圆心角对小半径曲线桥受力性能的影响

The influence of central angle on force performance of small radius curved bridge

通过建立5种不同的圆心角的计算模型,研究圆心角对小半径曲线桥纵向弯矩、扭矩和竖向剪力的影响。研究表明:在汽车荷载和恒载作用下,改变圆心角的大小对小半径曲线桥的纵向弯矩的影响较小,对扭矩的影响较大。在汽车荷载作用下,改变圆心角的大小对竖向剪力影响较大;在恒载作用下,改变圆心角的大小对竖向剪力的影响较小。

Through the establishment of five different central angle calculation models, studied on the influence of central angle on the longitudinal bending moment, torque and vertical shear of small radius curved bridge. Research shows that： under the action of vehicle load and dead load, the effect of changing the size of the central angle on longitudinal bending moment of small radius curved bridge is small, and the influence on torque is large. Under vehicle load, the effect of changing the size of central angle on vertical shear is large ; under dead load, the effect of changing the size of central angle on vertical shear is small.