| 竖向地震引发的桥梁结构间的多次重撞击响应分析 |
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| 引用本文： | 徐然,尹晓春.竖向地震引发的桥梁结构间的多次重撞击响应分析[J].固体力学学报,2011(Z1). |
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| 作者姓名： | 徐然 尹晓春 |
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| 作者单位： | 南京理工大学力学与工程科学系; |
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| 基金项目： | 国家自然科学基金项目(10872095); 总装预研重点项目(21011019); 江苏省自然科学基金项目(BK2008408)资助 |
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| 摘 要： | 应用瞬态波函数法,针对双跨连续梁桥在竖向地震激励下可能出现的多次弹性重撞击问题进行了研究.推导出桥梁结构多次弹性重撞击问题的理论解,并采用临时组合结构法,求解了桥跨结构与桥墩之间的重撞击力.通过对桥梁算例的数值分析,计算模拟了多次重撞击现象,并分析了竖向地震激励周期、桥墩横截面积、梁与墩长度比以及桥跨弹性模量等参数对桥梁结构撞击响应的影响.研究结果表明,竖向地震可能使得桥跨结构与桥墩间发生多次重撞击行为,引发轴力的高频振荡,对桥梁结构响应有着明显的影响.多次重撞击的发生以及重撞击力的幅值对竖向地震激励周期相当敏感;梁与墩长度比和桥跨弹性模量都可以显著影响桥梁在竖向地震激励下的响应机理,应在桥梁抗震设计中予以考虑.
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| 关 键 词： | 桥梁 竖向地震 多次重撞击 瞬态波 参数分析 |
MULTIPLE-POUNDING TRANSIENT RESPONSES ANALYSIS OF BRIDGE UNDER VERTICAL EARTHQUAKES |
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| Ran Xu Xiaochun Yin.MULTIPLE-POUNDING TRANSIENT RESPONSES ANALYSIS OF BRIDGE UNDER VERTICAL EARTHQUAKES[J].Acta Mechnica Solida Sinica,2011(Z1). |
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| Authors: | Ran Xu Xiaochun Yin |
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| Institution: | Ran Xu Xiaochun Yin(Department of Mechanics and Engineering Science,Nanjing University of Science and Technology,Nanjing,210094) |
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| Abstract: | The transient wave effect approach is presented to study multiple-pounding between the girders and the pier of a bridge under vertical earthquakes.The theoretical solution of multiple elastic poundings of a single-pier and two-span bridge is derived and pounding force is calculated from the interfacial stress at the contant ends.The transient wave responses induced by multiple-pounding of bridge are also calculated.The effects of the vertical earthquake period,the cross-section area of pier,the length ratio... |
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| Keywords: | bridge vertical earthquake multiple poundings transient wave parameter analysis |
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