带可更换阻尼器的竖向波形钢板剪力墙及组合墙抗震性能试验对比研究

Experimental study on seismic performance of vertical corrugated steel shear wall and composite wall with replaceable damper for contrast

为研究一种新型带有可更换阻尼器的波形钢板剪力墙及组合剪力墙的抗震性能,对该波形钢板剪力墙及组合剪力墙试件进行低周往复初次加载及阻尼器更换后二次加载.从试件的抗侧承载力、变形和耗能能力、破坏形态,阻尼器的变化等方面,对波形钢板剪力墙和组合剪力墙进行了相互对比,及各自加载前后的自身对比.分析了新型剪力墙试件变形和耗能能力,承载力退化,刚度退化的情况.研究结果表明:钢板剪力墙与组合剪力墙在初期加载时滞回曲线几乎重合,抗震性能接近.更换阻尼器二次加载时,钢板剪力墙初次屈曲部位在加载过程中发生应力集中,变形持续加剧,引起结构承载力严重劣化.而组合剪力墙因钢板外混凝土的包裹,初次加载中未发生屈曲,更换墙趾耗能构件后剪力墙整体抗震性能有一定提升.

In order to study the seismic performance of a new type of corrugated steel plate shear wall and composite shear wall with replaceable damper,the low-cycle reciprocating primary loading and secondary loading of the corrugated steel plate shear wall and composite shear wall specimens had carried out.From the aspects of lateral bearing capacity,deformation and energy dissipation capacity,failure mode and damper change,the corrugated steel plate shear wall and composite shear wall were compared with each other,and the self-comparison before and after loading was made.The deformation,energy dissipation,bearing capacity degradation and stiffness degradation of the new shear wall specimens are analyzed.The results show that the hysteresis curves of the steel plate shear wall and the composite shear wall almost coincide with each other at the initial loading stage,and their seismic performance is consistent.When the damper is replaced for the second loading,the initial buckling position of the steel plate shear wall experiences stress concentration during the loading process,and the deformation continues to aggravate,resulting in serious deterioration of the structure′s bearing capacity.However,the composite shear wall is not buckled in the initial loading due to the support package of concrete outside the steel plate,and the seismic performance of the shear wall as a whole is improved after replacing the toe energy-dissipating members.