| 张亚辉,智浩,吕峰.结构多点随机地震响应分析及拟静位移计算[J].计算力学学报,2004,21(5):564~570 |
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| 结构多点随机地震响应分析及拟静位移计算 |
| Seismic random response analysis of Multisupported structures and the quasi-static displacement approximation |
| 修订日期：2002-12-19 |
| DOI：10.7511/jslx20045100 |
| 中文关键词: 大跨度结构 地震 空间效应 随机振动 |
| 英文关键词:long span structures,earthquake,spatial effects,random vibration |
| 基金项目:国家自然科学基金(10072015)，973项目NKBRSF(1999032805)资助项目. |
| 张亚辉 智浩 吕峰 |
| [1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116023 [2]北京特种工程设计研究院,北京100028 |
| 摘要点击次数: 1341 |
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| 中文摘要: |
| 给出了大跨度结构多点随机地震响应虚拟激励算法的若干实施细节，并讨论了将拟静位移项用自振振型和广义坐标来表达的做法。表明将拟静位移用自振振型和广义坐标来表达时，可能导致结构位移和内力响应非常大的误差，在实际应用时应予重视。 |
| 英文摘要: |
| For the seismic random response analysis of long span structures subjected to spatially varying ground motion, some details of the pseudo excitation method are provided. Variations of the ground motion due to the wave passage effect, the incoherence effect and the local effect are considered in the analysis. The total responses are decomposed into the quasi-static and the dynamic components, in which the dynamic component is solved based on the mode superposition method. The present paper also discusses the technique that expresses the quasi-static displacements in terms of mode shapes and generalized coordinates. It is found that this expression may cause severe errors for the responses of displacements and internal forces. Therefore, it should be paid more attention in practice. |
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