钢连梁-部分外包组合剪力墙弱节点抗震性能研究

Subjects: Mechanics >> Basic Mechanics submitted time 2023-04-24 Cooperative journals: 《应用力学学报》

贺小刚 石韵 苏明周 陈锘

Abstract：
In order to study the seismic performance of weak joints of steel coupling beam-partially enclosed composite shear wall,a model specimen of the steel coupling beam-partially enclosed composite shear wall was designed,and the low-cycle reciprocating loading numerical simulation was carried out through the finite element software ABAQUS.The influences of factors such as concrete strength,the details horizontal stiffener and vertical stiffener,and span-to-height ratio of connecting beams on the seismic performance of joints are studied.The analysis results show that the steel coupling beam-partially enclosed composite shear wall joint has excellent seismic performance,the hysteretic curve is full and stable,the displacement ductility coefficient is greater than 3,the limit angle of the beam end of some specimens can reach 0.05 rad,and the specimen ductility is good.The increase of concrete strength can improve the initial stiffness of joint specimen.The setting of horizontal stiffeners and vertical stiffeners improves the restraint effect on the wall concrete and can effectively prevent the crack propagation speed.The setting of stiffener is an effective way of stress transfer in the joint area,which enables the stress in the joint area to be smoothly transferred to the adjacent area,reduces the load drop speed in the later stage of loading,and improves the seismic performance of the joint as the span-to-height ratio of the connecting beam increases When the span-to-height ratio of the connecting beam is greater than 3.8,the limit angle of the beam end is reduced from 0.05 rad to 0.03 rad.

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