CLC number: U213
On-line Access: 2020-04-10
Received: 2019-10-19
Revision Accepted: 2020-03-16
Crosschecked: 2020-03-24
Cited: 0
Clicked: 3576
Citations: Bibtex RefMan EndNote GB/T7714
Juan-juan Ren, Hao-lan Li, Xiao-pei Cai, Shi-jie Deng, Ji Wang, Wei Du. Viscoelastic deformation behavior of cement and emulsified asphalt mortar in China railway track system I prefabricated slab track[J]. Journal of Zhejiang University Science A, 2020, 21(4): 304-316.
@article{title="Viscoelastic deformation behavior of cement and emulsified asphalt mortar in China railway track system I prefabricated slab track",
author="Juan-juan Ren, Hao-lan Li, Xiao-pei Cai, Shi-jie Deng, Ji Wang, Wei Du",
journal="Journal of Zhejiang University Science A",
volume="21",
number="4",
pages="304-316",
year="2020",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1900525"
}
%0 Journal Article
%T Viscoelastic deformation behavior of cement and emulsified asphalt mortar in China railway track system I prefabricated slab track
%A Juan-juan Ren
%A Hao-lan Li
%A Xiao-pei Cai
%A Shi-jie Deng
%A Ji Wang
%A Wei Du
%J Journal of Zhejiang University SCIENCE A
%V 21
%N 4
%P 304-316
%@ 1673-565X
%D 2020
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1900525
TY - JOUR
T1 - Viscoelastic deformation behavior of cement and emulsified asphalt mortar in China railway track system I prefabricated slab track
A1 - Juan-juan Ren
A1 - Hao-lan Li
A1 - Xiao-pei Cai
A1 - Shi-jie Deng
A1 - Ji Wang
A1 - Wei Du
J0 - Journal of Zhejiang University Science A
VL - 21
IS - 4
SP - 304
EP - 316
%@ 1673-565X
Y1 - 2020
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1900525
Abstract: Under repeated train-induced loads, cement and emulsified asphalt mortar (CA mortar) as a viscoelastic material has a time-dependent deformation, part of which is irreversible. This could lead to debonding between the mortar layer and the track slab. Based on the theory of viscoelasticity and the analytical method of the time hardening law (THL), the viscoelastic deformation behavior of CA mortar was studied. Using ABAQUS, we established a solid model of china railway track system (CRTS) I prefabricated slab track, with CA mortar at different initial Young’;s moduli under cyclic loading corresponding to the influence of actual train loads. The results reveal that the fitted parameters of the THL for CA mortar are suitable for describing its viscoelastic deformation. As the initial Young’;s modulus increases, the strain difference before and after cyclic loading gradually decreases, and the displacement difference increases from 0.2 mm to 0.6 mm. The deformation mainly occurs at the end of a mortar layer with longitudinal distribution of about 2.5 times the fasteners’ spacing. It follows that the viscoelastic performance of CA mortar is one of the most important reasons that cause debonding underneath the track slab. Therefore, we suggest that the adverse effects of viscoelastic behavior of CA mortar should be considered when researching such deformation and damage.
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