JP4971390B2 - Ramen frame - Google Patents

Description

  The present invention relates to a frame having a rigid frame structure composed of columns and beams, and with respect to external forces such as seismic forces, the entire frame is plastically deformed while resisting external forces while maintaining the columns and beams in an elastic range. It can be absorbed and there is no reinforcing material such as braces in the frame, and a wide opening can be secured.

  The frame structure of a general ramen structure is designed so that the joints between the columns and beams are rigidly connected, and the bending of the columns and beams mainly resists external forces such as seismic force and wind force. Has been done.

  In addition, the beam is designed to yield and break before the column, even if the building breaks down. Yes (Beam preceding yield type design).

  Furthermore, in a frame with a rigid frame structure in which both the column and the beam retain the elastic range, a brace is placed in the frame consisting of the column and the beam, and the brace yields before the column and the beam. The beam is designed to retain the elastic range.

  In addition, ladder frames and seismic studs are placed in the frame as a framework of a rigid frame structure that retains the elasticity of the beam against external forces and does not have bracing or other reinforcing materials, making it possible to secure a spacious opening. Are disclosed in Patent Documents 1, 2, and 3.

Japanese Patent No. 3690460 JP 09-184322 A JP 09-125568 A

  However, since both ladder-type studs and earthquake-proof studs are arranged in a frame consisting of columns and beams, it is natural to ensure a wide opening even if the position can be changed freely. There was a limit.

  In addition, since the columns and beams are directly rigidly connected, it took a great deal of labor and cost to recover from damage in the event of an earthquake.

  The present invention has been made in order to solve the above-described problems, and can resist the external force such as seismic force while maintaining the elasticity of the beam, and is an advantage of the ramen structure and has a large space without a partition. An object of the present invention is to provide a framework of a ramen structure that can secure an opening.

The frame of the ramen structure according to claim 1 is a frame of a ramen structure comprising a lower beam or foundation, an upper beam, and a column disposed between the lower beam or foundation and the upper beam. The joint hardware for joining the column and the beam and / or the foundation is arranged at the joint between the floor beam or the foundation and the column and / or the joint between the upper floor beam and the column. disposed projecting in a longitudinal direction one end side or both end sides of the Kaihari, pillars and the rigid connections, foundation, by a low junction structure with rotational stiffness close to the pin junction or pin junction with upper Kaihari and lower Kaihari It is configured to resist the external force acting on the frame by plastic deformation while maintaining the elasticity of the columns and beams.

  The present invention can maintain the elastic range of a column and a beam by configuring the joint hardware that joins the beam or the foundation and the column to yield before the column and the beam. There is no reinforcing material such as brace, and a wide opening can be secured.

  The joint hardware also serves as an elasto-plastic damper that utilizes energy absorption when the steel material is deformed beyond the elastic limit. For example, in addition to general steel materials such as steel plates, rolled H-shaped steels, welded H-shaped steels, low yield points It can be easily formed from steel or the like, and the yield strength can be set by adjusting the material, plate thickness, length, shape, etc. so as to yield before the columns and beams.

  Furthermore, the joint hardware can be quickly recovered after the disaster by being configured to be detachably attached to the column and the beam by end plate type bolt joint. In addition, by appropriately reinforcing each part as necessary, it is possible to control the collapse site, control the local buckling of the column flange, control the shear buckling of the column web, and control the rigidity of the entire member. it can.

  The framework of the rigid frame structure according to claim 2 is the framework of the rigid frame structure according to claim 1, wherein the lower floor beam or the foundation and the column and / or the upper floor beam and the column have low rotational rigidity close to the pin joint or the pin joint. It is characterized by being joined by a joining structure.

  The present invention reduces the bending moment acting on the beam or the foundation side by joining one of the upper end side or the lower end side of the column with the foundation or the beam by a joint structure with low rotational rigidity close to pin joining or pin joining. This makes it possible to reduce the cross section of the beam or foundation.

  In addition, as a joint structure with low rotational rigidity close to pin joint or pin joint, for example, there is a bolt joint or a drift pin joint. In addition, a joint structure using low-rigidity steel (low yield point steel) that is easily deformed by receiving a relatively small external force, and steel that is bent and deformed by receiving a relatively small external force (general steel) A joint structure using a pin can also be applied as a joint structure with low rotational rigidity close to that of pin joint or pin joint.

  The framework of the rigid frame structure according to claim 3 is the framework of the rigid frame structure according to claim 1 or 2, wherein the joint hardware is attached to one end side in the longitudinal direction of the lower floor beam and the upper floor beam of the column, and the opposite side thereof. Is characterized in that it is joined to the upper floor beam and the lower floor beam by a pin joint or a joint structure having a low rotational rigidity close to that of the pin joint.

  According to the present invention, a column and a beam or a foundation are joined with one or a plurality of joint hardware according to the scale of the framework and the magnitude of external force to be applied. One is enough.

