考虑弯、剪相关性的RC梁桥承载力可靠度评估  

Reliability evaluation of the bearing capacity of RC girder bridges considering flexural shear correlation

作　　者：袁明 陈鹏 颜东煌 YUAN Ming;CHEN Peng;YAN Dong-huang(School of Civil Engineering,Changsha University of Science & Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学土木工程学院

出　　处：《交通科学与工程》2019年第2期45-50,共6页Journal of Transport Science and Engineering

基　　金：国家自然科学基金资助项目(51178059,51678068);国家重点基础研究发展规划(973计划)项目(2015CB057706);湖南省自然科学基金项目(2017JJ5029)

摘　　要：进行了12片PC箱梁静力加载试验,并整理了已有的混凝土梁弯剪受力的试验数据。基于弯剪承载力抛物线计算模型,修正规范《公路钢筋混凝土及预应力混凝土桥涵设计规范(JTG D62-2018)》中的承载力计算方法。通过实例,分别基于修正的计算公式和规范中的计算公式对主梁承载力的可靠度进行了校核。研究结果表明:进行钢筋混凝土梁桥主梁截面设计时,应考虑弯、剪相关性对承载力计算公式的影响。The static loading test of 12 PC box girders is carried out, and the existing test data of the flexural and shear stress of concrete beams are sorted out. Based on the parabolic calculation model of the flexural and shear capacity, the calculation method of the bearing capacity in the corresponding specification is modified. Based on the modified formula and code(JTG D62—2018 "code for design of highway reinforced concrete and prestressed concrete bridge and culvert"), the reliability of the bearing capacity of the main girder is checked by an example. The results show that the influence of flexural shear correlation on the calculation formula of standard bearing capacity should be taken into account in the section design of Reinforced Concrete Girder Bridge.

关 键 词：桥梁工程 弯、剪相关性 箱梁试验 抛物线模型 承载力公式修正 

分 类 号：U448.3[建筑科学—桥梁与隧道工程]