined (fixed) to the beam 3 of the main structure 1 in the manner of a post-construction anchor before the connecting member 7 is installed, and then the connecting member 7 is connected. Is installed in a state surrounding the fixing device 8.

  In the example of FIG. 7, at least the fixing device 8 portion of the connecting member 7 is constructed with a cast-in-place concrete structure, but the entire connecting member 7 may be constructed with a cast-in-place concrete structure. In that case, a formwork (dam plate) is formed between the lower surface of the overhang member 2 and the upper surface of the connecting member 7 to be constructed to form a clearance between the completed connecting member 7.

  If the formwork can be recovered after placing the connecting member 7 on the concrete due to the clearance, the formwork is recovered in principle, but the formwork may remain (or be left) after use. is there. If it is difficult to recover the formwork after the completion of the role, use a formwork in a form that maintains the expanded state by, for example, air injection and contracts by exhaust after use. It is also possible.

  1 to 3, as described above, an anti-seismic (seismic) reinforcement frame as an additional structure 6 is constructed in parallel to the structure on one side of the existing structure as the main structure 1, and the beam of the existing structure 3 shows an example in which a slab as the connecting member 7 of the earthquake-proof reinforcement frame is joined using the fixing device 8. Details will be described below based on this example. In FIG. 3 and FIG. 12- (a), the code | symbol 5 shows the foundation of the existing structure (main structure 1).

  FIG. 6 shows a longitudinal section of the joint between the beam 3 and the connecting member 7 shown in FIG. In the example of FIGS. 1 to 3, the additional structure 6 includes a frame including columns 6 a and beams 6 b facing the surface of the main structure 1, and a frame including a brace 6 c as a seismic element built in the frame. The connecting member 7 (slab) that protrudes from the level of the beam 6b toward the main structure 1 and is joined to the beam 3 of the main structure 1 is a basic component.

  The column 6a of the additional structure 6 is divided in a section unit including a joint portion with the beam 6b in the height direction, and the columns 6a and 6a adjacent in the height direction can be relatively moved in the horizontal direction at the divided positions. A seismic isolation device 6e such as a laminated rubber bearing, a sliding bearing, an elastic sliding bearing, etc., is connected to the joint, and a brace 6c with a built-in damper 6d that generates a damping force during axial expansion and contraction is provided between the column and beam joints. It is erected.

  In FIG. 1 and FIG. 2, the end of the connecting member 7 on the beam 6b side of the additional structure 6 is arranged in the height direction on the H-shaped steel constituting the beam 6b in order to ensure the integrity with the beam 6b. A plurality of studs (anchors) 6 f that are arranged and welded are joined to the beam 6 b so as to be embedded in the connecting member 5. On the other hand, on the main structure 1 side, the end of the connecting member 7 is integrated with the main structure 1 for the purpose of joining the main structure 1 so as to be able to rotate and deform around a horizontal axis in the composition plane. Bonding is performed via fixing devices 8 arranged in one stage so that the effect of the property does not increase. A large number of fixing devices 8 are arranged in the in-plane direction, and one or more stages are arranged in the height direction. When arranged in multiple stages in the height direction, they may be arranged in a staggered pattern.

  The function of the seismic isolation device 6e is that the additional structure 6 is not a mere seismic reinforcement frame, but a seismic reinforcement frame that attenuates the horizontal force while reducing the input of the horizontal force during the earthquake to the main structure 1. Is interposed to serve to connect the columns 6a, 6a divided in the height direction so as to be relatively movable in the horizontal direction, but the additional structure 6 is a seismic reinforcement frame. In such a case, it is not always necessary.

  The fixing device 8 is disposed across the boundary (boundary surface) of the connecting member 7 between the main structure 1 (beam 3) and the additional structure 6, and includes a fixing member 9 having an insertion hole 92a, and the fixing member 9 in the axial direction. The anchors 10 are fixed to both structures 1 and 6 and are bent and deformable.

  The fixing member 9 is fixed to one of the main structure 1 (the beam 3) and the additional structure 6 (the connecting member 7) and fixed to the other structure 6, and the side thereof. The main body 92 is formed in a convex shape, and the structure 6 on the side of the main body 92 is in a state in which it can be rotationally deformed relative to the fixing member 9 along the surface of the main body 92. The body portion 92 is formed with one or a plurality of insertion holes 92a through which the anchor 10 is inserted.

  As shown in FIG. 11, the fixing member 9 includes a fixing portion 91 that fits into a groove portion 1 b formed on the other surface of either the main structure 1 or the additional structure 6 (the connecting member 7), It consists of two parts, a main body 92 that is continuous with the fixing portion 91 and is embedded in the other structure. With the fixing portion 91 fitted in the groove portion 1b, the groove portion 1b is filled with a filler such as mortar or adhesive, so that the movement of the fixing portion 91 in the groove portion 1b is restricted, and the fixing portion 91 is stabilized. Be made.

