高轴压比下内置钢板高强混凝土组合剪力墙#br# 抗震性能试验研究

内置钢板混凝土组合剪力墙主要应用于超高层建筑结构中，是主要的抗侧力构件，其底部剪力墙往往承担巨大的竖向荷载，轴压比和混凝土强度是影响其抗震性能的主要因素。为研究内置钢板高强混凝土组合剪力墙在高轴压比下的抗震性能，进行2个剪跨比为2.28的组合剪力墙试件拟静力试验，设计轴压比分别为0.6和0.8，C70混凝土。研究组合剪力墙在低周反复荷载作用下的受力性能和破坏模式，分析轴压比对抗震性能的影响。结果表明：2个试件最终均发生压弯破坏，破坏截面基本符合平截面假定，滞回曲线均较饱满，耗能性能良好，同时具有比较稳定的水平承载力；随着轴压比增大，组合剪力墙的水平承载力、初始刚度和耗能能力增大，侧向变形能力有所降低，但屈服位移角仍大于1/120，极限位移角为1/46。研究可为内置钢板高强混凝土组合剪力墙的工程应用提供理论参考。

Experimental research on seismic performance of high-strength concrete composite#br# shear walls with built-in steel plates under high axial compression ratio

The built-in steel plate concrete composite shear wall is mainly used in super high-rise building structures, and is the main component to resist lateral force. The shear wall at the bottom often bears huge vertical load. Therefore, the axial compression ratio and concrete strength are the main factors affecting its seismic performance. In order to investigate the seismic performance of high-strength concrete composite shear walls with built-in steel plates under high axial compression ratio, two specimens with shear-span ratio of 2.28 were tested under cyclic loading. The designed axial compression ratio was 0.6 and 0.8, respectively, and the concrete was C70. The mechanical behavior and failure modes of the composite shear walls under cyclic loading were studied, and the influence of axial compression ratio on seismic performance was analyzed. The results indicate that two specimens suffered from compression bending failure, and the failure sections conform to the assumption of plane section. The hysteretic curves are full, the energy dissipation capacity is good, and the horizontal bearing capacity is relatively stable. With the increase of axial compression ratio, the horizontal bearing capacity, initial stiffness, and energy dissipation capacity of composite shear walls increase, while the lateral deformation capacity decreases, but the yield displacement drift is still greater than 1/120, and the ultimate displacement drift is 1/46. This study provides a theoretical reference for engineering application of high-strength concrete composite shear walls with built-in steel plates.