基于自适应MC法大跨连续刚构桥施工控制可靠度研究  

Research on time-varying reliability of long-span continuous rigid frame bridge during construction period based on adaptive MC method

作　　者：刘扬[1,2] 丁欣海[1] 鲁乃唯[1] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410004 [2]"桥梁工程安全控制"省部共建教育部重点实验室,湖南长沙410004

出　　处：《交通科学与工程》2012年第4期25-31,共7页Journal of Transport Science and Engineering

基　　金：国家自然科学基金项目(50608009);教育部新世纪优秀人才支持计划(NCET-10-0139);交通部应用基础研究项目(2006319825070);湖南省教育厅科技项目(06c112)

摘　　要：针对预应力混凝土连续刚构桥不同施工阶段的抗力相关性和荷载相关性特征,基于随机过程模型,建立了桥梁施工期的抗力概率模型和荷载概率模型.采用自适应MC法,对实际工程进行可靠度研究.基于可靠度理论研究方法,验证了实际工程施工控制过程各项指标.研究结果对于确保预应力混凝土连续刚构桥建设的安全性和科学性,具有一定的理论价值和现实意义.According to the resistance correlation and load correlation features in differ- ent construction stages of prestressed concrete continuous rigid frame bridge,the resist- ance probability model and load model under construction process are established, which is based on the stochastic model. Adaptive importance sampling method is used for relia- bility to analyze the actual projects. Based on the reliability theory methods, the Index parameter is verified in actual construction control process. The result has some theo- retical value and practical significance for the construction safety of prestressed concrete continuous rigid frame bridge.

关 键 词：连续刚构桥 施工期时变可靠度 自适应MC法 施工控制 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]