| 曲线高架桥在非一致地震作用下的随机反应分析 |
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| 引用本文： | 李青宁,孙军举.曲线高架桥在非一致地震作用下的随机反应分析[J].公路交通科技,2009,26(4). |
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| 作者姓名： | 李青宁 孙军举 |
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| 作者单位： | 1. 西安建筑科技大学,陕西,西安,710055
2. 西安建筑科技大学,陕西,西安,710055;潍坊市政工程设计研究院,山东,潍坊,261031 |
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| 基金项目： | 陕西省自然科学基础研究计划，陕西省教育厅专项科研计划 |
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| 摘 要： | 考虑行波效应和空间相干效应,利用随机振动的基本理论和分析方法建立了桥梁结构计算模型.对某一曲线高架桥分别进行了地震波单向输入时的一致和非一致地震随机反应分析,分析了不同视波速下的行波效应和不同空间相干程度对曲线桥结构反应量的影响规律.分析结果表明,在随机地震作用下,当考虑行波效应且视波速较小时,曲线桥在地震作用方向的墩顶位移、墩底内力变化较大,且随着视波速减小其反应增加的幅值越大;考虑空间相干效应时,在地震作用方向结构的反应却是减小的,随着相干程度的减弱,其减幅值增加,在完全不相干作用下.其减幅值最大,在30%至60%之间,即使在强相干作用下其值也不可忽略.
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| 关 键 词： | 桥梁工程 非一致地震作用 随机振动 曲线高架桥 行波效应 空间相干效应 |
Analysis of Stochastic Response of Curve Viaduct under Non-consistent Earthquake Action |
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| LI Qingning,SUN Junju.Analysis of Stochastic Response of Curve Viaduct under Non-consistent Earthquake Action[J].Journal of Highway and Transportation Research and Development,2009,26(4). |
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| Authors: | LI Qingning SUN Junju |
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| Institution: | 1.Xi'an University of Architecture and Technology;Xi'an Shaanxi 710055;China;2.Weifang Municipal Engineering Design Institute;Weifang Shandong 261031;China |
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| Abstract: | With consideration of the traveling wave effect and the spatial coherence effect,a bridge structure calculation model was established through the elementary theory and the analysis method of the random vibration.The stochastic response of a curve viaduct under one-way inputs of both the consistent earthquake action and the non-consistent one were analysed.Influences of the responses to the curve bridge structure due to the traveling wave function with different traveling wave velocity and the different spat... |
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| Keywords: | bridge engineering non-consistent earthquake action random vibration curve viaduct traveling wave effect spatial coherence effect |
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