抛物线拱桥在移动荷载作用下的动力响应分析

Dynamic response analysis of arch bridges under moving load

建立抛物线双铰拱桥的强迫振动的运动微分方程,分析了拱桥在移动荷载作用下的横向振动问题,将运动微分方程解耦,得到拱桥在移动荷载作用下振动时的动力响应并加以分析,通过实例计算,得到了拱桥在移动荷载不同行驶速度时的动力挠度曲线,并进行了比较分析。

A parabolic double hinged arch bridge under moving load is considered. The differential equations of forced vibration of the beam are established. The transversal vibration behaviors of a parabolic double hinged arch bridges are analyzed. The dynamic responses of the arch bridge under moving load is obtained by decoupling and resolving the differential equations. The dynamic deflection curves of the arch bridge under moving loads at various speeds are obtained,and the comparison between dynamical effects is analyzed.