TY - JOUR
T1 - In-situ testing and model updating of a long-span cable-stayed railway bridge with hybrid girders subjected to a running train
AU - Gou, Hongye
AU - Zhao, Tianqi
AU - Qin, Shiqiang
AU - Zheng, Xiaogang
AU - Pipinato, Alessio
AU - Bao, Yi
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/2/15
Y1 - 2022/2/15
N2 - This study investigates the dynamic responses of a long-span cable-stayed railway bridge with steel–concrete hybrid girders in different train load scenarios. The investigated scenarios included driving and braking of running trains. The bridge was instrumented with different types of sensors to measure strains, displacements, and accelerations during train load testing. Based on the measurement results, this study evaluated the effects of train speed on the vertical and transverse accelerations, impact factor, derailment coefficient, and wheel unloading rate, which are critical parameters that affect safety and riding comfort. Assessment results revealed that the bridge had adequate dynamic behavior to ensure safe operation and riding comfort of the train. Based on test data, a finite element model was developed, and a finite element model updating framework was proposed to improve the prediction accuracy. This study provides real-life test data and an assessment tool for promoting design and evaluation of cable-stayed railway bridges.
AB - This study investigates the dynamic responses of a long-span cable-stayed railway bridge with steel–concrete hybrid girders in different train load scenarios. The investigated scenarios included driving and braking of running trains. The bridge was instrumented with different types of sensors to measure strains, displacements, and accelerations during train load testing. Based on the measurement results, this study evaluated the effects of train speed on the vertical and transverse accelerations, impact factor, derailment coefficient, and wheel unloading rate, which are critical parameters that affect safety and riding comfort. Assessment results revealed that the bridge had adequate dynamic behavior to ensure safe operation and riding comfort of the train. Based on test data, a finite element model was developed, and a finite element model updating framework was proposed to improve the prediction accuracy. This study provides real-life test data and an assessment tool for promoting design and evaluation of cable-stayed railway bridges.
KW - Cable-stayed railway bridge
KW - Dynamic response
KW - Hybrid bridge girder
KW - Impact factor
KW - In-situ testing
KW - Model updating
KW - Operation safety
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U2 - 10.1016/j.engstruct.2021.113823
DO - 10.1016/j.engstruct.2021.113823
M3 - Article
AN - SCOPUS:85122491184
SN - 0141-0296
VL - 253
JO - Engineering Structures
JF - Engineering Structures
M1 - 113823
ER -