（1 中国建筑西南设计研究院有限公司， 成都 610042；  2 中建科工集团有限公司， 深圳 518000）

［摘要］对一个位于9度区，高度为76.8m，采用钢框架-中心支撑体系的医院建筑进行了消能减震设计。对比分析了多遇地震与罕遇地震作用下该医院减震结构与非减震结构的地震响应。分析结果表明，地震作用下，设置的黏滞阻尼器滞回曲线饱满，耗散了大量地震输入结构的能量，减小了结构楼层剪力、层间位移角等参数的数值，改善了结构的损伤，提高了结构的抗震性能与安全储备，达到了预期的抗震性能目标。对消能子结构的节点区域进行了详细的有限元分析，结果表明，节点构造及承载力等满足要求。

［关键词］消能减震；  钢框架中心支撑；  黏滞阻尼器；  性能化设计； 消能子结构

中图分类号：TU318， TU352文献标识码：A文章编号：1002-848X(2020)19-0107-05

Energy dissipation analysis of a high-rise structure with steel frame-central brace in the 9-degree zone

WU Xiaobin1, PENG Zhizhen1, XU Kun2, LI Changhong1, ZHANG Xudong1, WANG Jianhu1,  WU Changgen2

（1 China Southwest Architectural Design and Research Institute Co., Ltd., Chengdu 610042, China；  2 China Construction Science and Industry Corporation Ltd., Shenzhen 518000, China）

Abstract:The energy dissipation design of a hospital building with a height of 76.8 meters in the 9-degree zone, which adopts steel frame-central brace, was carried out. The seismic responses of the shock-absorbing structure and non-shock-absorbing structure of the hospital under frequent earthquakes and rare earthquakes was compared and analyzed. The analysis results show that under the earthquake, the hysteresis curve of the set viscous damper is full and the set viscous damper dissipates a large amount of energy input to the structure by earthquake, which reduces the numerical value of the parameters such as the structural floor shear and interlayer displacement angle, improves structural damage, and improve the seismic performance and safety reserve of the structure, and achieve the expected seismic performance target. A detailed finite element analysis was carried out on the node area of the energy dissipation substructure, and the results show that the node structure and bearing capacity meet the requirements.

Keywords:nergy dissipation；  steel frame-central brace；  viscous damper；  performance-based design; energy dissipation substructure

作者简介：吴小宾，硕士，教授级高级工程师，一级注册结构工程师，Email:wumat@vip.sina.com。