Abstract:
Based on the advantages of ordinary flat plate shear walls (FPSWs) and of corrugated plate shear walls (CPSWs), a new type of flat-corrugated plate shear wall (FCPSW) is proposed, in which the infill panel consists of two flat panels on both sides and a corrugated panel connected by bolts in the middle. A specimen of FCPSW with a width-to-height ratio of 1.5 was designed and tested by cyclic loading, and the lateral performance, failure mode and, the collaborate lateral resistant mechanism between the flat and corrugated panels were revealed. The finite element method (FEM) was utilized to simulate the test, in which the lateral performance of FCPSWs was improved by applying the gasket plates to the bolt connection. Meanwhile FCPSWs were compared with the corresponding FPSWs and CPSWs pertaining to the lateral resistant behaviour. The wall-frame interaction in FCPSW system was investigated, including the additional bending moment to the boundary frame, the flexural rigidity requirement for the boundary frame columns, and the effect of vertical load. The test results show that: although multi-wave buckling occurred over the outer flat panel, and some bolts were detached from the panel, the lateral resistance of FCPSWs was still stable even with the storey drift angle increased to 5%. Comparison by FEA of different types of shear walls shows that: due to the interactive restraint between the flat panels and the corrugated panel, both buckling and deformation of the infill panel in FCPSWs are significantly reduced, which consequently results in high initial lateral stiffness and stable post-buckling resistance and reduces pinching in the hysteresis curve. The wall-frame interaction analysis shows that: due to the out-of-plane buckling of the flat panel and the corrugated panel being restrained, the additional bending moment acting on the boundary frame of FCPSWs is remarkably decreased. Generally, FCPSWs achieve a good lateral performance, and with flexural rigidity requirement less than that of the corresponding FPSWs, the vertical load effect is also less significant than that of the FPSW or that of CPSW counterparts.