（1 广州大学土木工程学院， 广州 510006； 2 华南理工大学土木与交通学院,  广州 510640；3华南理工大学亚热带建筑科学国家重点实验室, 广州 510640）

［摘要］为了控制剪力墙尤其是核心筒剪力墙由于高宽比较小，地震作用下剪力墙底部损伤严重，提出带分离式软钢耗能器开缝组合墙，研究表明带软钢耗能器开缝组合墙是以弯曲破坏为主、延性较好的抗侧力构件。以一典型框架-核心筒高层结构为研究对象，以带软钢耗能器开缝组合墙替代部分传统剪力墙，从结构整体响应、构件材料损伤、结构耗能、地震易损性等方面对比组合墙结构与传统低矮剪力墙结构的抗震性能差异。分析结果表明：带软钢耗能器开缝组合墙核心筒结构与普通核心筒结构抗侧刚度相当。强震作用下，与普通剪力墙核心筒结构相比，开缝组合墙核心筒结构的底层剪力墙耗能减少44%，核心筒混凝土最大压应变下降29%，避免了结构出现严重损伤，显著降低了耗能过于集中底层剪力墙。对比两结构地震易损性，开缝核心筒结构在轻微损伤、中度损伤、严重损伤三个性能水准下的超越概率比普通核心筒结构分别下降了9.22%，65.24%，84.59%。研究证明了在高烈度区，以带软钢耗能器开缝组合墙替代核心筒结构剪力墙，可以有效解决强震作用下核心筒底部剪力墙损伤严重问题，框架-核心筒结构可以获得更高性能水准。

［关键词］核心筒结构； 开缝耗能组合墙； 软钢耗能器； 结构损伤； 耗能控制

中图分类号：TU973+.19文献标识码：A文章编号：1002-848X(2020)14-0110-06

Study on seismic performances of slit composite shear wall core tube structures with separated mild  steel dampers

WU Yi1, YANG Chun2,3, HUANG Zuhuan1, CHEN Lin1, ZHANG Chunmei1

(1 School of Civil Engineering, Guangzhou University， Guangzhou 510006，  China；2 School of Civil Engineering and Transportation， South China University of Technology， Guangzhou 510640，  China；3 State Key Laboratory of Subtropical Building Science， South China University of Technology， Guangzhou 510640，  China.)

Abstract:In order to control serious damage of bottom shear walls especially core tube shear walls due to small shear-span ratio under earthquake actions, slit composite shear wall with separated mild steel dampers was proposed. Researches showed that new slit composite shear walls, as lateral resisting components, are of flexural failure pattern and good ductility. A typical frame-core tube high-rise structure was selected, and parts of shear walls were substituted by new slit composite shear walls. Seismic performances including integral seismic responses, material damage of components, structural hysteretic energy and seismic fragility of normal shear wall core structure and new slit composite shear wall core structure were compared. Results showed that no obvious difference of lateral stiffness of two structures could be found. Under strong earthquake actions, compared to normal shear wall core tube structure, hysteretic energy of bottom shear wall of new composite shear wall structure reduce by 44%, the maximum compressive strain of concrete decrease by 29%, so serious structural damage and concentration of hysteretic energy at bottom layer are avoided. Comparing seismic fragility of the two structures, according to three performance levels, mild damage, moderate damage and serious damage, the exceedance probability of new composite shear wall structure decrease by 9.22%, 65.24% and 82%, respectively. Therefore, in highly seismic area, slit composite shear wall with separated mild steel dampers could be a good substitute for normal shear wall for high-rise core tube structure, damage concentration at bottom core shear wall can be effectively controlled, higher performance level can be achieved.

Keywords:shear wall core tube structure； slit composite shear wall with dampers； mild steel damper； structural damage； control of  energy dissipation

作者简介：吴轶，博士，教授，Email:77085703@qq.com。