Influence of interlayer adhesion parameters on interface damage of prefabricated slab track

被引：0

作者：

Du W. ^{[1
,2
]}

Ren J. ^{[1
,2
]}

Du J. ^{[1
,2
]}

Qu C. ^{[1
,2
]}

机构：

[1] MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu

[2] School of Civil Engineering, Southwest Jiaotong University, Chengdu

来源：

Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2024年 / 52卷 / 02期

关键词：

adhesion parameters; debonding rate; interface damage; prefabricated slab track; temperature gradient load;

D O I：

10.13245/j.hust.240759

中图分类号：

学科分类号：

摘要：

In order to investigate the influence of interlayer adhesion parameters on the interface connection between track slab and self-compacting concrete,a finite element simulation model of CRTS (China railway track system) III prefabricated slab track with cohesion model was established and the influence of different normal and tangential adhesion parameters on the interlayer damage development under the temperature gradient load was analyzed. The results show that reducing the interfacial stiffness and increasing the fracture energy have some effects on delaying the initiation of interfacial damage and interlayer debonding,but the effect is not significant.Increasing the cohesive strength can effectively control the development of interfacial damage and increase the magnitude of the starting temperature gradient for damage occurrence and interlayer debonding by a maximum of 125% and 54%,respectively.Under the effect of positive temperature gradient loading of 90 °C/m,changing the normal adhesion parameter has less effect on the interlayer debonding rate,but increasing the tangential adhesion strength and fracture energy can effectively reduce the interfacial damage area,and the reduction value of interlayer debonding rate is greater than 15%. © 2024 Huazhong University of Science and Technology. All rights reserved.

引用

页码：120 / 126

页数：6