集簇式刚性连接组合梁桥的力学性能分析  

Mechanical Properties Analysis of Composite Beam Bridge with Clustered Rigid Connectors

作　　者：陈祺[1] 周叮[1] 刘朵[2] 张建东[3] 

机构地区：[1]南京工业大学土木工程学院,江苏南京211816 [2]河海大学土木与交通学院,江苏南京210098 [3]江苏省交通科学研究院,江苏南京211112

出　　处：《力学季刊》2017年第3期487-495,共9页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(51478107);江苏省交通运输科技项目(2014Y01)

摘　　要：为了研究任意荷载作用下集簇式刚性连接工字钢-混组合简支梁桥的应力和位移分布,首先将组合梁桥的三维结构简化为层合的二维弹性力学平面应力问题,分别求得各层简支梁的弹性力学解,然后用集中力替代集簇式刚性连接件对结构的作用力,根据梁桥表面的受力条件以及界面处位移和应力的衔接条件,确定待定未知量,从而得到组合梁桥的应力和位移分布函数.与有限元结果比较显示了该数值解具有很高的精度,参数化分析揭示了集簇式刚性连接组合梁桥的力学特点并且提出了簇钉间距的合理范围,研究结果为新型组合梁桥的工程设计提供了科学的理论依据.The stress and displacement distributions of steel-concrete composite simply supported beam bridge with clustered rigid connectors under arbitrary loads are investigated. Firstly, the three-dimensional composite beam bridge structure was simplified to the two-dimensional laminated plane stress problem of elasticity. Then, the elasticity solution of each layer of the simply supported composite beam was obtained. The forces exerted by the clustered rigid connectors were described as the concentrated forces. According to the loading condition at surfaces and the stress and displacement continuation conditions at interfaces, the unknown coefficients in the solution were determined and the stress and displacement distributions of composite beam bridge were obtained. Comparing with the finite element results indicated the high precision of the numerical solution. Parametric analysis revealed the mechanical characteristics of composite beam bridge with clustered rigid connectors and the reasonable value of spacing of clustered studs. The results provide the scientific basis for the engineering design of new composite bridge.

关 键 词：组合梁桥 集簇式剪力件 弹性力学解 刚性连接 平面应力问题 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]