高速铁路多Π形预应力混凝土梁桥动力特性及列车走行性分析

Analysis of dynamic characteristic & train running performance of multi Π type prestressed concrete bridge for high speed railway

提出了高速铁路多Π形预应力混凝土梁桥空间振动分析模型及列车－多Π形梁桥时变系统空间振动方程的建立方法，用它可简便分析跨宽比很小的多Π形梁桥与列车系统的空间振动，亦可用于一般单Π形梁桥考虑畸变与翘曲的静、动力分析。实例分析结果证明本文提出的模型和方法能良好地反映列车与桥梁系统的实际空间振动行为。

In this paper,an analytical model of multi Π type prestressed concrete bridge for high speed railway is presented,and a method with which the space vibration equations of time dependent train/Π type bridge system has been established.By using these model and method,the space vibration of the system of train and multi Π type bridge with small width/span ratio can be analysed simply,and they may be also used for dynamic or static analysis of ordinary single Π type bridge taking into account the effect of distortion and warp. It can be verified by the analytical result of an example that the actual space vibration can be reflected well by using the model and the method presented in this paper.