斜交角对带翼墙框架式地道桥受力性能影响

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...

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

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.