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中国公路学报
CHINA JOURNAL OF HIGHWAY AND TRANSPORT
2006 Vol.19 No.5 P.53-58

数字化期刊

混凝土斜拉桥施工阶段的体系可靠度

刘扬  张建仁 

摘 要:针对斜拉桥失效路径繁多的问题,采用改进的β约界法限制分枝规模,寻找并识别对结构体系可靠度起主导作用的主要失效模式.通过现场试验建立了高强度混凝土早龄期力学性能的经时概率模型.同时,考虑各主要失效模式间的相关性,提出了计算体系失效概率上下界的实用方法.通过一座双塔斜拉桥施工期体系可靠度的计算实例表明了这一方法的有效性.研究成果对于评价混凝土斜拉桥施工期的结构整体性能和安全程度具有参考价值.
关键词:桥梁工程;斜拉桥;改进的β约界法;体系可靠度;施工期;早龄期;失效模式
分类号:U448.27  文献标识码:A

文章编号:1001-7372(2006)05-0053-06

System Reliability for Concrete Cable-Stayed Bridges During Construction

LIU Yang  ZHANG Jian-ren 

基金项目:国家自然科学基金项目(50178011);交通部应用基础研究项目(200631582511)
作者简介:刘扬(1973-),男,湖南华容人,长沙理工大学副教授,工学博士,博士后,E-mail:13973198842@vip.163.com.
作者单位:刘扬(长沙理工大学,桥梁与结构工程学院,湖南,长沙,410076;中南大学,土木建筑学院,湖南,长沙,410075) 
     张建仁(长沙理工大学,桥梁与结构工程学院,湖南,长沙,410076) 

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收稿日期:2006年1月29日

出版日期:2006年9月30日