受拉工况下新型装配式剪力墙抗震模拟分析

Seismic Simulation Analysis of a New Type of Prefabricated Shear Wall under Tensile Conditions

预制装配式剪力墙结构的冷缝一直是该类结构的薄弱点,对结构抗震性能的影响很大,文章提出了一种新型改进架空连接预制装配式剪力墙结构。为了研究该新型架空连接预制装配式剪力墙结构的抗震性能,设计了5个不同连接方式的模型,用于对比在轴向受拉状况下装配式剪力墙的抗震性能,针对数值模拟结果,分析了不同连接方式试件的滞回曲线、刚度曲线、耗能能力及破坏云图。研究结果表明:预制装配式改进架空连接的剪力墙结构在轴向受拉状况下,内置角钢抗剪连接件能有效地防止冷缝发展成为裂缝,提高了冷缝处的抗剪能力,有效提高了构件的耗能能力,塑性区面积明显增大,抗震性能增加。

Cold joints in prefabricated shear wall structures have always been the weak point of this type of structure,which has a great impact on the seismic performance of the structure,for this reason,the paper proposes a new type of improved overhead connection prefabricated shear wall structure.To study the seismic performance of this new overhead connection prefabricated shear wall structure,five models with different connection modes are designed to compare the seismic performance of the prefabricated shear wall under axial tension conditions,and the hysteresis curve,stiffness curve,energy dissipation capacity,and damage cloud of specimens with different connection modes are analyzed in terms of the numerical simulation results.The results show that when the prefabricated shear wall structure with improved overhead connection is under axial tensile conditions,the built-in angle steel shear-resistant connectors can effectively prevent the cold joints from developing into cracks,improve the shear capacity at the cold joints,effectively improve the energy dissipation capacity of the members,and the area of the plastic zone is obviously increased,and the seismic performance is increased.