往复加载下十字加劲波纹钢板剪力墙的滞回性能分析

Hysteresis Performance Analysis of Shear Wall with Cross-Stiffening Corrugated Steel Plate under Cyclic Loading

作为抗侧体系,波纹钢板剪力墙结构是一种通过利用内嵌钢板墙形成用来增强性能的钢板剪力墙结构体系。波纹钢板剪力墙与平钢板剪力墙相比,其侧向刚度、承载能力及耗能能力均更优秀,但在加载后期,其平面外变形过大,应力分布不均匀,导致结构承载力和刚度严重退化。为有效缓解上述缺陷,提出一种十字加劲波纹钢板剪力墙结构,十字加劲肋的存在,可以有效约束内嵌波纹钢板的平面外变形,在加载中后期,结构滞回环饱满,耗能能力较无十字加劲波纹钢板更加优秀,并有效减缓了波纹钢板剪力墙出现的承载力和刚度退化明显的现象。利用ABAQUS软件,通过改变波纹板厚度和加劲肋宽度两个参数进行有限元模拟分析,最终经过对比分析,发现波纹板厚度对结构有明显作用,而加劲肋宽度则影响较小,同时给出建议,当波纹板厚度取值为1.8~2.0 mm,即对应的柱墙刚度比为22.34~24.83,十字加劲肋宽度取值为40~60 mm,即对应的肋板刚度比为0.28~0.93时,这样的波纹钢板剪力墙结构性能相对更好。

As a lateral-resisting system,corrugated steel plate shear wall structure is a steel plate shear wall structure system formed to enhance performance through the use of embedded steel plate walls.Compared with shear wall of flat steel plates,shear wall of corrugated steel plates has better lateral stiffness,bearing capacity and energy dissipation capacity.However,at the later stage of loading,its out-of-plane deformation is too large and the stress distribution is not uniform,leading to significant degradation of structure bearing capacity and stiffness.To effectively relieve the above defects,a cross bracing corrugated steel plate shear wall structure is proposed in this paper,cross the existence of stiffening rib,can effectively constraint the out-of-plane deformation of embedded corrugated steel plate during the loading,the hysteresis loop is full and energy dissipation capacity is better than one without cross-stiffener corrugated steel plate.Decrease of the bearing capacity and stiffness is greatly mitigated.Based on ABAQUS,by changing the thickness of corrugated plate and stiffener width in finite element simulation analysis,comparison resucts show that corrugated platethickness has a great effect on structures,while the stiffener width has a minor effect.Suggestions are given at the same time,when corrugated plate thickness values from 1.8 mm to 2.0 mm,which corresponds to the strffness ratio of column wall ratio of 22.34~24.83,cross stiffener width values of 40~60 mm,namely the corresponding floor stiffness ratio is 0.28~0.93,the performance of corrugated steel plate shear wall structure is relatively better.