JP6486592B2 - Construction structure of structure and method of reinforcing construction - Google Patents

Description

  The present invention relates to a construction structure of a structure.

  In an earthquake-resistant building that is provided with a structure that forms a communication passage, etc., spanning between structures built next to each other, one end of the structure is generally supported by a fixed support provided on one structure. However, a construction structure is used in which the other end of the structure is supported by a sliding bearing or a rolling bearing provided in the other structure. For example, in Patent Document 1, one end of a main girder installed between two adjacent sluice columns has a fixed support structure, and the other end has a movable support structure. A girder support structure is disclosed.

  In such an erection structure, at the time of an earthquake, the other end of the structure supported by the sliding bearing or the rolling bearing sways in a direction crossing the erection direction of the structure, and a large horizontal force is generated on the fixed bearing. Therefore, it is necessary to install a fixed bearing having a large horizontal strength capable of withstanding this horizontal force.

  In addition, in an existing building where such a construction structure is used, if the horizontal strength of the fixed bearing is less than the current standard, it is necessary to replace it with a fixed bearing with a large horizontal strength. A large-scale work such as jacking up the body is required, and the lower part of the structure is also subject to the work range, so there are restrictions in use.

JP 2011-106095 A

  This invention considers the fact which concerns, and makes it a subject to reduce the horizontal force which arises in the fixed support which supports the edge part of a structure.

  The invention according to the first aspect includes a fixed bearing that supports one end of the installed structure, a movable support that supports the other end of the structure, and the installation direction of the structure intersects the other end. And a damping structure for providing a damping in a direction.

  In the first aspect of the invention, the horizontal force (seismic force) generated at the fixed bearing is reduced by reducing the horizontal force generated at the other end of the structure during the earthquake and acting in the direction intersecting the erection direction of the structure. Can be reduced. Thereby, since a fixed bearing with a small horizontal proof stress can be used, the installation effort of a fixed bearing can be reduced and cost reduction can be achieved.

  According to a second aspect of the present invention, there is provided the structure of the structure according to the first aspect, wherein the damping means includes a first receiving member projecting from the structure on which the structure is installed toward the structure, and the structure. And a second receiving member projecting toward the structure.

  In the second aspect of the invention, the structure body is provided by providing the damping means between the first receiving member projecting from the structure toward the structure and the second receiving member projecting from the structure toward the structure. It is possible to arrange the damping means at a position higher than the floor slab of the. Thereby, the underfloor operation | work at the time of arrange | positioning an attenuation | damping means can be reduced or eliminated, safety | security and workability can be improved, and it can contribute to construction period shortening and construction cost reduction.

  According to a third aspect of the present invention, there is provided a method for reinforcing an erected structure that reinforces an erected structure including a fixed support that supports one end of the erected structure and a movable bearing that supports the other end of the structure. This is a method for reinforcing an installation structure in which an attenuation means for applying attenuation in a direction crossing the installation direction of the structure is provided at the other end of the structure at the other end of the structure.

  In the invention of the third aspect, it is only necessary to provide a damping means at the other end of the structure without exchanging the fixed support or the movable support. Therefore, the existing structure can be provided without performing a large-scale construction such as jacking up the structure. The erection structure can be reinforced, and restrictions on use of the lower region of the structure during the reinforcement work of the existing erection structure can be reduced or eliminated.

  Since this invention was set as the said structure, the horizontal force which arises in the fixed support which supports the edge part of a structure can be reduced.

It is a front view which shows the construction structure of the structure which concerns on embodiment of this invention. It is a perspective view showing a structure concerning an embodiment of the present invention. It is an enlarged view which shows the fixed support which concerns on embodiment of this invention. It is an enlarged view which shows the movable bearing which concerns on embodiment of this invention. It is a top view which shows the attenuation means which concerns on embodiment of this invention. It is a front view which shows the attenuation means which concerns on embodiment of this invention. It is a front view which shows the conventional earthquake-resistant building. It is a top view which shows the conventional earthquake-resistant building.

