带自复位耗能连梁的剪力墙结构的抗震性能

为了减小强地震作用下钢筋混凝土联肢剪力墙的连梁结构损伤，实现震后结构功能的快速恢复，提出了一种兼具自复位和耗能功能的新型自复位耗能连梁。新型自复位耗能连梁在跨中安装了由形状记忆合金绞线和粘弹性耗能单元并联而成的新型复合自复位阻尼器。以一榀10层双肢剪力墙结构为例，对连梁跨中分别安装该新型自复位阻尼器的联肢剪力墙、粘弹性阻尼器的联肢剪力墙和普通钢筋混凝土连梁的联肢剪力墙进行了动力时程分析，对比分析了不同阻尼器对联肢剪力墙结构的减震效果。结果表明：地震作用下，结构变形和耗能都集中在连梁阻尼器上，但新型自复位连梁阻尼器对结构地震响应的控制效果要优于粘弹性阻尼器，新型复合连梁阻尼器在地震过程中表现出较好的自复位及耗能能力。

Seismic performance of shear wall structure with self-centering energy-dissipating coupling beam

In order to reduce the damage of the coupling beams in the coupled reinforced concrete shear wall structure under strong earthquake, realizing the rapid recovery of the structural function after earthquake, a new hybrid damping coupling beam with self-centering and energy dissipation functions were proposed. An innovative composite self-centering damper composed of shape memory alloy strands and viscoelastic damping devices was installed in the middle span of the innovative self-centering energy-dissipating coupling beam. A 10-layer coupled shear wall structure was taken as an example. The dynamic time history analysis on the coupled shear walls with the innovative self-centering damper, viscoelastic damper and common RC coupling beam, respectively, were conducted to investigate the seismic response mitigation effect of different damper on the shear wall structure. The calculation results show that the deformation and energy dissipation of the structure are concentrated on the coupling beam damper under the actions of earthquake, while the new self-centering coupling beam damper has better control effect than the viscoelastic damper for the seismic response of the structure, exhibiting excellent re-centering and energy dissipation capacities during the earthquakes.