SEISMIC PERFORMANCE ANALYSIS OF ANCHORING PREFABRICATED WALL-BEAM JOINT OF STEEL TUBE BUNDLE COMPOSITE SHEAR WALL STRUCTURE
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摘要: 为解决钢管束组合剪力墙结构现有墙-梁节点焊接量大的问题,提出一种钢管束组合剪力墙结构锚固装配式墙-梁连接节点,并利用有限元软件ABAQUS对节点的破坏模式、内力分布以及端板厚度、锚固长度和混凝土强度等级对节点抗震性能的影响规律进行研究。结果表明,钢管束组合剪力墙结构锚固装配式墙-梁连接节点滞回曲线饱满,具有良好的延性和耗能能力;端板厚度对节点的承载能力和抗震性能影响较小;随着锚固长度增加,节点抗震性能增强,承载力明显增加,但当锚固长度达到800 mm后,节点抗震性能和承载力均不再有明显改变;随着混凝土强度等级的增加,对节点的抗震性能影响较小;预埋件的承载能力逐渐由栓钉尾部混凝土局部抗压承载力控制转化为由栓钉的抗剪承载力控制。Abstract: In order to solve the problem of large amount of spot welding on existing wall-beam joints of steel tube bundle shear wall structure, a new type of anchoring prefabricated wall-beam joint for steel tube bundle shear wall structure was preposed. The failure modes, internal force distribution and the influence of plate thickness, anchorage length, and concrete strength grade on the seismic performance of the joint were studied by using the finite element software ABAQUS. The results showed that the hysteretic curve of the joint was full, showing good ductility and energy dissipation capacity. With the increase of the end plate thickness, the bearing capacity and seismic performance of the joint did not change significantly. With the increase of the anchorage length, the seismic performance of the joint was enhanced, and the bearing capacity increased significantly. However, when the anchorage length was 800 mm, the seismic performance and bearing capacity of the joint did not change significantly. With the improvement of concrete strength grade, the bearing capacity of the joint was less affected and gradually transformed from the local compressive bearing capacity of the concrete of the stud tail to the shear bearing capacity of the studs.
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