PBEE框架下基于IDA方法的超高层耗能结构地震易损性分析  

Seismic vulnerability analysis of energy-consuming super-tall structures under PBEE framework using IDA method

作　　者：聂红鑫 曹宝珠[2] 于莹 王巍 Nie Hong-xin;Cao Bao-zhu;Yu Ying;Wang Wei(Civil Engineering College,Jilin University of Architecture and Technology,Changchun 130114,China;College of Civil Engineering and Architecture,Hainan University,Haikou 570228,China;Jilin Construction Engineering Group Co.Ltd,Changchun 130052,China)

机构地区：[1]吉林建筑科技学院土木工程学院,吉林长春130114 [2]海南大学土木建筑工程学院,海南海口570228 [3]吉林建工集团有限公司,吉林长春130052

出　　处：《工程抗震与加固改造》2022年第3期15-22,14,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51368016);吉林省教育厅科学研究项目(JJKH20221213KJ)。

摘　　要：超高层建筑在我国应用广泛,其地震安全性将直接影响人们的生命安全以及财产损失。本文选取该类建筑典型结构形式即框架-核心筒结构,针对地震破坏集中位置,结合耗能型连梁构造对该类结构进行减震设计。利用增量动力分析(IDA)方法,结合PBEE思想,从建筑使用功能的角度,对经减震设计前后的结构进行地震易损性分析,得到IDA曲线簇、易损性矩阵、震害矩阵。结果表明,耗能型连梁可减轻结构20%~30%的层间变形;未经减震设计的结构基本满足在小震时处于基本可使用状态、在中震时处于基本可使用和修复后使用状态、在大震时基本不发生倒塌,但在遭遇巨震时存在接近倒塌状态的大概率风险;经过本文减震设计的耗能结构,有效提升了结构遭遇小震、中震及大震时性能水准,特别是减小了结构遭遇巨震时发生倒塌的风险概率,极大程度地保证结构的地震安全性和使用功能性。Super high-rise buildings are widely used in China, and the earthquake damage directly affects people’s life safety and property loss. According to the location of damage, this kind of structure is designed with energy dissipation coupling beam. Considering the PBEE theory, IDA method is used to analyze the seismic vulnerability of the structure for the using function. IDA curve cluster, vulnerability matrix and earthquake damage matrix are obtained. The results show that: the energy dissipating coupling beam can reduce the 20%~30% deformation between layers;the structure without shock absorption design basically meets the performance level that in small earthquake basically the structure can be used, in moderate earthquake the structure can be repaired for use and can be used, in large earthquake basically the structure does not collapse, but there is a large probability risk of collapse in great earthquake;the energy-dissipating structure designed in this paper effectively increases the performance level under small, moderate and large earthquakes, especially alleviates the risk of collapse during great earthquakes, and improves the function of the structure.

关 键 词：耗能结构 增量动力分析 超高层结构 性能水准 地震易损性 

分 类 号：TU973[建筑科学—结构工程]