| 多联连续梁桥横桥向多模态推倒分析方法 |
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| 引用本文： | 曹飒飒,袁万城.多联连续梁桥横桥向多模态推倒分析方法[J].同济大学学报(自然科学版),2014,42(9):1305-1312. |
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| 作者姓名： | 曹飒飒 袁万城 |
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| 作者单位： | 土木工程防灾国家重点实验室,土木工程防灾国家重点实验室 |
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| 基金项目： | 国家自然科学基金资助项目（51278376,50978194,.90915011）, 同济大学土木工程学院光华基金资助 |
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| 摘 要： | 研究多联连续梁桥横桥向的多模态推倒分析(MPA)方法,用于初步设计阶段的抗震性能评估,并进一步对比分析了Luca折线简化方法与FEMA 356中折线简化方法应用于多模态推倒分析方法中的效果.以某三联主线桥为研究对象,进行多模态推倒分析和非线性动力时程分析.结果表明:多模态推倒分析方法可以对多联连续梁桥的抗震性能做出有效评估,Luca折线简化方法与FEMA 356中的折线简化方法相比优越性不明显.
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| 关 键 词： | 连续梁桥 多模态推倒分析(MPA) 延性 Luca折线 |
| 收稿时间： | 2013/11/9 0:00:00 |
| 修稿时间： | 5/7/2014 12:00:00 AM |
Modal Pushover Analysis Method in Transverse Direction of Multi span Continuous Bridges |
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| CAO Sasa and YUAN Wancheng.Modal Pushover Analysis Method in Transverse Direction of Multi span Continuous Bridges[J].Journal of Tongji University(Natural Science),2014,42(9):1305-1312. |
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| Authors: | CAO Sasa and YUAN Wancheng |
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| Institution: | State Key Laboratory for Disaster Reduction in Civil Engineering,State Key Laboratory for Disaster Reduction in Civil Engineering |
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| Abstract: | In order to reduce the computation time, the applicability of modal pushover analysis in ductility seismic performance evaluation of multi-span continuous bridges was analyzed. Compared with FEMA-356 fits, the superiority of Near-optimal piecewise linear fits for pushover curves was studied further. Based on 3 continuous units of the constructing Zhengzhou Longhai Bridge, modal pushover analyses coupled with both fits and nonlinear time-history analysis were conducted. The results indicated that modal pushover analysis method could predict the seismic performance of multi-span continuous bridges reasonably and the advantages of Near-optimal piecewise linear fits were not obvious compared with FEMA-356 fits. |
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| Keywords: | modal pushover analysis multi-span continuous bridge ductility preliminary design |
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