  1, 2, and 6, the fixing member 9 is disposed with the fixing portion 91 facing the main structure 1 (beam 3) and the main body 92 facing the additional structure 6 (connecting member 7). However, the fixing member 9 may be arranged in any axial direction, with the fixing portion 91 facing the additional structure 6 and the main body 92 facing the main structure 1. Sometimes.

  The fixing member 9 is disposed between the structures 1 and 6 in a state of straddling the boundary surface between one structure (main structure 1) and the other structure (additional structure 6). As shown, at least a part of the fixing portion 91 in the axial direction is located in the structure (main structure 1) on the side. The groove portion 1 b is formed in a ring shape corresponding to the shape of the fixing portion 91 or a plate shape such as a disk shape including an annular shape surrounding the fixing portion 91.

  The fixing portion 91 is fixed in a state where the fixing portion 91 is fitted in the groove portion 1b of the structure (main structure 1) on the side thereof, so that a direction orthogonal to the direction in which both the structures 1 and 6 face each other (out-of-plane direction) ( 6), when both structural bodies 1 and 6 try to rotate and deform relatively around the horizontal axis in the in-plane direction, as shown in FIG. The state fixed to the structure (main structure 1) is maintained. The fixing portion 91 exhibits a resistance corresponding to the projected area in the direction against the horizontal shearing force, and resists a bending moment about the horizontal axis in the in-plane direction at the time of rotational deformation. In order to secure the resistance force, it is formed in an annularly closed shape as shown in FIG.

  The main body 92 may have a portion in which at least a part of the surface on the other structure (additional structure 6) side where it is located is formed in a convex curved surface shape or a polyhedron shape close thereto. The fixing member 9 is mainly formed of a metal material such as a steel material, but the material of the fixing member 9 is not limited, and the fixing member 9 is also formed of a fiber reinforced plastic or the like.

  As described above, the insertion hole 92a through which the anchor 10 is inserted at one place or a plurality of places is formed at or near the center of the fixing member 9 on the plane of the main body 92. In the state where the anchor 10 is inserted through the insertion hole 92a, the anchor 10 is applied to one structure (main structure 1) and the other structure (additional structure 6). Accordingly, the anchor 10 is fixed with a sufficient fixing length so as not to come out even when the anchor 10 is stretched and deformed.

  As described above, the anchor 10 secures a clearance between the case where the anchor 10 is connected to the main body 92 by being screwed into the female screw formed on the inner peripheral surface of the insertion hole 92a and the inner peripheral surface of the insertion hole 92a. In addition to simply inserting the insertion hole 92a in the state, the insertion hole 92a may be filled with an adhesive, mortar, or the like and connected to the main body 92 while being inserted through the insertion hole 92a. .

  The insertion hole 92a of the main body 92 is formed at the center of the main body 92, etc., but it is not always necessary to have one at the center of the main body 92, and a plurality of holes may be formed. Depending on the number of insertion holes 92a, one or a plurality of anchors 10 are inserted into the main body 92, but the number does not hinder the relative rotational deformation between the main structure 1 and the additional structure 6. Is set. However, when the restoring force of the anchor 10 after the rotational deformation of both the structures 1 and 6 is expected, it is advantageous to insert a plurality of anchors 10.

  When the anchor 10 functions as a resistance element against the shearing force in the direction orthogonal to the axis, the resistance force corresponding to the projected area in the shearing force acting direction of the anchor 10 is added to the shearing resistance force of the fixing unit 91. When the anchor 10 is expected to function as a resistance element against a shearing force, a diameter (thickness) and a length corresponding to the expected shearing resistance force are given.

  The anchor 10 is screwed into an insertion hole 92a formed in the fixing member 9, or simply inserted into the insertion hole 92a, and the insertion hole 92a is filled with an adhesive, mortar, or the like. Although it may be integrated with the main body 92, the anchor 10 is inserted into the insertion hole 92 a of the fixing member 9 (main body 92) and maintains a state in which the main body 92 can be bent and deformed. It is better that a certain degree of clearance is secured between the inner peripheral surface of the insertion hole 92a and the surface of the anchor 10.

  Similarly to the fixing unit 91, the main body 92 is fixed in a state where it is embedded in the structure (additional structure 6) on the side, so that both the structures 1 and 6 face each other (out-of-plane direction). Resists horizontal shearing force in the direction perpendicular to the surface (in-plane direction). When both the structural bodies 1 and 6 are about to be rotationally deformed around the horizontal axis in the in-plane direction, the structural body on that side (additional structural body 6) slides along the surface of the main body 92, It is formed in a curved surface so as to help the occurrence of relative rotational deformation with respect to the structure (main structure 1) on the fixing unit 91 side.

