不同连接的暗柱预制空心剪力墙抗震性能

Seismic Behavior of Precast Hollow Shear Walls with Boundary Columns Connected by Different Connections

为探索高效合理的暗柱预制空心剪力墙连接方式,解决连接施工和质量检验困难的问题,提出了3种水平接缝连接方式:暗柱通过竖向附加钢筋贯通连接、U形钢筋间接搭接及钢节点连接.通过3个暗柱预制空心剪力墙和1个现浇空心剪力墙的拟静力试验,研究了各试件的抗震性能与水平缝工作性能.结果表明,各试件均呈现压弯破坏特征,实现了预期的强剪弱弯目标.预制试件的延性系数在4左右,与现浇试件相比,各预制试件耗能与变形能力稍弱.各预制试件极限位移角为1/56~1/67,弹塑性变形能力满足现行规范要求.试件水平接缝处易形成贯通裂缝,但水平抗剪构造可满足抗剪需求.分析了基于规范计算试件抗弯承载力的适用性,并提出了考虑水平缝影响的抗弯承载力计算方法.

To explore efficient and reasonable connection forms of precast hollow shear walls with boundary columns,and to address the challenges of connection construction and quality inspection,three horizontal seamconnections(boundary column connection by vertical additional steel bars,indirect lapping connection of Ushaped steel bars,and steel joint connection)were proposed.Quasi-static tests were carried out on three hollow shear walls with precast boundary columns,along with a cast-in-place hollow shear wall,to study the seismic and working performance of these connections.The results showed that the specimens exhibited a compression-bending failure mode,successfully achieving the expected“strong shear weak bending”behavior.The ductility coefficient of precast specimens was around 4.Compared with the cast-in-suit specimen,the energy dissipation capacity and deformation capacity of each precast specimen were slightly weaker.The limit drift ratio of the precast specimen was between 1/56 and 1/67,and the elastic-plastic deformation capacity met the requirements of the current code.Through-cracks were easy to form at the horizontal seam,but the horizontal shear configuration can meet the code requirements.The applicability of calculating the bearing capacity of the specimen based on the code was analyzed,and a calculation method considering the influence of horizontal seam was proposed.