Permanent deformation characteristics and shakedown analysis of coarse-grained embankment materials under moving wheel loads

被引：0

作者：

Zheng K. ^{[1
,2
]}

Xiao Y. ^{[1
,3
]}

Wang M. ^{[1
]}

Wang B. ^{[4
]}

Yan J. ^{[4
]}

Chen X. ^{[1
,3
]}

Ye X. ^{[1
]}

机构：

[1] School of Civil Engineering, Central South University, Changsha, 410075, Hunan

[2] Guangdong Communication Planning and Design Institute Co., Ltd., Guangzhou, 510507, Guangdong

[3] Ministry of Education (MOE) Key Laboratory of Engineering Structures of Heavy Haul Railway, Changsha, 410075, Hunan

[4] North Yutian Line Unit, Chawu Track Division, Daqin Railway Co., Ltd., Tangshan, 064107, Hebei

来源：

Xiao, Yuanjie (yjxiao@csu.edu.cn) | 1930年 / Academia Sinica卷 / 39期

基金：

中国国家自然科学基金;

关键词：

Coarse-grained embankment materials; Permanent deformation; Repeated loading; Rock mechanics; Shakedown analysis; Variable confining pressure triaxial tests;

D O I：

10.13722/j.cnki.jrme.2020.0165

中图分类号：

学科分类号：

摘要：

Conventional repeated load triaxial(RLT) tests can only simulate the cyclic load pulsed vertically. In order to study long-term deformation and failure mechanisms due to moving wheel loads more realistically, a series of RLT tests with both constant and variable confining pressure levels were conducted on typical base and subbase unbound granular materials. Different realistic in-situ stress paths defined by stress path slope, stress path length and minimum mean principal stress were applied. The coupling effect of cyclic deviatoric and confining stress components on the accumulation of the axial plastic strain was explored. Considering that the existing shakedown criteria for permanent deformation behavior cannot accurately distinguish different stages of permanent deformation behavior and are established from traditional RLT tests with constant confining pressure, a new criterion was proposed to address such insufficiencies. The improved accuracy and applicability of the modified shakedown analysis method and its criteria were confirmed by the realistic stress path test results obtained in this study. © 2020, Science Press. All right reserved.

引用

页码：1930 / 1943

页数：13

共 36 条

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