既有钢筋混凝土梁桥的承载力可靠度分析  

The bearing capacity reliability analysis of the existing reinforced concrete girder bridge

作　　者：刘扬[1] 雷尧 

机构地区：[1]长沙理工大学土木建筑学院,湖南长沙410004

出　　处：《交通科学与工程》2013年第4期33-39,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(2009);交通部应用基础研究项目(2006319825070);湖南省教育厅科技项目(06C12)

摘　　要：承载力可靠度是反映既有钢筋混凝土梁桥安全性的重要指标.对于既有钢筋混凝土梁桥,其材料强度和结构尺寸可以通过现场检测获得,同时,在桥梁服役期间内,桥梁已经承受了某一水平荷载的验证,并且桥梁各主要失效模式间存在相关性.综合考虑多种因素,建立了既有钢筋混凝土梁桥承载力可靠度分析的模型和方法,并应用于一座跨径为19.5m的5片简支梁桥的承载力可靠度评估中.Bearing capacity reliability is an important indicator to reflect the safety of the existing reinforced concrete girder bridge. For existing reinforced concrete girder bridge,the material strength and structure size can be obtained through the field detec- tion. Meanwhile, during the bridge service period, the bridge has been verified under a certain level load which is associated with the main failure modes of the bridge. Consid- ering many of factors comprehensively, the model and the method are established based on the bearing capacity reliability for the existing reinforced concrete girder bridges, which was applied in a simply supported girder bridge with 19.5 m span.

关 键 词：既有钢筋混凝土梁桥 承载力 可靠度 验证荷载 失效模式 

分 类 号：U448.34[建筑科学—桥梁与隧道工程]