平面为曲线与直线相接时小半径匝道桥梁抗倾覆研究

Research on Anti-overturning of Minor Radius Ramp BridgeWhen the Plane is Connected with Straight Line as Curve

以实际工程为背景,利用MIDAS Civil Designer有限元软件进行结构建模,研究了当平面为曲线与直线相接时,曲线半径大小、固定支座位置、支座偏移量和车辆超载程度对小半径匝道桥梁抗倾覆性能的影响。计算结果表明,为提高小半径匝道桥梁的抗倾覆性能,固定支座应尽量放在直线段、曲线半径应尽量加大、设置支座偏移量,并严禁超载。

Taking the practical engineering as the background,the structural modeling is performed by using MIDAS Civil Designer finite element software,so as to study the influence of the size of curve radius,position of fixed bearing,bearing displacement and vehicle overload degree on the anti-overturning performance of minor radius ramp bridge when the plane is connected with straight line as curve.The calculation results show that,in order to increase the anti-overturning performance of minor radius ramp bridge,the fixed bearing should be placed in the straightway,the curve radius should be increased as much as possible,the bearing displacement is set up and overload is strictly prohibited.