首页|Transfer relation between subgrade frost heave and slab track deformation and vehicle dynamic response in seasonally frozen ground

Transfer relation between subgrade frost heave and slab track deformation and vehicle dynamic response in seasonally frozen ground

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Subgrade frost heave in seasonally frozen ground can greatly influence the safety and smooth running of high-speed trains and the service performance of track structures.In this study,we used a static model to:(1)investigate track-subgrade frost heave and develop a dynamic model of vehicle-track-subgrade frost heave;(2)explore the transfer relation between subgrade frost heave and track structure deformation;(3)examine the characteristics of interlayer debonding;(4)study the influence of subgrade frost heave on the dynamic response of vehicles in high-speed railways in seasonally frozen regions.A Fourier series was used to fit the frost heave waveform and simulate the behavior of subgrade uneven frost heave using data collected on-site.The results show:(i)The position of frost heave significantly affects the transfer of deformation to a slab track.The largest deformation of the track slab,with the amplitude transfer ratio reaching 20%,was recorded when the frost heave occurred near the joint of the base plate.(ii)At the same frost heave amplitude,long-wave frost heave causes smaller deformation and debonding of the track structure than short-wave frost heave.In the wavelength range of 10-30 m,the main frequency of the acceleration spectral density was concentrated between 3.5 and 3.7 Hz,with larger frost heave wavelengths producing smaller superposition on the vertical acceleration of the vehicle.(iii)The maximum wheel-rail force occurs when the front bogie passes the frost heave peak,with greater frost heave amplitudes producing greater wheel-rail force.From these results,we conclude there is a clear need to control the frost heave deformation of the track to reduce the dynamic response of the vehicle and in turn improve train operations.

Slab trackSubgrade frost heaveTransfer relationVehicle-track-subgrade couplingDynamic response

Juanjuan REN、Junhong DU、Kaiyao ZHANG、Bin YAN、Jincheng TIAN

展开 >

MOE Key Laboratory of High-speed Railway Engineering,Southwest Jiaotong University,Chengdu 610031,China

School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China

School of Civil Engineering,Central South University,Changsha 410075,China

Airport Planning and Design Institute,POWERCHINA Kunming Engineering Corporation Limited,Kunming 650051,China

展开 >

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaSichuan Provincial Youth Science and Technology Innovation TeamResearch and Development Program of China State Railway Group Co.,Ltd.China

2021YFF050210052022085522784612022JDTD0015N2022G033

2024

10.1631/jzus.A2300303

浙江大学学报(英文版)(A辑:应用物理和工程)
浙江大学

浙江大学学报(英文版)(A辑:应用物理和工程)

CSTPCD
影响因子：0.556
ISSN：1673-565X
年,卷(期)：2024.25(2)
  • 5