  The surface of the main body 92 is formed in, for example, a spherical surface, a three-dimensional curved surface shape close to it, or a polyhedral shape. However, when the other structure (additional structure 6) tends to undergo relative rotational deformation with respect to one structure (main structure 1), the other structure (additional structure 6) Since the connection member 7, which is a housing joined to one structure (main structure 1), tries to rotate with the lower end and upper end on the one structure (main structure 1) side as the center of rotation, the main body portion It is most desirable that the surface of 92 has an arc centered on the center of rotation when viewed in the horizontal direction in the composition plane.

  6 and 9 show an example in which the surface of the main body 92 is a spherical surface, and FIG. 10 shows a shape in which the surface is a part of the spherical surface and parts other than the portion where the insertion hole 92a is formed are removed. An example of the case is shown. In any case, the projected area in the direction resists the horizontal shearing force, but in the case of FIG. 10, a plane perpendicular to the acting direction of the horizontal shearing force is formed. There is an advantage in that it is possible to save material costs while ensuring the same resistance as the case.

  The anchor 10 is inserted through the insertion hole 92a of the main body 92, and both axial ends are fixed to the main structure 1 and the additional structure 6 (the connecting member 7). The anchor 10 bears a shearing force in the horizontal direction in the composition plane, and bears a bending moment at the time of rotational deformation around the horizontal axis parallel to the direction, and has a diameter and a length so as to exhibit a function of restoring after the rotational deformation. Is decided. In addition to the nut 11 being connected to the anchor portion of the anchor 10 to the structures 1 and 6 as described above, a rib may be formed by cutting an internal thread or the like.

  By fixing the fixing portion 91 of the fixing member 9 into the groove portion 1b of one structure (main structure 1), the shearing force from the other structure (additional structure 6) is generated from the fixing portion 91 as described above. The main body 92 that is transmitted to one structure (main structure 1) but receives shearing force from the other structure (additional structure 6) is transferred from the fixing portion 91 to one structure (main structure 1). , The fixing portion 91 has a function of ensuring the rigidity of the fixing portion 91 so that the fixing portion 91 is not deformed by a reaction force from one structure (main structure 1).

  A cylindrical protruding portion that protrudes to at least one of the front surface side and the back surface side may be formed around the insertion hole 92a of the main body 92 of the fixing member 9. The protruding portion is formed with a hollow cross section that is continuous with the insertion hole 92a, and the anchor 10 is inserted through the insertion hole that is formed in the protruding portion continuously with the insertion hole 92a. Since the formation of the protrusion on the main body 92 changes the cross-sectional shape of the main body 92, the protrusion functions to improve the cross-sectional performance (second moment of cross section) of the main body 92.

  The projecting portion is formed so as to project from the main body portion 92 to at least one of the front surface side (additional structure 6 side) and the back surface side (main structure 1 side). , Together with the main body portion 92, or the shearing force from the additional structure 6 is transmitted to the main structure 1 together with the fixing portion 91. The projecting portion bears a shearing force from the additional structure 6 when formed on the front side of the main body 92, and transmits the shearing force to the main structure 1 when formed on the back side. The protrusions may be continuously formed on the front side and the back side of the main body 92.

  8 shows the fixing member 9 shown in FIG. 6 as viewed from the fixing portion 91 side (main structure 1 side), and FIG. 9 shows the fixing member 9 as viewed from the main body portion 92 side (additional structure 6 side). Indicates. The side surface of the beam 3 (the end surface of the connecting member 7 of the additional structure 6), which is the boundary surface between the main structure 1 (beam 3) and the additional structure 6 (connecting member 7), extends from the fixing portion 91 of the fixing member 9 to the main body. The fixing unit 91 is located in the beam 3 of the main structure 1 and the main body 92 is located in the connecting member 7 of the additional structure 2.

  FIG. 10 shows the fixing member 9 when the main body 92 is formed in a shape in which the main body 92 in FIG. 9 is removed from the main body 92 excluding the insertion hole 92a through which the anchor 10 is inserted. The state seen from the body 6 side) is shown. In FIG. 10, the region including the insertion hole 92 a of the main body 92 in FIG. 9 is left in a strip shape, and other regions are removed, and the main body 92 is formed in a T shape on a plane.

