多横梁整体桥面结构桥面荷载传递途径及计算方法  

Routine and calculation of load transfer in monolithic deck with multi-transversal beams

作　　者：韩衍群[1] 史召锋 叶梅新[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075 [2]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《中南大学学报（自然科学版）》2010年第5期1993-1997,共5页Journal of Central South University:Science and Technology

基　　金：铁道部科技开发计划项目(2004G016-B-1)

摘　　要：以1座多横梁整体桥面钢桁梁桥为例,采用空间有限元法研究桥面荷载的传递路径及其变化规律,并得出路径传力比的计算式。研究结果表明:在多横梁整体桥面钢桁梁桥中,下弦杆不仅承受轴向力作用,而且承受竖向弯矩作用,竖向弯矩与节间横梁传力比有关;当节间内布置3根横梁时,节间横梁总传力比为0.6左右;路径传力比同下弦杆与桥面系(纵梁、纵肋和钢桥面板)的竖向刚度比λ1、节间横梁与节点横梁的竖向刚度比λ2有关,并随着λ1和λ2增加而增加;2条路径传递的荷载在不同的节间变化不大。Based on a truss bridge with multi-transversal-beam monolithic deck,the transfer routes of the load were studied with 3D FEM.And the formula of the load transfer ratio was given.The results show that in multi-transversal-beam monolithic deck,bottom chord elements endure bending moment in vertical direction as well as axial force.And the bending moment is related to the load transfer ratio of the transversal beams in the panel.When three transversal beams are set in the panel,the load transfer ratio of the transversal beams in the panel is about 0.6,which relates to the ratio λ1 of the vertical stiffness of bottom chord elements to that of the floor system（including longitudinal beams,longitudinal ribbed stiffeners and deck） and the ratio λ2 of the vertical stiffness of a transversal beam in the panel to that of a transversal beam at the chord joint,and it becomes greater with the increase of λ1 and λ2.

关 键 词：整体桥面 桥面荷载 传力比 高速铁路 

分 类 号：U448.1[建筑科学—桥梁与隧道工程]