CLC number: U270
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2015-11-10
Cited: 8
Clicked: 6875
Jian Han, Guo-tang Zhao, Xin-biao Xiao, Ze-feng Wen, Qing-hua Guan, Xue-song Jin. Effect of softening of cement asphalt mortar on vehicle operation safety and track dynamics[J]. Journal of Zhejiang University Science A, 2015, 16(12): 976-986.
@article{title="Effect of softening of cement asphalt mortar on vehicle operation safety and track dynamics",
author="Jian Han, Guo-tang Zhao, Xin-biao Xiao, Ze-feng Wen, Qing-hua Guan, Xue-song Jin",
journal="Journal of Zhejiang University Science A",
volume="16",
number="12",
pages="976-986",
year="2015",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1500080"
}
%0 Journal Article
%T Effect of softening of cement asphalt mortar on vehicle operation safety and track dynamics
%A Jian Han
%A Guo-tang Zhao
%A Xin-biao Xiao
%A Ze-feng Wen
%A Qing-hua Guan
%A Xue-song Jin
%J Journal of Zhejiang University SCIENCE A
%V 16
%N 12
%P 976-986
%@ 1673-565X
%D 2015
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1500080
TY - JOUR
T1 - Effect of softening of cement asphalt mortar on vehicle operation safety and track dynamics
A1 - Jian Han
A1 - Guo-tang Zhao
A1 - Xin-biao Xiao
A1 - Ze-feng Wen
A1 - Qing-hua Guan
A1 - Xue-song Jin
J0 - Journal of Zhejiang University Science A
VL - 16
IS - 12
SP - 976
EP - 986
%@ 1673-565X
Y1 - 2015
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1500080
Abstract: cement asphalt mortar (CAM) softening is a common phenomenon that results from ageing and rain soaking when a high-speed railway is in service. CAM softening seriously affects vehicle operation safety and track dynamics. In this paper, a 3D coupling dynamic model of a vehicle and a China railway track system I (CRTS-I) slab track is developed. By using the proposed model, the wheel-rail contact forces, derailment coefficient, wheelset loading reduction ratio, and the track displacements are calculated to study the influences of CAM softening on the dynamic characteristics of a vehicle-track system. A track-subgrade finite difference model is developed to study the effect of CAM softening on track damage. The results show that track interface shear failure develops when the CAM softening coefficients reach 10–100. The CAM softening coefficient should not be less than 1000, otherwise a high-speed running vehicle may risk derailment.
Cement asphalt mortar (CAM) is vastly used in the structure of high-speed railroad system, serving as a cushion layer between the slab and concrete base. In practice, deterioration and even failure of CAM layer often occur seriously after some years of service. As an organic-inorganic composite material, many factors, including rain soaking, fatigue are involved in the deterioration process of CAM. This paper is focusing on the effect of CAM softening on the vehicle operation and track damage by using the developed coupling dynamic model. The topic of this paper is highly relevant to the high-speed railway practice and the findings are very highly valuable for understanding the risk of CAM deterioration in the whole high-speed railway system.
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