Dynamic Response of Vehicle-Bridge System Considering Soil-Structure Interaction
This paper explores dynamic soil-bridge interaction in high-speed railway lines.The a nalysis was conducted using a general and fully three-dimensional multi-body finite element model formulated in the time domain to predict vibrations caused by trains passing over the 32m standard simply supported Girder Bridge.The vehicle was modeled as a multi-body system, the track and the bridge were modeled using finite elements and the soil was considered as a half-space with vicious spring artificial boundary conditions.The dynamic responses of bridge superstructure of vehicle bridge-pier-pile-soil (VBPPS) system were compared with that of vehicle-bridge (VB) system and vehicle-bridge-pier (VBP) system.The effects of various parameters, including train speed, track irregularity, pier height and SSI, on the dynamic response of bridge was discussed.The results show that: (i) the effects of stiffness of pier and foundation on the horizontal dynamic character of bridge are more obvious than vertical dynamic character.Compared with V-B system, the horizontal fundamental nature frequency of VBPPS system is reduced by 85.7% ; (ii) the mid-span dynamic response of VBPPS system is largest than other two systems, compared with vertical dynamic re spense, the amplitude of horizontal dynamic response increased more significantly; (iii) the mid span dynamic response of beam doesnt increase linearly with vehicle speed, track irregularity, the height of pier and length of pile.
high-speed railway vehicle-bridge coupling vibration soil-structure interaction track irregularity dynamic response
Z.H.Zhu B.Guan Y.L.Zhu Z.H.Zhu
School of Civil Engineering, Central South University, Changsha, Hunan National Engineering Laboratory for High Speed Railway Construction, Changsha, Hunan
国际会议
第六届国际环境振动学术研讨会(6th International Symposium on Environmental Vibration)(ISEV2013)
上海
英文
277-286
2013-11-08（万方平台首次上网日期，不代表论文的发表时间）