  Embodiments of the present invention will be described with reference to the drawings. First, a construction structure of a structure according to an embodiment of the present invention will be described.

  In the front view of FIG. 1, in the seismic building 20 having a reinforced concrete structure 14, 16 and a steel structure 18, which are erected on the ground 12, the structure 14 A structure installation structure (hereinafter referred to as “installation structure 10”) in which a structure 18 is installed between the structures 16 is shown. The erection structure 10 includes a fixed support 22, a movable support 24, and damping means 26.

  The structures 14 and 16 are formed in a shape in which the upper structures 14A and 16A are set back to the inner sides of the structures 14 and 16 with respect to the lower structures 14B and 16B. The structure 18 is provided as a communication bridge for people and things to move between the structure 14 and the structure 16, and a low-rise building 28 built on the ground 12 is disposed below the structure 18. Yes.

  As shown in the perspective views of FIGS. 1 and 2, the fixed support 22 is installed on the upper surface 30 of the lower structure 16B formed by the setback of the upper structure 16A, and supports one end 32 of the structure 18. doing. A plurality of fixed supports 22 (four in the example of FIG. 2) are arranged in a horizontal direction (hereinafter referred to as “X direction”) perpendicular to the installation direction of the structure 18 (hereinafter referred to as “Y direction”). Has been.

  As shown in the enlarged view of FIG. 3, the fixed support 22 has a vertical displacement of the one end portion 32 of the structure 18 with respect to the structure 16 and a horizontal position by a mechanism that rotatably supports the upper support portion 36 on the lower support portion 34. Constrain the displacement.

  As shown in the perspective views of FIGS. 1 and 2, the movable support 24 is installed on the upper surface 38 of the lower structure 14 </ b> B formed by the setback of the upper structure 14 </ b> A. I support it. A plurality of movable supports 24 (four in the example of FIG. 2) are arranged in the X direction.

  As shown in the enlarged view of FIG. 4, the movable support 24 includes a sliding plate 42 attached to the upper surface 38 of the lower structure 14 </ b> B via an installation base 48, and a sliding structure on the upper surface of the sliding plate 42. The vertical displacement of the other end portion 40 of the structure 18 with respect to the structure 14 is restrained by a mechanism of a rigid sliding support including a sliding member 46 attached to the lower surface 44 of the other end portion 40 of the 18 via the base member 50. Allow horizontal displacement.

  That is, the fixed support 22 supports one end portion 32 of the erected structure 18, and the movable support 24 supports the other end portion 40 of the erected structure 18.

  As shown in the perspective views of FIGS. 1 and 2, a plurality of damping means 26 are connected to the other end 40 of the structure 18 and the structure 14 in the X direction (2 in the example of FIG. 2). I) Attenuation is provided in the X direction of the other end 40 of the structure 18.

  As shown in the plan view of FIG. 5 and the front view of FIG. 6, the damping means 26 is an oil damper that functions as a vibration damper, and a steel receiving member 52 as a first receiving member, and a second receiving member. End portions 64 and 66 are fixed to a steel receiving member 54 as a member, and are provided between the receiving member 52 and the receiving member 54.

  The receiving member 52 is attached to a support member 58 made of reinforced concrete provided on a floor slab 56 on the connection floor of the structure 14, and projects from the structure 14 toward the structure 18. The receiving member 54 is attached to a support member 62 made of reinforced concrete provided on a floor slab 60 on the connection floor of the structure 18 and projects from the structure 18 toward the structure 14. That is, the damping means 26 is disposed at a position higher than the floor slab 60 supported by the movable support 24.

  The end portions 64 and 66 of the damping means 26 are fixed to the receiving members 52 and 54 so as to be rotatable via a ball seat, whereby the other end portion 40 of the structure 18 is moved in the X and Y directions. Following this, the piston rod of the damping means 26 expands and contracts, and damping can be imparted to the other end portion 40 of the structure 18.

