文献类型：期刊文献

英文题名：Water pressure properties research in non-ballasted track crack under cyclic loading

作者：Xu, Gui-Hong Zhang, Zhi-Jun Yang, Guo-Wei Zhang, Wei-Biao

第一作者：徐桂弘

机构：[1] School of Civil Engineering, Guizhou Institute of Technology, Guiyang, China; [2] Institute of Mechanics, Chinese Academy of Sciences, Beijing, China; [3] China Railway 24th Bureau Group CO.LTD, Chengdu, China

第一机构：贵州理工学院土木工程学院

年份：2018

卷号：1

期号：Compendium5

起止页码：166-172

外文期刊名：Paper Asia

收录：EI(收录号：20184906210260);Scopus(收录号：2-s2.0-85057775854)

语种：英文

外文关键词：Cyclic loads - Flow interactions

摘要：The damage issue of non-ballasted track mainly caused by the crack, especially that under the influence of rainwater becomes gradually serious, the aim of this work is to analyze the water pressure properties in crack. The water pressure properties in cracks of non-ballasted track structures are investigated experimentally and numerically. First, Pre-existing crack concrete specimen with 510×1290×80mm dimensions was produced, and fluid-fracture interaction tests under cyclic loads were performed. The water pressure variations at different locations and with different loads frequencies as well as amplitudes were measured. Then, fluid-solid interaction mechanics-based finite element simulations were performed. From this study, it was determined that the water pressure alternates between positive and negative values under cyclic loading, and increase with the increase of crack depth, loads amplitude and loads frequency. Furthermore, the relationship between the water pressure, loads amplitude and loads frequency can be fitted into a polynomial expression. Finally, the analytical model is proposed. ? 2018, SHPMedia Sdn Bhd. All rights reserved.