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为研究小剪跨比内置钢管组合剪力墙(STLW剪力墙)的抗震性能,对STLW剪力墙试件进行低周反复加载试验,分析其破坏形态、破坏机理、变形能力、耗能性能、刚度及承载力退化规律.然后,采用拉压杆-滑移模型对STLW剪力墙的承载力进行分析.试验结果表明,在水平荷载作用下,STLW剪力墙由整截面墙渐变为开竖缝剪力墙,有效避免了小剪跨比钢筋混凝土剪力墙发生脆性剪切破坏.与传统小剪跨比剪力墙相比,STLW剪力墙的变形能力及耗能性能显著提高.经合理设计,其极限位移可提高约50%,黏滞阻尼系数提高约2倍.STLW剪力墙承载力计算值与试验结果较符合,拉压杆-滑移模型能较好地反映STLW剪力墙受力机理.
In order to study the anti-seismic performance of STLW shear wall with small shear-span ratio, the test results of the failure mode, failure mechanism, deformation capacity and energy dissipation of STLW shear wall specimens , The stiffness and the degradation of the bearing capacity.And then, the bearing capacity of the STLW shear wall is analyzed by using the tension-compression rod-slip model.The experimental results show that under the horizontal load, the shear wall of the STLW gradually changes from open to full The slitted shear wall effectively avoids the brittle shear failure of RC shear walls with small shear spans.Compared with the traditional small shear-to-shear wall, the deformation capacity and energy dissipation performance of STLW shear walls are significantly improved. With proper design, the ultimate displacement can be increased by about 50% and the viscous damping coefficient can be increased by about 2. The calculated value of the bearing capacity of STLW shear wall is in good agreement with the test results, and the tension-compression rod-slip model can better reflect the STLW shear Force wall stress mechanism.