  The erection structure 10 provides damping in the X direction to the existing erection structure in which one end 32 of the structure 18 is supported by the fixed support 22 and the other end 40 is supported by the movable support 24 by seismic retrofitting work. The damping means 26 is provided at the other end 40 of the structure 18 to reinforce the fixed support 22, and is constructed by a reinforcing method of the construction structure.

  Next, the operation and effect of the structure construction structure according to the embodiment of the present invention will be described.

  As shown in the front view of FIG. 7 and the plan view of FIG. 8, there is provided a structure 72 that spans between a structure 68 and a structure 70 that are built adjacent to each other and forms a communication passage or the like. In the conventional earthquake-resistant building 74, one end 76 of the structure 72 is generally supported by the fixed support 22 provided in one structure 70, and the other end 78 of the structure 72 is provided in the other structure 68. The construction structure 80 supported by the movable support 24 is used. In such construction structure 80, the other end 78 of the structure 72 supported by the movable support 24 at the time of an earthquake is the structure body. 72 swings in the direction (X direction) intersecting the installation direction (Y direction) of 72 (arrow 82), and a large horizontal force in the Y direction is generated in the fixed support 22.

  On the other hand, in the erection structure 10 of this embodiment, the horizontal force generated in the other end portion 40 of the structure 18 and acting in the X direction at the time of an earthquake is reduced by the damping means 26, thereby generating the Y direction generated in the fixed support 22. The horizontal force (earthquake force) can be reduced.

  As a result, the horizontal force (seismic force) in the Y direction generated in the fixed support 22 is reduced only by providing the damping means 26 at the other end 40 of the structure 18 without replacing the fixed support 22 and the movable support 24. Therefore, it is possible to reinforce the existing erection structure without carrying out a large-scale construction such as jacking up the structure 18, and in the lower region of the structure 18 during the reinforcement work of the existing erection structure. Restrictions on the use of the building 28 can be reduced or eliminated.

  In addition, the reinforcing method of the erection structure shown in the present embodiment is equivalent to the method of exchanging the fixed support 22 and the movable support 24 with a shorter construction period and lower cost than the method of exchanging the fixed support 22 and the movable support 24. The seismic reinforcement effect can be obtained.

  Furthermore, in the erection structure 10 of this embodiment, the damping means 26 is provided between the receiving member 52 that projects from the structure 14 toward the structure 18 and the receiving member 54 that projects from the structure 18 toward the structure 14. By providing, the damping means 26 can be arranged at a position higher than the floor slab 60 of the structure 18. Thereby, the underfloor operation | work at the time of arrange | positioning the attenuation | damping means 26 can be reduced or eliminated, safety | security and workability can be improved, and it can contribute to construction period shortening and construction cost reduction.

  The construction structure of the structure according to the embodiment of the present invention has been described above.

  In the present embodiment, the example in which the one end portion 32 of the structure 18 is supported by the fixed support 22 has been shown. However, the fixed support 22 is capable of performing vertical displacement and horizontal displacement of the one end portion 32 of the structure 18 relative to the structure 16. Any support can be used.

  Moreover, in this embodiment, although the example which supported the other end part 40 of the structure 18 with the movable support 24 was shown, the vertical displacement of the other end part 40 of the structure 18 with respect to the structure 14 can be restrained, and a horizontal displacement is suppressed. Any acceptable bearing may be used. For example, the movable bearing may be the rigid sliding bearing shown in the present embodiment, may be another sliding bearing such as an elastic sliding bearing, or may be a rolling bearing.

  Furthermore, in the present embodiment, an example in which the damping means 26 is an oil damper that functions as a vibration damper is shown. However, any damper that can provide damping against an earthquake and has a restoring force may be used. For example, the damping means may be the oil damper shown in this embodiment or a viscoelastic damper.

  In the present embodiment, as shown in FIGS. 5 and 6, an example in which one attenuation means 26 is provided at one place is shown, but a plurality of attenuation means 26 may be provided at one place. For example, a plurality of attenuation means 26 may be provided between the receiving member 52 and the receiving member 54 in a plurality in the vertical direction or the horizontal direction.

