The dynamic responses of a pier-pile-soil system subjected to a barge/flotilla collision are analyzed. A coupled highspeed train and bridge system with a damaged pier after barge/flotilla collision is established by taking the additional unevenness of the track induced by the damaged pier as the self-excitation of the system. The whole process of a CRH2 high-speed train running on the 6x32 m simply-supported PC (prestressed concrete) box-girder bridge with a damaged pier is simulated as a case study. The results show that the lateral displacements and accelerations of the bridge with a damaged pier are much greater than the ones before the collision. The running safety indices of the train increase with the train speed as well as with the number of barges in the flotilla. In flotilla collision, the lateral wheel/rail forces of the train exceed the allowable values at a certain speed, which influences the running safety of the trains.
Chaoyi Xia: School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
Kunpeng Wang: CCCC Highway Bridges National Engineering Research Center Co., Ltd., Beijing 100120, China
Jiacheng Huang, He Xia: School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
Lin Qi: Tess, RTRI, Kokubunji-shi, Tokyo 184-8540, Japan
Xuan Wu: School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
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