无格室-承压板钢-混凝土结合部构造的结构特性  

Structural Characteristics of Steel-concrete Connection Joint with Full-connection Bearing-plate Type

作　　者：吴文明[1] 刘高[1] 徐国平[1] 唐亮[1] 

机构地区：[1]中交公路规划设计院有限公司,北京100088

出　　处：《公路交通科技》2010年第3期75-80,共6页Journal of Highway and Transportation Research and Development

基　　金：交通部西部交通建设科技项目(200731849405)

摘　　要：为了解无格室-承压板钢-混凝土结合部构造的结构特性,对该类型结合部构造的受力特点及各结构参数影响进行了较系统的研究。通过混合有限元方法建立了无格室-承压板结合部构造的局部计算模型,讨论了其受力特点,并选取混凝土梁预应力、抗剪连接件刚度、抗剪连接件数量、抗剪连接件间距及承压板厚度等5项参数,对该类型的构造进行了较为系统的参数分析。分析结果表明,承压板和钢梁顶底板上的抗剪连接件是该类型结合部荷载传递的主要部件,承压板以承受板厚方向的剪切为主,混凝土梁承担了大部分的结构荷载;在所取的参数范围内,承压板厚度2070 mm的影响很小;混凝土预应力、抗剪连接件刚度和数量对该类型的结合部构造的受力性能影响很大,是设计过程中需重点考虑的问题。In order to study structural characteristics of steel-concrete connection joint with full-connection bearing-plate type,its loading characteristics and the effects of main parameters were investigated systematically.The local FE model of the type structure was built up by mixed finite element method to investigate its loading characteristics.Concrete prestress,stiffness of shear connectors,number of shear connectors,space of shear connectors and thickness of bearing-plate were selected to perform parameter analysis.The analysis result shows that（1） the bearing-plate and the shear connectors on the top/bottom plates of the steel girder are the primary load-transferring components,the bearing-plate resists shear stress through the thickness of bearing-plate and a majority of load is borne by concrete girder;（2） in the selected range of parameters,the bearing-plate thickness（20～70 mm） has negligible effect on the load transfer;（3）the effect of concrete prestress,stiffness and number of shear connectors on loading characteristics of the type structure is remarkable and must be carefully considered in the design.

关 键 词：桥梁工程 结构特性 有限元方法 钢-混凝土结合部 

分 类 号：U448.216[建筑科学—桥梁与隧道工程] U442.5[交通运输工程—道路与铁道工程]