Tehnički vjesnik, Vol. 28 No. 5, 2021.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20210208101312
Size Effect Analysis of Scale Test Model for High-speed Railway Foundation under Dynamic Loading Condition
Shuren Wang*
orcid.org/0000-0001-5490-2825
; 1) International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Henan Polytechnic University, 2) State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan Polytechnic University, No. 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China
Kunpeng Shi
; School of Civil Engineering, Henan Polytechnic University, No. 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China
Youfeng Zou
; International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Henan Polytechnic University, No. 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China
Zhengsheng Zou
; International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Henan Polytechnic University, No. 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China
Xuchun Wang
; School of Civil Engineering, Qingdao University of Technology, No. 11 Fushun Road, Qingdao, Shandong Province, 266033, China
Chunliu Li
; School of Urban Construction, Hebei Normal University of Science and Technology, No. 360 Hebei West Street, Qingdao, Hebei Province, 066004, China
Sažetak
To determine the energy attenuation and energy reflection coefficients in layered foundation is the key factor to reveal the dynamic response characteristics of the high-speed railway foundation. Based on the foundation test model under the dynamic loading of the high-speed railway, the energy attenuation and energy reflection coefficients were introduced and the attenuation formulas of the vibration acceleration in the layered foundation were deduced. Five scale models of 1:1, 1:2, 1:5, 1:10 and 1:20 are established respectively by using Abaqus technique. The energy attenuation mechanism and interfacial energy reflection characteristics in the layered foundation were analyzed. Results show that it is appropriate to use vibration acceleration to characterize the propagation rule of the energy attenuation in the layered foundation. The size effect equations of the energy attenuation and energy reflection coefficients in the layered foundation are deduced and the size effect of the energy attenuation is revealed. Based on the nonlinear relationships among the energy attenuation coefficient, the model scale, the loading amplitude and the vibration frequency, the energy attenuation equation of the scale test model is constructed. The reliability of the theoretical and simulation results is verified by the scale test model. The conclusions obtained in this study can provide a reference for a similar engineering practice.
Ključne riječi
high-speed railway foundation; ize effect; senergy attenuation; vibration acceleration
Hrčak ID:
261338
URI
Datum izdavanja:
15.8.2021.
Posjeta: 1.351 *