虚拟激励法在自锚式悬索桥竖向地震反应分析中的应用

注意：本论文已在《东南大学学报(自然科学版)》 2003, 33(4):522～525上发表
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刘春城　张哲　石磊
(大连理工大学桥梁工程研究所,大连116023)

摘要：考虑压、弯耦合效应,建立了自锚式悬索桥的竖向地震动方程,并利用虚拟激励法来求解,由于虚拟激励法自动计及了参振振型的互相关项和激励之间的互相关项,是快速精确的ＣＱＣ算法.文中以兰旗松花江混凝土自锚式悬索桥为例,计算了主梁、主塔和主缆的期望峰值响应,并对地震动空间效应对自锚式悬索桥的竖向地震反应影响规律作了详细的讨论.
关键词：虚拟激励;自锚式悬索桥;竖向地震反应;空间效应;压弯耦合

Application of pseudo excitation method to vertical seismic response analysis of self-anchored suspension bridges
Liu Chuncheng, Zhang Zhe, Shi Lei
(Bridge Engineering Institute, Dalian University of Technology, Dalian, 116023, China)

Abstract: The vertical seismic dynamic equation of self-anchored suspension bridges is presented by taking into account coupling effect of axial and flexural action, and pseudo excitation method is utilized to solve this equation. Because the method is highly efficient and involves the necessary cross-correlation terms both  between the participant modes and between the excitations, it is a fast and exact CQC (complete quadratic combination) algorithm. The expected peak responses of main beam, towers and cables of Lanqi Song Hua River concrete self-anchored suspension bridge are investigated, and the spatial variation effect on vertical seismic response of self-anchored suspension bridge are detailed.
Key words: pseudo excitation; self-anchored suspension bridge; vertical seismic response; spatial variation effect; coupling of axial and flexural action

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1、压弯耦合效应下自锚式悬索桥自由振动研究

2、两级模糊优选模型及非结构性模糊决策理论在桥梁方案比选中的应用

3、延吉市布尔哈通河局子街自锚式混凝土悬索桥设计

4、混凝土自锚式悬索桥结构内力分析

5、多支承激励下自锚式悬索桥空间地震反应分析

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