连梁参数对双肢剪力墙的影响

Impacts of Coupling Beams Parameters on Coupled Shear Walls

为了研究连梁参数对钢筋混凝土双肢剪力墙承载力及变形的影响,本文利用可靠的非线性有限元方法对10片连梁参数设置不同的钢筋混凝土双肢剪力墙进行模拟分析,并考察各连梁参数对双肢剪力墙承载力及变形的影响。结果表明,对于跨高比较大(L/hb≥3.0)的连梁,按结构分析软件计算得到的配箍基本上能满足延性连梁的设计要求;而对于跨高比较小(2.0≤L/hb<3.0)的连梁,按结构分析软件计算得到的配箍存在不足,应适当增加连梁的箍筋配置来提高连梁的延性。由于连梁跨度变化对剪力墙整体系数的影响没有高度变化时大,在设计允许的条件下,适当增加连梁的跨度,可以加大连梁的跨高比,提高连梁的延性,降低连梁的配箍要求,又不会对双肢剪力墙的承载力产生太大的影响。

In order to study the impact of the coupling beams parameters on the shear wall capacity and deformation, a reliable nonlinear finite element method was applied to simulate 10 coupled shear walls with different coupling beams, and the impacts of the beams parameters on the capacity and deformation of coupled shear walls were studied. The results show that for large span-to-depth ratio(2.0≤L/hb<3.0) of the coupled beams, the calculated stirrups obtained by structural analysis software can basically meet the design requirements of ductile coupled beams;while for small span-to-depth ratio(L/hb≥3.0) of the coupled beams, the calculated stirrups obtained by structural analysis software are inadequate, and the stirrups should be increased to improve the ductility of coupling beams. The change of the beam span has less influence on the integrated coefficient than the change of the beam depth. If the design conditions permit, to appropriately increase the coupling beams span can increase the span-to-depth ratio of the coupling beams, improve the ductility of coupling beams, reduce requirements for coupling beams stirrups and does not have a significant impact on the bearing capacity of coupled shear walls.