  According to the present invention, the joint hardware for joining the beam or the foundation and the column is configured to yield before the column and the beam with respect to the external force such as seismic force. Further, the elastic range of the beam can be maintained, and there is no effect such that there is no reinforcing material such as braces in the frame, and a wide opening can be secured.

  In addition, the joint hardware can appropriately set the yield strength by adjusting the material, plate thickness, length, shape, etc. so that it yields before the columns and beams.

(A) is a partial perspective view which shows one Embodiment of the framework of the rigid frame structure which concerns on this invention, (b) is sectional drawing of the junction part of the pillar and upper floor beam which illustrated joint metal hardware concretely. . The behavior by the horizontal force of the frame of the rigid frame structure illustrated in FIG. 1 is shown, (a) is a front view showing a state before deformation, and (b) is a front view showing a state after deformation. It is a partial perspective view which shows one Embodiment of the frame of the ramen structure which concerns on this invention. FIG. 4 is a front view showing the behavior of the framework of the rigid frame structure shown in FIG. 3 due to horizontal force, where (a) shows a state before deformation and (b) shows a state after deformation. It is a partial perspective view which shows one Embodiment of the frame of the ramen structure which concerns on this invention. FIG. 6 is a front view showing the behavior of the framework of the rigid frame structure shown in FIG. 5 due to horizontal force, where (a) shows a state before deformation and (b) shows a state after deformation.

  1 and 2 (a) and 2 (b) show an embodiment of the framework of the ramen structure according to the present invention, in which reference numeral 1 is a column, 2 is a lower beam, and 3 is an upper floor. It is a beam. The lower end of the column 1 is joined to the upper surface of the lower floor beam 2, and the upper end of the column 1 is joined to the lower surface of the upper floor beam 3 via a plurality of joint hardware 4.

  The joint hardware 4 is provided in a projecting manner symmetrically across the column 1 at both ends in the longitudinal direction of the lower floor beam 2 and the upper floor beam 3 of the column 1. The joint hardware 4 has a predetermined length in the longitudinal direction of the lower floor beam 2 and the upper floor beam 3, and is integrally attached to the side portion of the column 1 by welding or the like.

  Further, the tip of the joint hardware 4 projecting from the lower end of the column 1 is joined to the upper surface of the lower floor beam 2 by a joint structure 5 having a low rotational rigidity close to pin joint or pin joint, and projecting to the upper end of the pillar 1. The tip of the joint metal fitting 4 provided is detachably attached to the lower surface of the upper floor beam 3 by a joint structure 5 having low rotational rigidity close to pin joint or pin joint. In any case, the joint hardware 4 is detachably attached to the lower floor beam 2 and the upper floor beam 3 by end plate type bolt joints.

  Furthermore, the column 1, the lower floor beam 2 and the upper floor beam 3 are all formed from a shape steel such as a rolled H-shaped steel or a welded H-shaped steel, or a steel pipe or a square steel pipe. In addition to this, it is made of a low yield point steel material.

  In addition, the material, plate thickness, length, shape, and the like of the joint metal fitting 4 are appropriately set so as to yield before the column 1, the lower floor beam 2, and the upper floor beam 3 with respect to an external force of a certain value or more. ing.

  FIG. 1 (b) shows an example of the joint hardware 4 more specifically, and includes a deformation panel 4a formed from a general steel material, a low yield point steel material, or the like, and deformed beyond the elastic limit. Are integrally coupled to the inside of the upper end of the column 1. Further, the other end side of the joint hardware 4 is coupled to the lower surface portion of the upper floor beam 3 by a coupling hardware 7.

  In this case, the connecting hardware 7 is CT steel formed by cutting off a flange on one end side of an H-shaped steel made of a general steel material, and is integrally formed with the flange 7 a bolted to the upper floor beam 3 and the joint hardware 4. When the web 7b forming the above is bent and deformed in the out-of-plane direction, the joint structure 5 having a low rotational rigidity close to the pin joint or the pin joint is configured.

  When the joint between the column 1 and the upper floor beam 3 is deformed by receiving an external force of a certain value or more, the deformed panel 4a yields before the column 1 and the upper floor beam 3, so that the column 1 and the upper floor beam 3 can be prevented in advance.

  With such a configuration, the joint between the column 1 and the lower floor beam 2 and the joint between the column 1 and the upper floor beam 3 constitute a rigid joint. Therefore, when a horizontal force P acts on the upper floor beam 3, a bending moment M acts on each joint portion between the column 1, the lower floor beam 2, and the upper floor beam 3. However, since the joint hardware 4 is formed so as to yield before the column 1, the lower floor beam 2 and the upper floor beam 3 with respect to an external force, the joint hardware 4 with respect to a bending moment M greater than a certain value. Resists horizontal force by plastic deformation. Therefore, the pillar 1, the lower floor beam 2 and the upper floor beam 3 are only elastically deformed, and are not destroyed after plastic deformation. Further, the plastically deformed joint metal 4 can be easily restored by replacing it.

