梁拱组合拱桥拱脚局部应力分析和试验研究  

Analysis of local stress at arch footing of beam-arch combination bridge and test research

作　　者：杨剑[1] 邹团结 汪金胜[1] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]湖南永龙高速公路建设开发有限公司,湖南永顺416700

出　　处：《铁道科学与工程学报》2014年第6期25-29,共5页Journal of Railway Science and Engineering

基　　金：铁道部科学技术研究资助项目(2009D04-A)

摘　　要：某外倾式梁拱组合拱桥的拱、梁连接处原设计采用高强螺栓连接,由于某些原因在施工过程中变更为焊接连接。由于该拱脚连接部分受力复杂,且焊缝连接对结构受力以及运营维护提出了更高要求。为了解拱梁连接处应力分布,并为后期桥梁的运营维护提供理论依据,采用有限元建立该桥拱脚连接处的精细化有限元,并以实际施工过程中的监测结果进行验证,研究结果表明:采用板壳单元的精细化有限元拱脚模型能有效模拟拱脚局部应力分布特征,研究分析结果将为后期运营维护提供重要的参考。The connected type of beam-arch joint located at arch footing,which was originally designed with high strength friction grip bolt,was changed to welding connection owing to some reasons.The localized stress of arch footing is very complex,and hence it needs higher requirements for future operation and maintenance.In order to analyze the behavior of the arch footing,the refined finite element of the arch footing was established, and the corresponding monitoring results from actual projects were utilized to verify its validity.The results show that the stress distribution of arch footing can be well simulated by the plate shell refined finite element,which can be of significant reference for construction safety of arch footing and maintenance in operation stage.

关 键 词：拱脚 局部应力 有限元 

分 类 号：U448[建筑科学—桥梁与隧道工程]