| 自锚式悬索桥的平稳/非平稳随机地震响应 |
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| 引用本文： | 刘春城,石磊.自锚式悬索桥的平稳/非平稳随机地震响应[J].工程力学,2007,24(5):114-118. |
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| 作者姓名： | 刘春城 石磊 |
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| 作者单位： | 1. 东北电力大学建筑工程学院,吉林,132012;大连海事大学道路与桥梁研究所,辽宁,大连,116026
2. 大连理工大学桥梁工程研究所,辽宁,大连,116023 |
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| 摘 要： | 通过引入均匀调制演变函数,考虑了地震激励幅值的非平稳性。同时考虑了地震动空间效应,包括行波效应、部分相干效应和局部场地效应的影响,对一自锚式混凝土悬索桥结构进行了地震反应分析。计算了平稳/非平稳地面激励下主塔弯矩以及剪力反应。计算结果表明,考虑非平稳因素可使地震反应峰值减小,行波效应和相干效应使结构地震反应增大。
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| 关 键 词： | 均匀调制 非平稳 随机激励 自锚式悬索桥 地震响应 功率谱 |
| 文章编号： | 1000-4750（2007）05-0114-05 |
| 修稿时间： | 2005-09-152006-02-28 |
SEISMIC RESPONSES OF SELF-ANCHORED SUSPENSION BRIDGE UNDER STATIONARY AND NON-STATIONARY RANDOM EXCITATIONS |
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| LIU Chun-cheng,SHI Lei.SEISMIC RESPONSES OF SELF-ANCHORED SUSPENSION BRIDGE UNDER STATIONARY AND NON-STATIONARY RANDOM EXCITATIONS[J].Engineering Mechanics,2007,24(5):114-118. |
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| Authors: | LIU Chun-cheng SHI Lei |
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| Affiliation: | 1. School of Civil Engineering, Northeast Dianli University, Jinlin 132012, China; 2. Institute of road and bridge engineering, Dalian Maritime University, Liaoning, Dalian 116026, China; 3. Institute of bridge engineering, Dalian University of Technology, Liaoning, Dalian 116023, China |
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| Abstract: | The uniformly modulated evolutionary function is introduced for the seismic response analysis of a self-anchored suspension bridge with the non-stationary seismic excitation amplitudes and the seismic spatial varying ground motion effect including wave passage effect, ground motion coherence loss and local-spatial variation ground effect taken into account. The bending moment and shearing force of the tower are investigated under stationary and non-stationary ground excitations. It can be verified that the seismic response peak values are decreased under non-stationary excitation. By taking into account wave passage effect and coherence loss, the seismic response peak values are increased. |
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| Keywords: | uniformly modulated non-stationary random excitation self-anchored suspension bridge seismic response spectrum density |
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