摘要
采用有限元分析软件MSC.MARC对一复杂高层建筑建立了三维结构抗震弹塑性数值分析模型。该建筑由顶部棚架将下部双塔楼相连,形成高位连体结构。对于顶部棚架与下部双塔楼之间的连接,分别考虑设置铰支座的强连接和设置摩擦摆支座的弱连接两种不同方案。基于多条地震波,考虑不同地震输入工况,对两种不同连接方案下的结构模型进行了罕遇烈度三向地震作用下的弹塑性时程分析,考察了结构层间位移角、基底总剪力、棚架-塔楼连接支座反力等宏观结果,并校核了结构各构件的微观损伤破坏状态,评价其抗震性能水准。最后,通过比较高位连体连接部位的受力性能,体现了弱连接方案优势,且经过计算分析,摩擦摆支座最大支座反力和滑移量可以满足工程设计要求。
A three-dimensional elastic-plastic numerical seismic analysis model of a complex high-rise building was established by using the finite element analysis software MSC.MARC.The lower twin towers are connected by a top scaffolding to form a high-position connected structure.For the connection between the top scaffolding and the lower twin towers,two different schemes were considered:strong connection with hinge supports and weak connection with friction pendulum supports.Based on multiple seismic waves,different seismic input working conditions were considered,the elastic-plastic time-history analysis of the structural models were carried out on two different connection schemes under the three-dimensional rare earthquakes.The macro-results such as inter-story displacement angle,aggregate base shear and support reaction force of scaffold-tower connection were investigated.The microscopic damage and failure states of the structural components were checked and the seismic performance level was evaluated.Finally,the advantages of weak connection scheme were highlighted by comparing the mechanical performance of the high-position connected parts.Through calculation and analysis,the maximum support reaction force and slip amount of the friction pendulum support could meet the requirements of engineering design.
作者
缪志伟
马栋梁
张志强
李新舫
MIAO Zhiwei;MA Dongliang;ZHANG Zhiqiang;LI Xinfang(MOE Key Laboratory of Concrete and Prestressed Concrete Structures,Southeast University,Nanjing 211189,China;Wuhan Kailai Architectural Design Co.,Ltd.,Wuhan 430061,China)
出处
《建筑结构》
CSCD
北大核心
2021年第24期109-116,121,共9页
Building Structure
基金
国家自然科学基金项目(51008078)。
关键词
摩擦摆
高位连体结构
弹塑性时程分析
抗震性能评价
框架-剪力墙结构
friction pendulum
high-position connected structure
elastic-plastic time-history analysis
seismic performance evaluation
frame-shear wall structure
