岩土工程学报2025，Vol.47Issue(12)：2551-2558,8.DOI:10.11779/CJGE20240854
纤维加筋珊瑚砂力学特性及非共轴角计算模型
Mechanical characteristics and non-coaxial angles calculation model of fibre reinforced coral sand
摘要
Abstract
To study the strength and deformation properties of fibre-reinforced coral sand,conventional triaxial and hollow torsional shear tests and non-coaxial computational modelling of coral sand with different densities and polypropylene fibre dosage are carried out.The results show that:(1)Compared with the coral sand,the strength of polypropylene fibre coral sand is significantly improved,and the best fibre doping is around 0.3%,and the strength of fibre-reinforced coral sand is better when the densification is 65%.(2)Under the rotation of the main stress axis,the shear strain of the reinforced coral sand decreases with the increase of compactness,and the volume of the coral sand slightly expands after the rotation of 90°,and the non-coaxial angle generally shows a tendency of decreasing and then increasing,and the higher the compactness is,the stronger the coral sand coaxiality is.(3)A non-coaxial angle calculation model of fibre-reinforced coral sand is established by considering the co-axial and non-coaxial coupling deformation,and the test data verify the accuracy of the non-coaxial angle calculation model of fibre-reinforced coral sand.关键词
聚丙烯纤维/珊瑚砂/非共轴角计算/纤维掺量/密实度Key words
polypropylene fiber/coral sand/non-coaxial angles calculation/fibre content/compactness分类
建筑与水利引用本文复制引用
蔡燕燕,宣章清,张小燕,刘家顺,薛鹏,朱要亮,俞缙..纤维加筋珊瑚砂力学特性及非共轴角计算模型[J].岩土工程学报,2025,47(12):2551-2558,8.基金项目
国家自然科学基金联合基金项目(U2444220) （U2444220）
国家自然科学基金项目(52374090,42077254) （52374090,42077254）
福建省科技计划引导性项目(2022Y0029) （2022Y0029）
福建省自然科学基金项目(2023J011105)This work was supported by Project of the Joint Fund of the National Natural Science Foundation of China for Geology(Grant No.U2444220),National Natural Science Foundation of China Projects(Grant Nos.52374090,42077254) （2023J011105）
Fujian Provincial Science and Technology Plan Guiding Project(Grant No.2022Y0029) （Grant No.2022Y0029）
and Fujian Provincial Natural Science Foundation Project(Grant No.2023J011105). （Grant No.2023J011105）
