摘要
多塔楼高层建筑能够将建筑功能最大化,是现代化城市中的重要组成部分,在地震作用下,各塔楼会产生相互作用,因此其受力特性比单塔楼高层建筑更加复杂。以典型的双塔超高层建筑--银川绿地中心为研究对象,选取了嵌固端设置在地下室顶板的单塔模型、嵌固端设置在地下室底板的单塔模型和考虑双塔相互作用的双塔楼模型,采用模态分析和动力弹塑性时程分析,讨论了双塔共同作用对其抗震性能的影响。分析结果表明:嵌固端设置在地下室顶板的单塔模型会高估结构的自振频率;嵌固端设置在地下室底板的单塔模型会明显低估结构的层间位移角、地震剪力以及地震损伤等地震响应,该结论可为进一步完善双塔高层建筑的抗震设计方法提供参考。
Multi-tower buildings can maximize the building functions and are an important part of modern cities. As the interaction between each tower under earthquake,their seismic responses are more complex than single-tower tall buildings. Taking the typical twin-tower high-sise building,Yinchuan Greenland Center,as the research object,three analysis models are selected,including a single-tower model with the fixed end set at the top of basement,a single-tower model with the fixed end set at the bottom of basement and a double-tower model considering the interaction of two towers. The effects of interaction of two towers on seismic performances of the whole building are discussed by modal analysis and nonlinear dynamic history analysis. The results show that the single-tower model with the fixed end set at the top of basement overestimates the natural frequency of the building;the single-tower model with the fixed end set at the bottom of basement significantly underestimates the inter-story drift ratio,shear force,and seismic damages of the building. These conclusions can be used as a reference for further improving the seismic design method of double-tower tall buildings.
作者
郑军
Zheng Jun(China Railway City Construction Group First Engineering Co.Ltd,Taiyuan 030024,Shanxi)
出处
《建筑科学》
CSCD
北大核心
2019年第11期33-38,共6页
Building Science
关键词
高层建筑
抗震性能
双塔共同作用
弹塑性分析
high-rise building
seismic performance
interaction of twin towers
elastoplastic analysis
