斜交角对带翼墙框架式地道桥受力性能影响  

Influence of Skew Angle on Mechanical Performance of Frame Type Underpass Bridge with Wing Wall

作　　者：王建省 李泽洲 陈晓强 Wang Jianxing;Li Zezhou;Chen Xiaoqiang(School of civil engineering,North China University of Technology,Beijing 100144,China)

机构地区：[1]北方工业大学土木工程学院,北京100144

出　　处：《铁道勘察》2021年第1期73-76,96,共5页Railway Investigation and Surveying

基　　金：国家自然科学基金项目(11572001,51478004)。

摘　　要：为解决实际工程中铁路与公路道口斜交问题,采用厚板理论,对洞口带翼墙斜交框架式地道桥进行受力性能分析,通过依次上调15%设计参数,研究在恒荷载和移动荷载作用下斜交角变化对地道桥内力、应力、位移等力学参数的影响。研究发现,顶板纵向弯矩随斜交角增加而增大,平均增幅为8.89%。顶板横向弯矩、竖向位移、上部最大主应力,翼墙与立墙连接部位最大主应力,均随斜交角增大而减小,其中应力和位移的平均减幅较大,分别为43.5%和8.65%。针对顶、底板钝角出现较大负弯矩的区域,提出布置相应加强筋的方案。In order to solve the problem of skew crossing between railway and highway in practical engineering,the mechanical performance of skew frame underpass bridge with wing wall at the entrance is analyzed by using thick plate theory,and the influence of skew angle change on mechanical parameters such as internal force,stress and displacement of Underpass Bridge under constant load and moving load is studied by increasing 15%design parameters in turn.It is found that the longitudinal bending moment of roof increases with the increase of skew angle,with an average increase of 8.89%.With the increase of skew angle,the transverse bending moment,vertical displacement of roof,the maximum principal stress at the upper part and the maximum principal stress at the connection between wing wall and vertical wall decrease,and the average reduction of stress and displacement is 43.5%and 8.65%respectively.In view of the area with large negative bending moment at obtuse angle of the top and bottom plates,the scheme of arranging corresponding stiffeners is proposed.

关 键 词：框架式地道桥 斜交角 有限元 翼墙 地道桥 

分 类 号：U442.5[建筑科学—桥梁与隧道工程] U448.34[交通运输工程—道路与铁道工程]