| 基于响应面法的混凝土桥梁时变可靠度分析 |
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| 引用本文： | 田浩,陈艾荣.基于响应面法的混凝土桥梁时变可靠度分析[J].同济大学学报(自然科学版),2011,39(2):166-171. |
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| 作者姓名： | 田浩 陈艾荣 |
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| 作者单位： | 1. 同济大学,桥梁工程系,上海,200092;里海大学土木与环境工程系ATLSS研究中心,伯利恒,18015
2. 同济大学,桥梁工程系,上海,200092 |
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| 基金项目： | 国家“八六三”高技术研究发展计划（2007AA11Z104）,交通部西部交通建设科技资助项目（2006 318 223 02-01）,国家自然科学基金项目（50878145） |
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| 摘 要： | 为了求解劣化环境作用时混凝土桥梁的时变可靠度,建立了基于改进响应面法和确定性的混凝土桥梁退化过程分析方法相结合的混凝土桥梁时变可靠度分析方法.利用FORTRAN95分别编写了混凝土桥梁耐久性分析程序CBDAS和可靠度分析程序PIRSM.以一座预应力混凝土简支梁为对象,分析了不同极限状态下结构力学性能指标的可靠度随时间的...
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| 关 键 词： | 混凝土桥梁 时变可靠度 响应面法 劣化环境 退化过程 极限状态 |
| 收稿时间： | 2009/9/23 0:00:00 |
| 修稿时间： | 2010/12/13 0:00:00 |
Time dependent Reliability Analysis of Concrete Bridges Based on Response Surface Method |
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| TIAN Hao and CHEN Airong.Time dependent Reliability Analysis of Concrete Bridges Based on Response Surface Method[J].Journal of Tongji University(Natural Science),2011,39(2):166-171. |
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| Authors: | TIAN Hao and CHEN Airong |
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| Institution: | Department of Bridge Engineering,Tongji University,Shanghai 200092, China;ATLSS Center,Department of Civil and Environmental Engineering, Lehigh University,Bethlehem,PA 18015,USA;Department of Bridge Engineering,Tongji University,Shanghai 200092, China |
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| Abstract: | In order to solve time dependent reliability of concrete bridges exposed to harsh environments,a computational methodology was developed with an improved response surface method and a deterministic degradation process analysis method of concrete bridges.Analysis programs named concrete bridge durability analysis system (CBDAS) and probability index by response surface method (PIRSM) were compiled by FORTRAN 95.The numerical method was implemented to a prestressed concrete simply supported bridge.The variations of various reliability indices in different limit states were analyzed.The results show that reliability index of concrete stress changes from 2.16 at completion 0.82 after 100 years.Mechanical property indices in serviceability limit state of prestressed concrete bridges may even suffer durability problems.The objective of time dependent reliability of concrete bridges is realized with the proposed computational methodology by overcoming the problem that the limit state equation of complex structure is always implicit. |
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| Keywords: | concrete bridge time dependent reliability Response Surface Method harsh environment degradation process limit state |
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