端部配置无黏结钢筋的钢板混凝土组合剪力墙抗震性能

为了提高钢板混凝土组合剪力墙的抗震性能和可恢复性能，提出一种端部配置无黏结钢筋的钢板混凝土组合剪力墙，通过无黏结高强钢筋为墙体提供恢复力。进行了4个剪跨比2.28的钢板混凝土组合剪力墙低周反复荷载试验，分析了端部配置无黏结高强钢筋对试件的破坏形态、滞回特性、承载力、变形能力、刚度退化、耗能能力和可恢复性能的影响。试验结果表明：端部配置无黏结钢筋的钢板混凝土组合剪力墙最终发生压弯破坏，破坏截面应变基本符合平截面假定；端部配置无黏结高强钢筋提高了钢板混凝土组合剪力墙的承载力、变形能力、初始刚度和耗能能力；在内置钢板混凝土组合剪力墙端部配置无黏结高强钢筋可减轻受压区混凝土的破坏程度，减小墙体残余变形和裂缝宽度，具有较好的可恢复性能。给出了端部配置无黏结钢筋钢板混凝土组合剪力墙的水平承载力计算方法，计算结果与试验结果符合较好，误差在15%以内。

Seismic behavior of steel plateconcrete composite shear walls with unbonded steel bars at the ends

In order to improve the seismic performance and resilient performance, a steel plate-concrete composite shear wall with unbonded steel bars at the ends was proposed, which provided the walls with restoring force through unbonded high-strength steel bars. The cyclic loading tests on four steel plate-concrete composite shear walls with a shear-span ratio of 2.28 were carried out. The influence of unbonded high-strength steel bars on the failure mode, hysteretic performance, bearing capacity, deformation capacity, stiffness degradation, energy dissipation capacity, and resilient performance of the specimens were analyzed. The results show that the failure mode of steel plate-concrete composite shear walls with unbonded steel bars at the ends is mainly bending failure. The failure section basically conforms to the assumption of the plane section. The bearing capacity, deformation capacity, initial stiffness, and energy dissipation capacity of the specimens are improved by using unbonded steel bars at the ends.The built-in steel plate concrete composite shear walls with unbonded steel bars at the ends can reduce the damage degree of concrete in the compression zone,residual deformation and crack width,which have good resilient performance. The theoretical calculation method was proposed. The calculated results are in good agreement with the test results, and the error is less than 15%.