| 大跨门式钢管桁架结构多点输入地震响应分析 |
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| 引用本文： | 江洋,石永久,王元清,张勇.大跨门式钢管桁架结构多点输入地震响应分析[J].北京交通大学学报(自然科学版),2009,33(4). |
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| 作者姓名： | 江洋 石永久 王元清 张勇 |
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| 作者单位： | 清华大学结构工程与振动教育部重点实验室;北京交通大学土木建筑工程学院; |
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| 基金项目： | 长江学者和创新团队发展计划资助(IRT00736) |
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| 摘 要： | 地震动空间效应导致结构不同支座处的地震激励不一致,大跨结构应进行多点输入地震响应分析.本文对一大跨门式钢管桁架结构进行多点输入时程分析计算,考察该类型结构分别受水平和竖向地震多点输入行波效应作用下的弹性响应特征.计算结果表明,多点输入地震动激发门式结构的水平对称振型和竖向反对称振型,是导致结构多点输入地震响应与一致输入产生差别的重要原因;地震波波速对结果影响较大,为保证结果的可靠性,应取有效范围内的多个视波速进行计算;上部结构和下部结构相比,刚度小的部位结构响应受多点输入影响大;水平多点输入桁架梁中部构件、竖向多点输入桁架梁端部构件内力变化极大.
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| 关 键 词： | 大跨度钢结构 地震响应 多点输入 行波效应 时程分析 |
Seismic Response Analysis of Large-Span Gate-Type Tube Truss Structures Under Multi-Support Excitation |
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| JIANG Yang,SHI Yongjiu,WANG Yuanqing,ZHANG Yong.Seismic Response Analysis of Large-Span Gate-Type Tube Truss Structures Under Multi-Support Excitation[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2009,33(4). |
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| Authors: | JIANG Yang SHI Yongjiu WANG Yuanqing ZHANG Yong |
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| Institution: | 1.Key Laboratory of Structural Engineering and Vibration of Education Ministry;Tsinghua University;Beijing 100084;China;2.School of Civil Engineering;Beijing Jiaotong University;Beijing 100044;China |
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| Abstract: | Viewing the inconsistency of earthquake ground motions of structural bases for large span structures,it is necessary to take the multi-support excitation into account.A typical large span Gate-type Tube Truss is taken as an example to investigate the seismic response properties of the structure form under horizontal and vertical multi-support excitation considering the wave-passage effect via time-history method.The results show that(1) the difference between multi-support and uniform excitation is primaril... |
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| Keywords: | large-span steel structure seismic response multi-support excitation wave-passage effect time-history analysis |
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