TY - JOUR
T1 - Running safety of high-speed train on deformed railway bridges with interlayer connection failure
AU - Gou, Hongye
AU - Liu, Chang
AU - Xie, Rui
AU - Bao, Yi
AU - Zhao, Lixiang
AU - Pu, Qianhui
N1 - Publisher Copyright:
© 2021 Techno Press. All rights reserved.
PY - 2021/5/10
Y1 - 2021/5/10
N2 - In a railway bridge, the CRTS II slab ballastless track is subjected to interlayer connection failures, such as void under slab, mortar debonding, and fastener fracture. This study investigates the influences of interlayer connection failure on the safe operation of high-speed trains. First, a train-track-bridge coupled vibration model and a bridge-track deformation model are established to study the running safety of a train passing a deformed bridge with interlayer connection failure. For each type of the interlayer connection failure, the effects of the failure locations and ranges on the track irregularity are studied using the deformation model. Under additional bridge deformation, the effects of interlayer connection failure on the dynamic responses of the train are investigated by using the track irregularity as the excitation to the vibration model. Finally, parametric studies are conducted to determine the thresholds of additional bridge deformations considering interlayer connection failure. Results show that the interlayer connection failure significantly affects the running safety of high-speed train and must be considered in determining the safety thresholds of additional bridge deformation in the asset management of high-speed railway bridges.
AB - In a railway bridge, the CRTS II slab ballastless track is subjected to interlayer connection failures, such as void under slab, mortar debonding, and fastener fracture. This study investigates the influences of interlayer connection failure on the safe operation of high-speed trains. First, a train-track-bridge coupled vibration model and a bridge-track deformation model are established to study the running safety of a train passing a deformed bridge with interlayer connection failure. For each type of the interlayer connection failure, the effects of the failure locations and ranges on the track irregularity are studied using the deformation model. Under additional bridge deformation, the effects of interlayer connection failure on the dynamic responses of the train are investigated by using the track irregularity as the excitation to the vibration model. Finally, parametric studies are conducted to determine the thresholds of additional bridge deformations considering interlayer connection failure. Results show that the interlayer connection failure significantly affects the running safety of high-speed train and must be considered in determining the safety thresholds of additional bridge deformation in the asset management of high-speed railway bridges.
KW - Additional bridge deformation
KW - Dynamic response
KW - High-speed railway
KW - Interlayer connection failure
KW - Mapping relationship
KW - Safety threshold
UR - http://www.scopus.com/inward/record.url?scp=85105647161&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85105647161&partnerID=8YFLogxK
U2 - 10.12989/scs.2021.39.3.261
DO - 10.12989/scs.2021.39.3.261
M3 - Article
AN - SCOPUS:85105647161
SN - 1229-9367
VL - 39
SP - 261
EP - 274
JO - Steel and Composite Structures
JF - Steel and Composite Structures
IS - 3
ER -