竖向地震下双塔连体建筑的分析和设计(英文)  

Analysis and Design for Large Span Corridor Structures between Twin-Tower Tall Buildings under Vertical Seismic Excitation

作　　者：侯家健[1,2] 容柏生[2,3] 韩小雷[1] 谭平[4] 陈建秋[4] 谢毅源[1] 

机构地区：[1]华南理工大学建筑学院,广州510641 [2]广东省建筑设计研究院,广州500010 [3]广州容柏生建筑工程设计事务所,广州510170 [4]广州大学,广州510405

出　　处：《华南地震》2008年第4期63-74,共12页South China Journal of Seismology

基　　金：Guangzhou Construction Technology Development Funds (2006-25), Young Researcher Grant of IStructE

摘　　要：首先输入多条实际竖向地震记录,用时程分析考察了塔楼高度和连体跨度不同的多个算例。然后将其抽象成塔楼和连体桁架组成的双自由度体系,运用频域分析方法,得到竖向地震作用的变化规律:1)随着桁架对塔楼频率比增加,连体地震放大作用越明显;2)当连体对塔楼质量比较小且两者频率比相近1,连体地震反应进一步加强。现行抗震规范的重力系数法提出的大跨度结构竖向地震的实用计算公式对于本文研究结构并不完全适用。提出考虑塔楼和桁架协同地震作用的实用算式,并对一个超高层工程实例进行竖向地震作用分析,与时程分析结果吻合较好。To investigate vertical seismic responses of space corridors built between twin-connectedtower tall buildings, first time history analysis is applied with the input of vertical earthquake records, and the examples have varying tower heights and truss spans. Secondly, this type of structure is simplified as a 2-DOF system and analyzed in frequency domain, and the dynamic characteristics of its vertical seismic response are studied. The gravity coefficient method adopted by current China code for seismic design of buildings may not lead to safe results for the studied corridors. A practical design formula considering interaction between towers and corridors is suggested. A project example with truss at the top of a twin-tower super-tall building is analyzed with the suggested method and the time history method, and the results coincide well.

关 键 词：双塔 高层建筑 空中连廊 竖向地震 频域 时程分析 

分 类 号：P315.78[天文地球—地震学] P315.69[天文地球—固体地球物理学]