墩体设计对梁跨结构振动的影响

Effects of pier design on superstructure vibration

以 3孔简支梁为对象 ,建立计算模型 ,从体系的自振特性和车振的特性分析墩体刚度和质量变化对梁体振动的影响规律。提出了临界墩高、临界墩顶刚度和临界梁墩刚度比等新的概念 。

: Based on three span simple supported beam structure, this paper deals with the effects of pier design on beam vibration aiming at natural frequency and vehicle bridge vibration of the structure. The calculating model has been established. Some new ideas such as the critical rigidity of pier, the critical height of pier and the critical rigidity ratio of beam to pier are put forward in the paper. These ideas, which can abate beam vibration, are very useful in the pier design.