双层交通混凝土箱梁传力路径试验研究与分析  

EXPERIMENTAL ANALYSIS ON THE FORCE TRANSMISSION PATH OF A DOUBLE-DECK TRAFFIC CONCRETE BOX GIRDER

作　　者：祝明桥[1] 张紫薇 蒋俏 石卫华[1] ZHU Ming-qiao;ZHANG Zi-wei;JIANG Qiao;SHI Wei-hua(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan,Hunan 411201,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《工程力学》2018年第A01期181-187,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51378202;51578236)

摘　　要：该文对双层交通箱梁试验模型的顶板不同位置在弹性范围内进行单点加载(6个工况)的试验研究。基于试验结果建立有限元模型对其进行分析,在分析值与试验值吻合良好的基础上,进一步探究了双层交通混凝土箱梁的传力路径。研究表明:箱梁的桥面板按双向板传递;节间荷载(内横梁、纵梁)的剪力按简支梁形式传到节点,再按节点的荷载分配系数分到到每榀框架梁,最后传到两端支座。Experimental studies of single point loading（6 working conditions） in the elastic range of the roof of a double-deck box girder test model was carried out. A finite element model was developed, and the force transmission path of the double-deck traffic concrete box girder was further explored on the basis of good agreement between the analytical and the experimental values. The analysis showed that the bridge deck of the box girder was transmitted by the two-way plate. The shear force of the internode load（inner beam and stringer） was transmitted to the node in the form of a simply supported beam, and then the load distribution coefficient of the joint was divided into each frame beam, and finally reached the ends of the bearing.

关 键 词：双层交通 混凝土箱梁 数值模拟 传力路径 荷载分配系数 

分 类 号：U448.12[建筑科学—桥梁与隧道工程]