文献类型：期刊文献

英文题名：Development of similar materials for fluid-solid coupling model testing and application in damage constitutive models

作者：Ren, Xu Xu, Guihong Chen, Ziwei Ran, Shixin Zhang, Jie

第一作者：任旭

通信作者：Xu, GH[1]

机构：[1]Guizhou Inst Technol, Coll Civil Engn, Guiyang 520025, Peoples R China;[2]Guizhou Univ, Coll Civil Engn, Guiyang 520025, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Coll Civil Engn, Guiyang 520025, Peoples R China.|贵州理工学院;

年份：2024

卷号：14

期号：1

外文期刊名：SCIENTIFIC REPORTS

收录：;Scopus(收录号：2-s2.0-85197184320);WOS:【SCI-EXPANDED(收录号:WOS:001259483400021)】；

语种：英文

外文关键词：Similar materials; Fluid-solid coupling tests; Sensitivity analysis; Hydraulic properties; Damage constitutive model

摘要：In order to provide suitable material selection for such fluid-solid coupling model tests, orthogonal experimental studies were conducted using iron concentrate powder and barite powder as aggregates, cement as cementitious materials, and gypsum and clay as modifiers. This research showed: (1) The ATC plays a dominant role in controlling the strength indexes and water absorption of the material, and these indexes show a significant decrease with the increase of the bone adhesive ratio. For each level of ATC increase, the compressive strength decreases by 0.2 MPa, the elastic modulus decreases by 10-20 MPa, and the cohesion decreases by 25-45 kPa. (2) Mixing gypsum and cement cannot jointly promote strength growth. (3) With the increase of GTC, the water absorption rate of the material increases, while the softening coefficient and permeability coefficient decrease obviously. Gypsum, which accounts for 4-16% of cement content, can be suitable for studying the hydraulic properties of similar materials for most sedimentary rock. Based on Weibull statistical damage theory, a damage constitutive model for the entire process of rock triaxial compression under the combined action of rainwater infiltration and load was established. Due to the influence of internal pores, the experimental and theoretical results have a certain deviation, the higher the confining pressure, the more obvious the deviation. In addition, the higher the rock strength, the less obvious the deviation caused by pores. This damage model can better describe the progressive failure process of rocks after rainwater infiltration, and can provide theoretical reference for the study of slope stability caused by rainwater infiltration.