  Particularly, the joint hardware 4 and the beams 2 and 3 on the upper and lower floors are joined by the pin joint or the joint structure 5 having low rotational rigidity close to the pin joint, so that the beams 2 and 3 on the upper and lower floors are intensively bent. I don't get it.

  3 and 4 (a) and 4 (b) show other embodiments of the present invention, and in particular, the lower end portion of the pillar 1 is a pin or a joint structure with low rotational rigidity close to the pin on the upper surface portion of the lower floor beam 2. 5 is joined. Moreover, the upper end part of the pillar 1 is joined to the lower surface part of the beam 2 via the some joint metal | hardware 4 so that it may demonstrate in embodiment of FIG.

  In such a configuration, the joint between the column 1 and the upper floor beam 3 constitutes a rigid joint and transmits a bending moment M to the horizontal force P. However, the joint between the column 1 and the lower floor beam 2 is The bending moment is not transmitted by being joined by the pin joint or the joint structure 5 having low rotational rigidity close to the pin joint.

  Further, the joint hardware 4 is formed so as to yield before the column 1, the lower floor beam 2 and the upper floor beam 3 with respect to external force, so that the joint hardware 4 with respect to a bending moment M greater than a certain value. 4 resists horizontal force P by plastic deformation.

  Therefore, the pillar 1, the lower floor beam 2, and the upper floor beam 3 are only elastically deformed, and are not plastically deformed to be destroyed. Further, the plastically deformed joint metal 4 can be easily restored by replacing it.

  5 and 6 (a) and 6 (b) also show other embodiments of the present invention, and the lower end of the column 1 is connected to the upper surface of the lower floor beam 2 by pin bonding or rotational rigidity close to pin bonding. Are joined by a joining structure 5 having a low height.

  Further, the upper end portion of the column 1 is joined to the lower surface portion of the upper floor beam 3 via a joint hardware 4, and is further directly connected to the lower surface portion of the upper floor beam 3 by the pin joint or the joint structure 6 having low rotational rigidity close to pin joint. It is joined.

  In this case, the metal joint 4 protrudes from the side of one end of the column 1 and its tip is joined to the lower surface of the upper floor beam 3 by pin joint or a joint structure 5 having low rotational rigidity close to pin joint. ing.

  Further, the joint structure 6 having a low rotational rigidity close to the pin joint or the pin joint for directly joining the upper end portion of the pillar 1 and the upper floor beam 3 is formed at the opposite end portion of the pillar 1 from which the fitting 4 is projected. Is provided.

  In such a configuration, the joint between the column 1 and the upper floor beam 3 constitutes a rigid joint and transmits a bending moment M to the horizontal force P. However, the joint between the column 1 and the lower floor beam 2 is The bending moment is not transmitted by being joined by a joint structure having low rotational rigidity close to pin joint or pin joint.

  Further, the joint hardware 4 is formed so as to yield before the column 1, the lower floor beam 2 and the upper floor beam 3 with respect to external force, so that the joint hardware 4 with respect to a bending moment M greater than a certain value. 4 resists horizontal force P by plastic deformation.

  Therefore, the pillar 1, the lower floor beam 2, and the upper floor beam 3 are only elastically deformed, and are not plastically deformed to be destroyed. Further, the plastically deformed joint metal 4 can be easily restored by replacing it.

  The present invention can resist external force in the elastic range of columns and beams against external force such as seismic force, and it can secure a wide opening without a reinforcing material such as braces in the frame. it can.

1 Column 2 Lower floor beam 3 Upper floor beam 4 Joint hardware 5 Joint structure with low rotational rigidity close to pin joint or pin joint 6 Joint structure with low rotational rigidity close to pin joint or pin joint

Claims (3)

In the framework of a rigid frame structure composed of a lower beam or foundation, an upper beam, and a column arranged between the lower beam or foundation and the upper beam, the joint between the lower beam or foundation and the column and A joint hardware for joining the column and the beam and / or the foundation is arranged at the joint between the upper floor beam and the column, and the joint hardware is one end side or both end sides in the longitudinal direction of the upper floor beam and the lower floor beam of the column. to be disposed to protrude, pillars and the rigid connections, foundation, the upper Kaihari and lower Kaihari joined by a low junction structure with rotational stiffness close to the pin junction or pin junction, and to an external force acting on the framework A frame having a rigid frame structure, which is configured to resist by being plastically deformed while maintaining the elasticity of the columns and beams.   The frame of the ramen structure according to claim 1, wherein the lower-level beam or foundation and the column and / or the upper-level beam and the column are joined by a pin joint or a joint structure having low rotational rigidity close to the pin joint.   The joint hardware is attached to one end in the longitudinal direction of the lower and upper floor beams of the column, and the opposite side is joined to the upper and lower floor beams by a pin connection or a joint structure with low rotational rigidity close to pin connection. The framework of the ramen structure according to claim 1 or 2, wherein

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