装配式两边连接钢板剪力墙节点抗侧性能试验研究与分析

为了将钢板剪力墙体系与新型全装配式钢结构体系结合起来,提出了一种适用于装配式高层钢结构的两边连接间断式盖板钢板剪力墙连接节点(discontinuous cover-plate connection,DCPC),并对此节点的构造与设计方法进行了研究.通过改变内嵌墙板厚度、连接螺栓数目及接触面摩擦因数设计加工了4组试件,并对其进行了静力加载试验和有限元分析对比.研究表明:增加螺栓个数可有效提高试件的滑移荷载,有效提高节点初始刚度,但增大了节点连接螺栓的预紧力损失,同时连接盖板与底板的残余变形也较大;增大试件接触面的摩擦因数可有效增大试件的极限抗侧承载力,但对螺栓预紧力的影响不大;螺栓预紧力的损失量随着内墙钢板的宽厚比和有效高跨比的减小而增大;内嵌墙板在破坏前拉力带充分发展,位移延性系数满足抗震设计要求,属于延性破坏;DPCP不仅具有良好的传力性能,而且便于加工与装配,同时保证了装配式钢板剪力墙的震后可修复功能.

Research and Analysis of the Lateral Performance of the Prefabricated Steel Plate Shear Wall Connection

In order to combine the steel plate shear wall system with new prefabricated steel structure system, a discontinuous cover-plate connection ( DCPC ) was proposed for a prefabricated steel plate shear wall with a beam-only-connected infill plate. The structure and design method of DCPC was studied. The static loading tests and finite element analyses ware carried out on four 1/3 scale specimens that were designed and manufactured by changing the thickness of the infill plate, the number of the connecting bolts and the friction coefficient of the contact surface. The results show that increasing the number of bolts can effectively improve the slipping load and the initial stiffness of the specimens, but can increase the loss of pre-tightening force on bolts and the residual deformation of the cover plate and the bottom plate. Larger friction coefficient can effectively increase the ultimate lateral capacity force of the specimens, but have little effect on the pre-tightening force of bolts. The loss of pre-tightening forceon bolts increases with the increasing of width-thickness ratio and the effective height-span ratio of the infill plate. The tension fields of the infill plates are fully developed before failure, the displacement ductility coefficients satisfies the seismic design requirements, and the failure of specimens belongs to the ductile failure. DPCP not only has good mechanical properties, but also is easy to be manufactured and assembled, and it can ensure the repairable function of the steel plate shear wall after earthquake.