轨道交通振动方向性对结构动力响应影响

IMPACT OF RAIL VIBRATION DIRECTION ON DYNAMIC RESPONSE OF STRUCTURE

为了研究轨道交通引起地面振动的方向性对结构动力响应的影响,确定三向地面振动作用下的结构动力响应与单向振动分量作用下的区别,研究工程分析中是否需要考虑三向振动作用,或者寻求一种代替轨道交通引起的地面振动作用的单一分量,本文利用ANSYS/LS-DYNA有限元分析软件建立结构实体模型,分析了结构在轨道交通引起的地面三向振动荷载作用和竖直、水平单向振动荷载作用下的动力响应,确定了应取最大速度峰值作用于竖直方向的三向地面振动作为轨道交通振动的安全标准值。

In order to study the impact of rail vibration direction to dynamic response of structure, get to know the different dynamic response of structure under the ground vibration in three - direction and one - direction, and discuss whether to consider the three - direction vibration or not when analyzing structures＂ dynamic response, or seek a single component to substitute rail vibration, we established a solid model to analyze the dynamic re- sponse of structure under vibration loads in three - direction or vertical, horizontal direction , through ANSYS / LS - DYNA explicit analysis programs, and we know that the three - direction vibration which the maximum peak speed loading in vertical should be treated as safety standard value of vibration caused by rail transit.