TY - JOUR
T1 - Experimental and numerical investigations of the dynamic responses of an asymmetrical arch railway bridge
AU - Gou, Hongye
AU - He, Yannian
AU - Zhou, Wen
AU - Bao, Yi
AU - Chen, Genda
N1 - Publisher Copyright:
© IMechE 2018.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - The dynamic responses of an asymmetrical arch railway bridge subjected to moving trains are experimentally and numerically investigated in this study. The strains, displacements and accelerations at critical sections of the bridge were measured at different speeds of trains. A three-dimensional finite element model of the bridge–vehicle coupling system was established to understand the measured dynamic responses and was validated against the experimental results. The numerical model was used to analyze the influence of asymmetry on the dynamic responses of the bridge and the safety and ride comfort of trains. The results indicate that the dynamic responses of the bridge increase with the train speed. Braking of the train has the largest impact on the vertical dynamic displacement of the bridge. The maximum dynamic strain is in the arch rib. The longer half arch demonstrated much larger counterforce and dynamic responses than those of the shorter half arch, while the symmetrical structures tend to exhibit good symmetry. The asymmetrical arrangement of the bridge reduces the structural stiffness.
AB - The dynamic responses of an asymmetrical arch railway bridge subjected to moving trains are experimentally and numerically investigated in this study. The strains, displacements and accelerations at critical sections of the bridge were measured at different speeds of trains. A three-dimensional finite element model of the bridge–vehicle coupling system was established to understand the measured dynamic responses and was validated against the experimental results. The numerical model was used to analyze the influence of asymmetry on the dynamic responses of the bridge and the safety and ride comfort of trains. The results indicate that the dynamic responses of the bridge increase with the train speed. Braking of the train has the largest impact on the vertical dynamic displacement of the bridge. The maximum dynamic strain is in the arch rib. The longer half arch demonstrated much larger counterforce and dynamic responses than those of the shorter half arch, while the symmetrical structures tend to exhibit good symmetry. The asymmetrical arrangement of the bridge reduces the structural stiffness.
KW - Asymmetrical arch railway bridge
KW - concrete-filled steel tube
KW - dynamic response
KW - finite element analysis
KW - safety and ride comfort
KW - vehicle–bridge vibration
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U2 - 10.1177/0954409718766929
DO - 10.1177/0954409718766929
M3 - Article
AN - SCOPUS:85045273847
SN - 0954-4097
VL - 232
SP - 2309
EP - 2323
JO - Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
JF - Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
IS - 9
ER -