  Furthermore, if the horizontal force generated in the other end portion 40 of the structure 18 and acting in the X direction can be reduced, the damping means 26 may be provided at any location on the other end portion 40 of the structure 18 and the structure 14, It may be installed in some place. For example, the receiving members 52 and 54 may be attached to the other end 40 of the structure 18 or the pillar of the structure 14, and the attenuation means 26 may be provided between the receiving member 52 and the receiving member 54.

  Further, in the present embodiment, an example in which the erection structure 10 is constructed by renovation work is shown, but the erection structure 10 may be provided in a newly built earthquake-resistant building. For example, when the earthquake-resistant building 20 of FIG. 1 is a new building, the horizontal force generated in the other end portion 40 of the structure 18 and acting in the X direction at the time of the earthquake is reduced by the damping means 26, thereby The generated horizontal force (seismic force) in the Y direction can be reduced. Thereby, since the fixed support 22 with small horizontal proof stress can be used, the installation effort of the fixed support 22 can be reduced, and cost reduction can be achieved.

  Furthermore, in this embodiment, the structures 14 and 16 are made of reinforced concrete, and the structure 18 is made of steel, but the seismic isolation structure 10 of this embodiment is reinforced concrete, steel, or steel reinforced concrete It can be applied to buildings of various structures and scales such as CFT (Concrete-Filled Steel Tube) and their mixed structures.

  Further, in the present embodiment, the structure 18 is shown as a communication bridge for people and things to move between the structure 14 and the structure 16, but the structure is a bridge, a roof, or the like. There may be. That is, the erection structure 10 of the present embodiment can be applied to an erection structure that supports both ends of the structure by support.

  Furthermore, in the present embodiment, since the existing installation structure can be reinforced without performing a large-scale construction such as jacking up the structure 18, the structure 18 is provided in a region below the structure 18 during the reinforcement work of the existing installation structure. Although it has been stated that restrictions on the use of a certain building 28 can be reduced or eliminated, other uses such as station buildings, bus terminals, parking lots, playgrounds, etc. are arranged in the lower area of the structure 18. Even in this case, the effect of reducing or eliminating these restrictions on use can be obtained.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect.

10 Construction structure (construction structure)
14 Structure 18 Structure 22 Fixed bearing 24 Movable bearing 26 Damping means 32 One end 40 The other end 52 Receiving member (first receiving member)
54 Receiving member (second receiving member)

Claims (2)

In the installation structure of the structure in which the structure is installed between the first structure and the second structure,
A fixed support provided on the first structure and supporting one end of the structure;
A movable support provided on the second structure and supporting the other end of the structure;
A first receiving member that is erected on the connection floor of the second structure connected to the structure and then projects laterally toward the structure;
A second receiving member extending in a lateral direction toward the second structure so as to face the first receiving member after being erected on the connection floor of the structure connected to the second structure;
Attenuating means provided between the first receiving member and the second receiving member for imparting attenuation to the other end in a direction intersecting with a construction direction of the structure;
I have a,
The structure is allowed to be displaced in the erection direction of the other end, and only the horizontal force acting in the direction intersecting the erection direction is reduced.
Construction structure of the structure. A fixed support provided on the first structure and supporting one end of the structure; and a movable support provided on the second structure and supporting the other end of the structure; In the reinforcing method of the erection structure for reinforcing the erection structure of the structure in which the structure is erected between the second structure,
A connection floor of the structure connected to the second structure is provided by providing a first receiving member that is erected on the connection floor of the second structure connected to the structure and then extends in a lateral direction toward the structure. A second receiving member extending laterally toward the second structure so as to face the first receiving member after being erected, and the first receiving member and the second receiving member In the middle, the other end portion is provided with attenuation means for applying attenuation in a direction crossing the installation direction of the structure, and the displacement of the other end portion of the structure in the installation direction is allowed. A method of reinforcing an erected structure that reduces only the horizontal force acting in the intersecting direction .

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