轨道交通振动方向性对结构动力响应影响
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摘要
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 response 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.
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 response 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.
引文
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[3]王耀峰.地铁振动对博物馆建筑及文物影响研究[D].北京:北京交通大学,2011.08.
[4]Konduru V.Rambabu,Mehter M.Allam Response of an open-plane frame to multiple support horizontal seismic excitations with soil–struc-ture interaction[J].Journal of Sound and Vibration,2007,299:388-396
[5]陈实,徐国彬,高日.列车振动对铁路沿线结构物影响的动力分析[J].北方交通大学学报,1988,08(4):57-60
[6]李宪同,于浩伟,魏东,等.地铁振动与噪声对周围建筑物的影响及控制措施[J].北方环境,2011,04(4):183-185
[7]陈士海,马方兴,魏海霞.爆破地震动三向荷载分量对结构动态响应研究[J].山东科技大学学报(自然科学版),2006,12(25):39-42
[8]邱法维,钱稼茹.结构在多维多点地震输入下的拟动力实验方法[J].土木工程学报,1999,10(32):28-34
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