  When the main body 92 is formed in the shape shown in FIG. 10, the side surface of the portion that is left in the band shape is the horizontal direction in which the main structure 1 (beam 3) and the additional structure 6 (joint member 7) cause displacement deformation. By disposing the fixing member 9 in a facing state, there is an advantage that the horizontal shearing force in that direction is easily received. If the horizontal shearing force is not perpendicular to the surface that receives the shearing force, the surface cannot fully support the horizontal shearing force, whereas the side surface of the part that is left in the strip shape is not affected by the horizontal shearing force. If it is vertical, it is based on the fact that its side can fully bear the horizontal shear force.

  FIG. 12- (a) is a specific example when the main structure 1 is an existing structure, and FIG. 12 (b) is a diagram of the seismic reinforcement frame shown in FIG. 3 on one side in the span direction of the main structure 1 shown in FIG. An example where the additional structure 6 as an example is constructed on the ground and joined to the main structure 1 is shown. In FIG. 12-(b), a new foundation 13 is constructed so as to overlap the foundation 5 of the main structure 1 (existing structure), and the additional structure 6 is constructed on the foundation 13. FIG. 13 is an enlarged view of a joint portion between the projecting member 2 of the main structure 1 and the connecting member 7 of the additional structure 6 in FIG. FIG. 14 shows the relationship between the additional structure 6 in FIG. 12- (b) and the connecting member 7 projecting from the beam 6b to the main structure 1 side.

  FIG. 12- (b) has shown the example in the case of standing the pillar 6a of the additional structure 6 on the foundation 13 newly built in the ground, and transmitting the vertical load of the additional structure 6 to the foundation 13. FIG. . On the other hand, in FIG. 15, a support member 12 that supports the additional structure 6 is joined to the outside of the surface of the additional structure 6 on the main structure 1 (existing structure), and a column 6 a is attached to the support member 12. An example in which the additional structure 6 is supported by the main structure 1 through the support member 12 by standing is shown.

  In the example of FIG. 15, when an outdoor facility 14 such as a store, a carriage, a front door, or the like protrudes from the construction surface of the main structure 1 to the additional structure 6 side on the outdoor side near the lower floor of the main structure 1, This is an effective method for constructing the additional structure 6 without being affected by the presence of the facility 14. The support member 12 is constructed so as to project in a cantilevered manner from the pillar 4 constituting the construction surface of the main structure 1, and the pillar 6 a of the additional structure 6 and the connecting member 7 are constructed on the support member 12.

1 ... Main structure, 2 ... Overhang member, 3 ... Beam, 4 ... Column, 5 ... Foundation,
6 ... additional structure, 6a ... pillar, 6b ... beam,
6c …… Brace 6d …… Damper 6e …… Seismic isolation device 6f …… Stud
7: Connecting member,
8: Fixing device,
9... Fixing member, 91... Fixing portion, 92... Main body portion, 92 a.
10 ... Anchor, 11 ... Nut,
12 ... Support members, 13 ... Basics, 14 ... Outdoor facilities.

Claims (4)

A part of the external force borne by the main structure is shared with the surface of the main structure in the span direction of the main structure projecting from the structural surface facing the beam direction toward the outside in the span direction, An additional structure that transmits a horizontal shearing force in the direction of the crossing with the main structure is disposed, and a bonded structure of the structure bonded to the main structure,
From the additional structure , a connecting member located below the projecting member projects to the main structure side ,
The end of the connecting member on the main structure side is joined to the main structure in a state in which the main structure can be rotationally deformed around the horizontal axis in the row direction when the main structure is bent and deformed in the span direction.
The additional structure of the extension member when the main structure is bent in the span direction between the extension member and the additional structure and between the extension member and the connecting member. A joint structure for a structure, wherein a clearance that allows relative rotational deformation to the body is secured. The lower surface of the connecting member is located at the same level as or higher than the lower surface of the beam constituting the surface of the main structure on the projecting member side, and the upper surface of the connecting member is the center of the cross section of the beam The structure joint structure according to claim 1, wherein the structure is located at the same level as or higher than that. The end of the extension member on the side of the additional structure is such that, when the main structure is bent and deformed toward the additional structure, the connecting member that follows the main structure moves around the horizontal axis in the row direction. The distance from the said additional structure is separated from the said additional structure by the distance more than the relative horizontal movement amount to the said additional structure side of the said extension member when carrying out rotational deformation with respect to a structure. 2. A joining structure of the structure according to 2. The lower surface of the overhang member is rotated with respect to the main structure about a horizontal axis in the direction of the traversing line when the main structure is bent and deformed toward the additional structure. The structure according to any one of claims 1 to 3, wherein a distance greater than a relative vertical movement amount of the projecting member to the additional structure side when deformed is separated from the connecting member. Body joint structure.

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