高层支撑钢框架弹塑性地震反应简化分析模型
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摘要
本文首先将高层支撑钢框架结构分解成纯框架和纯支撑体系两部分,并与一列受载铰接刚性杆并联,以考虑几何非线性的影响;然后将框架部分简化为半刚架,将支撑体系部分简化为铰接桁架,以此进行结构弹塑性地震反应分析.在前人试验和理论研究成果的基础上,本文还提出了能准确反映钢支撑主要滞回特征的支撑恢复力模型,便于工程实用.通过算例对比分析,表明采用本文提出的高层支撑钢框架简化模型进行弹塑性地震反应分析,具有计算精度高、计算自由度少、计算时间省的优点,是一种有效的近似方法.
Regarding a tall braced steel frame as a frame plus a bracing system, the analysis of the structure can be simplified. The frame part of a braced frame can be simplified as a half - frame with only one column each storey, and the bracing part of the braced frame can be treated as a hinged vertical truss. For the analysis of elasto - plastic response of braced steel frames subjected to earthquakes, a practical restoring force model is proposed. It is shown by numerical investigation that the simplified model presented in this paper is effective for predicing the elasto- plastic seismic response of tall braced steel frames.
Regarding a tall braced steel frame as a frame plus a bracing system, the analysis of the structure can be simplified. The frame part of a braced frame can be simplified as a half - frame with only one column each storey, and the bracing part of the braced frame can be treated as a hinged vertical truss. For the analysis of elasto - plastic response of braced steel frames subjected to earthquakes, a practical restoring force model is proposed. It is shown by numerical investigation that the simplified model presented in this paper is effective for predicing the elasto- plastic seismic response of tall braced steel frames.
引文
1． Council on Tall Buildings.Structural Design of Tall Steel Buildings.ASCE,New York,1979．
2． 建设部标准.高层建筑钢结构设计与施工规程(报批稿).1992．
3． 上海市标准.高层建筑钢结构设计暂行规定.1993．
4． 李国强,沈祖炎.钢框架弹塑性地震反应简化分析方法.工业建筑,1990,(1) .
5． 沈祖炎,李国强,吴亦茜.高层钢框架弹塑性地震反应简化分析模型.建筑结构,1993,(4) .
6． Higginbotham A B,Hanson R D.Axial Hystertic Behavior of Steel Members.ASCE,ST,July,1976:1365-1381．
7． Kahn L F,Hanson R D.Inelastic Cycles of Axially Loaded Steel Members.ASCE,ST,May,1976:947-959．
8． Jain AK,et al.Hysteresis Models of Steel Member for Earthquake Response of Braced Frames.Proc.of the 7th WCEE,Vol.6,1980:464-470．
9． 谢卫兵.高层支撑钢框架弹塑性地震反应分析方法的研究.同济大学硕士学位论文,1993．
2． 建设部标准.高层建筑钢结构设计与施工规程(报批稿).1992．
3． 上海市标准.高层建筑钢结构设计暂行规定.1993．
4． 李国强,沈祖炎.钢框架弹塑性地震反应简化分析方法.工业建筑,1990,(1) .
5． 沈祖炎,李国强,吴亦茜.高层钢框架弹塑性地震反应简化分析模型.建筑结构,1993,(4) .
6． Higginbotham A B,Hanson R D.Axial Hystertic Behavior of Steel Members.ASCE,ST,July,1976:1365-1381．
7． Kahn L F,Hanson R D.Inelastic Cycles of Axially Loaded Steel Members.ASCE,ST,May,1976:947-959．
8． Jain AK,et al.Hysteresis Models of Steel Member for Earthquake Response of Braced Frames.Proc.of the 7th WCEE,Vol.6,1980:464-470．
9． 谢卫兵.高层支撑钢框架弹塑性地震反应分析方法的研究.同济大学硕士学位论文,1993．
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