多块混凝土板拼装组合钢板剪力墙试验与有限元参数影响研究

EXPERIMENTAL AND ANALYTICAL STUDY OF COMPOSITE STEEL PLATE SHEAR WALL WITH ASSEMBLED MULTI-CONCRETE SLAB

对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开展拟静力试验,对比分析各试件破坏特征、滞回性能、耗能能力、刚度退化及位移延性,采用ABAQUS软件建立数值模型并针对不同拼缝宽度、螺栓距厚比和混凝土板厚度的竖向拼装组合钢板剪力墙进行了参数影响研究。结果表明:混凝土板分块布置会一定程度地降低其耗能能力和抗侧刚度,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是一种抗震性能更为优越的抗侧力构件,竖向拼装组合钢板剪力墙的耗能能力是横向拼装组合钢板剪力墙的1.3倍,且竖向拼装组合钢板剪力墙刚度退化相对缓慢;为保证组合钢板剪力墙具有较好的抗侧能力,螺栓距厚比为100和125时,其拼缝宽度分别不宜大于48 mm和72 mm;混凝土板约束刚度足够情况下,螺栓距厚比不宜大于125。

The quasi-static test was carried out on 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 failure characteristic,hysteretic behavior,energy dissipation capability,displacement ductility,stiffness degradation and displacement ductility of the composite walls were analyzed.The numerical model was established by using ABAQUS,and a parametric study was then performed to study the effects of gap width,bolt spacing-to-steel thickness ratio and concrete slab thickness.The results show that the CSPSW assembled by multi-concrete slabs has lower lateral stiffness and energy dissipation capacity,but it can reduce the harmful effects of additional moment generated by the steel plate on frame columns.V-CSPSW is a lateral force resisting member possessing superior seismic performance,its energy dissipation capacity is 1.3 times of that the H-CSPSW has and its stiffness degradation is slower.In order to ensure the composite steel plate shear wall has good lateral resisting capacity,the gap width should be less than 48 mm and 72 mm if the bolt spacing-to-steel thickness ratio is 100 and 125,respectively.The bolt spacing-to-steel thickness ratio of the V-CSPSW should be less than 125 if the concrete slab possesses enough restraint stiffness.