| 王丰,李宏男,伊廷华.考虑双向地震动作用的非对称结构多维Pushover分析[J].计算力学学报,2010,27(6):1055~1060 |
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| 考虑双向地震动作用的非对称结构多维Pushover分析 |
| A multiple Pushover analysis procedure for asymmetric structures subjected to bi-directional ground motions |
| 投稿时间：2008-12-04 修订日期：2009-11-04 |
| DOI：10.7511/jslx20106017 |
| 中文关键词: 双向地震动 等效单自由度系统 推覆分析能力曲线 弹塑性反应分析 |
| 英文关键词:bi-directional ground motions equivalent SDOF system Pushover capacity curve inelastic response analysis |
| 基金项目:大连民族学院科研基金(20086204);国家自然科学基金重大研究计划重点(90815026);国家"十一五"科技支撑计划重大(2006BAJ03A03);国家"十一五"科技支撑计划重点(2006BAJ06B03)资助项目. |
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| 中文摘要: |
| 目前的Pushover分析多集中于平面单向分析,考虑到非对称结构反应的多维性,在单向地震动作用振型Pushover分析研究基础上,提出了考虑双向地震动作用的结构多维Pushover分析程序。采用弹性振型分解的思路,将非线性结构反应近似为结构多振型弹塑性反应的叠加,进而将结构按振型等效为多个等效方程,将每一等效方程转化为以双向实际地震记录的组合为地震输入的等效单自由度体系。在此基础上给出了考虑双向地震作用的非对称结构多维Pushover分析程序,并阐述了该方法与传统Pushover分析方法的区别,最后通过算例将该方法结果与非线性时程分析结果进行比较,证明了该方法具有一定的准确性。 |
| 英文摘要: |
| The classic Pushover analysis procedure depends on the 2-D structural analysis which is inapplicable for asymmetric structures. So, a multiple Pushover analysis method to estimate seismic demands for asymmetric plan structures subjected to bi-directional ground motions is presented. The displacement response of asymmetric plan structures is supposed to equate to the combined responses of modal equivalent systems. The multiple Pushover analysis procedure is proposed, and an example for comparing structural response results of multiple Pushover analysis with the results of nonlinear dynamic time history analysis shows that the multiple Pushover analysis procedure for bi-directional ground motions may be used as an effective seismic demands estimation method for asymmetric plan structures. |
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