Test device for simulating horizontal earthquake action of node in framework beam column

Abstract

The invention belongs to the field of civil engineering, and discloses a test device for simulating the horizontal earthquake action of a node in a framework beam column. The test device comprises a counter-force rigid frame fixedly connected to the ground. The counter-force rigid frame is of a stable frame structure formed by a vertical supporting frame and a transverse supporting frame. The column top of a beam column node test piece is provided with an axial pressure loading device capable of exerting the pressure on the column top, and the column bottom of the beam column node test piece is connected with the ground through two symmetrically-arranged column hinge supports. The axial pressure loading device is hinged to the transverse supporting frame. The test device further comprisesa reciprocating loading device capable of exerting a horizontal force on the beam column node test piece at the column end side surface above the beam. A connecting rod which is vertically arranged isarranged between the beam end of the beam column node test piece and the ground. The two ends of the connecting rod are hinged to the beam end and the ground through a hinge seat respectively. The column hinge support is of a vertical bent structure, and the first bending part of the column hinge support is connected with the ground. The second bending part is arranged towards the side face of the column end, and a cylindrical rod is clamped between the second bending part and the side surface of the column end. The two column hinge supports are fixed through a connecting piece. According tothe test device, the situation that the actual beam column node bears the horizontal earthquake action can be reflected more truly.

Description

Technical field [0001] The invention relates to the technical field of civil engineering, in particular, to a test device for simulating the bearing of horizontal seismic action on nodes in a frame beam-column. Background technique [0002] The frame structure not only has the advantages of flexible layout, good structural integrity and good rigidity, but also has good seismic performance, but also has the advantages of light weight, less consumables, and short construction period. [0003] The beam-column node refers to the node core area, the beam end near the node core area and the column end near the node core area in the frame structure. It is an important force transmission hub in the frame structure, which can transmit and distribute internal forces. It is generally more complicated than beams, columns, and slab members. The shear force it bears is about 4 to 6 times that of the column. The frame node is the weakest part of the frame structure. The damage of the frame node ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the research on the hysteretic performance of beam-column joints mainly adopts structural pseudo-static load tests, which can simulate the seismic performance of joint specimens under earthquake action. However, most of the pseudo-static tests adopt The loading method is column end loading, and the pseudo-static test of column end loading mainly studies the plastic hinge at the end of the column. The aseismic performance of the joint under the action of an earthquake cannot be fully demonstrated from a single aspect of the end of the column.

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