文献类型：期刊文献

英文题名：Influence of Scale Effect on Strength and Deformation Characteristics of Rockfill Materials

作者：Han, Hongxing[1];Li, Jing[2];Shi, Jicun[1];Yang, Cuina[1]

通讯作者：Han, HX[1];Shi, JC[1]

机构：[1]Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453003, Henan, Peoples R China;[2]Xinxiang Univ Broadcast & Televis, Architectural Teaching & Res Grp, Xinxiang 453000, Henan, Peoples R China

第一机构：新乡学院土木工程与建筑学院

通讯机构：[1]corresponding author), Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453003, Henan, Peoples R China.|[1107114]新乡学院土木工程与建筑学院;[11071]新乡学院;

年份：2022

卷号：15

期号：15

外文期刊名：MATERIALS

收录：;EI(收录号：20223612696215);Scopus(收录号：2-s2.0-85137144368);WOS:【SCI-EXPANDED(收录号:WOS:000838904000001)】；

基金：This work was supported by Xinxiang University Doctoral Research Starting Fund (1366020159), Science and technology guidance plan project of Henan Civil Architecture Society (202104) and Scientific research projects of higher learning institutions in Henan Province (21B140005).

语种：英文

外文关键词：rockfill materials; scale effect; triaxial test; maximum particle size; confining pressure; deformation characteristics

摘要：The hybrid method was adopted to model the original gradation of rockfill materials. According to the specification requirements, three simulated gradations of rockfill materials have been obtained. By the same token, the corresponding maximum particle sizes are 20 mm, 40 mm and 60 mm, respectively. With samples prepared under the same criterion of relative density, the scale effect on strength and deformation characteristics of the rockfill materials were studied by large-scale and consolidated-drained triaxial compression tests. The results show that when the confining pressure is higher, the peak deviator stress decreases with the increase of the maximum particle size. With the increase of the maximum particle size, the cohesion of rockfill materials gradually increases and the internal friction angle gradually decreases. Under the condition of the same maximum particle size, with the increase of confining pressure, the volume strain at the phase transition increases gradually, while the stress ratio at the phase transition decreases. Under the same confining pressure, the larger the particle size is, the smaller the volume strain becomes and the lower the stress ratio at the phase transition is. Therefore, the research results can provide a theoretical basis for establishing the constitutive model of rockfill materials considering the scale effect.