| 大跨率桥梁直接考虑拟静力位移影响的随机地震反应分析 |
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| 引用本文： | 程纬,刘光栋,等.大跨率桥梁直接考虑拟静力位移影响的随机地震反应分析[J].计算力学学报,2002,19(3):303-309. |
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| 作者姓名： | 程纬 刘光栋 |
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| 作者单位： | 1. 湖南大学,土木工程学院,长沙,410082;同济大学,桥梁工程系,上海,200092
2. 湖南大学,土木工程学院,长沙,410082 |
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| 基金项目： | 湖南省科技厅纵向课题基金资助 |
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| 摘 要： | 对 Duhamel积分引入了改进的脉冲响应函数 ,建立了激励演变谱矩阵与总动力响应演变谱之间的关系 ,并对实际大跨度斜拉桥进行了数值计算。这一成果实现了全面考虑各种地震动时空变化特性下的直接求解结构总动力响应的时域法和频域法计算列式 ,使得地震动多点激励下考虑拟静力位移影响的结构响应计算过程大为简化。
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| 关 键 词： | 大跨度桥梁 随机地震反应 地震动 虚拟激励算法 |
| 文章编号： | 1007-4708(2002)03-0303-07 |
| 修稿时间： | 2000年10月28 |
On random seismic response analysis of long-span bridge considering the effect of pseudo-static displacement directly |
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| Cheng Wei,\ Liu Guangdong,\ Yi Weijian.On random seismic response analysis of long-span bridge considering the effect of pseudo-static displacement directly[J].Chinese Journal of Computational Mechanics,2002,19(3):303-309. |
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| Authors: | Cheng Wei \ Liu Guangdong \ Yi Weijian |
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| Abstract: | A modified impulse response function is introduced to the Duhamel integral equations. The relation between the evolutionary power spectrum density matrix of earthquake excitations and the evolutionary spectrum density of structural response is established, which is used to calculate the random seismic responses of the actual cable-stayed bridge. The formula, including time domain scheme and frequency domain scheme, for directly calculating the total structural dynamical responses taking the spatial and time-varying properties of ground motions into account is realized. Therefore the computation of structural response under multi-support earthquake excitations considering the effect of pseudo-static displacement is simplified greatly. |
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| Keywords: | long span bridge random seismic response ground motion virtual excitation method |
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