考虑多块混凝土板拼装的组合钢板剪力墙抗震性能试验研究

Experimental study on the seismic behaviors of composite steel plate shear walls with assembled multi-concrete slab

传统组合钢板剪力墙采用单块混凝土板拼装,其尺寸较大,运输吊装困难,考虑将单块改为多块预制混凝土板,进而提出了多块混凝土板拼装的组合钢板剪力墙。设计制作了竖向拼装组合钢板剪力墙、横向拼装组合钢板剪力墙及传统组合钢板剪力墙共3个缩尺比为1/3的组合钢板剪力墙试件,开展了低周反复荷载试验,对比研究了各试件的破坏特征、滞回性能、位移延性、耗能能力及刚度退化等抗震性能。结果表明:混凝土板分块布置会一定程度地降低组合钢板剪力墙的抗侧刚度和耗能能力,但可以减少内藏钢板对边缘框架柱产生附加弯矩的不利影响;竖向拼装组合钢板剪力墙呈弯剪破坏形式,属于延性破坏,横向拼装组合钢板剪力墙在预制板间横向拼缝处撕裂破坏,呈现较为明显的剪切型破坏特征;横向和竖向两种拼装方式中,竖向拼装组合钢板剪力墙延性系数略小,但其他抗震性能指标如耗能能力、承载能力、刚度等均更为优越。

A traditional composite steel plate shear wall is assembled with single concrete slab,which has larger dimensions and is difficult for lifting and transporting.The single concrete slab was replaced by multi-precast concrete slab in this paper,and the composite steel plate shear wall with assembled multi-concrete slab was proposed.Three 1/3 scaled composite steel plate shear wall specimens were made:The composite steel plate shear wall with vertical assembling mode(V-CSPSW),composite steel plate shear wall with horizontal assembling mode(H-CSPSW)and traditional composite steel plate shear wall(CSPSW).The cyclic loading tests on specimens were performed.The failure characteristic,hysteretic behavior,ductility,energy dissipation capability and stiffness degradation were investigated.The test results show that the CSPSW with assembled multi-concrete slab has lower lateral stiffness and energy dissipation capacity,but it can reduce the harmful effects of the additional moment on frame columns that the steel plate generates.The V-CSPSW presents bending-shear failure mode,which is ductile failure.The tearing failure appears in the horizontal gaps that between the precast concrete slabs of the H-CSPSW,it presents obvious shearing failure mode.Comparing the horizontal and vertical assembling modes,the ductility coefficient of V-CSPSW is smaller,but other seismic performance indexes such as the energy dissipation capacity,bearing capacity and stiffness are more superior.