预制裂隙玄武岩纤维混凝土三轴力学性能试验研究  

Experimental study on triaxial mechanical properties of precast split basalt fiber concrete

作　　者：高翠 GAO Cui(School of Transportation and Architectural Engineering,Hefei Economic and Technical Vocational College,Hefei,Anhui 230000,China)

机构地区：[1]合肥经济技术职业学院交通与建筑工程学院,安徽合肥230000

出　　处：《湖南城市学院学报(自然科学版)》2025年第1期23-29,共7页Journal of Hunan City University:Natural Science

基　　金：安徽省高校科学研究项目(2023AH053118)。

摘　　要：采用三轴加载装置对预制裂隙玄武岩纤维混凝土开展了不同围压下的压缩试验,并分析预制裂隙角度、玄武岩纤维掺量及围压对试件峰值应力、黏聚力、弹性模量及体积应变的影响规律。结果表明:1)当围压及纤维掺量一定时,试件峰值应力和极限应变承载能力μ随着裂隙角度的增加均先降低后增加,其中,角度为0时影响最小;30°~45°左右时影响最明显;2)试件的峰值应力与围压呈线性正相关;3)纤维掺量的增加使试件峰值应力、弹性模量均先增大后降低,其较优的掺量为0.2%;4)围压越大试件体积应变越低,且不同预制裂隙角度的试件其极限应变承载能力均随着围压的增大而降低。The compression tests of basalt fiber reinforced concrete with prefabricated cracks under different confining pressures are carried out by triaxial loading device,and the effects of prefabricated crack angle,basalt fiber content and confining pressure on the peak stress,cohesion,elastic modulus and volume strain of the specimens are analyzed.The results show that:1)when the confining pressure and fiber content are constant,the peak stress and ultimate strain bearing capacity(μ) of the specimen decrease first and then increase with the increase of the crack angle.The influence is minimal when the angle is 0,and the influence is greatest when the angle is about 30°-45°.2)The peak stress of the specimen is linearly positively correlated with the confining pressure.3)The increase of fiber content makes the peak stress and elastic modulus of the specimen increase first and then decrease.The optimum content is 0.2 %.4)The higher the confining pressure is,the lower the volume strain of the specimen will be,and the ultimate strain bearing capacity of the specimen with different prefabricated fracture angles decreases with the increase of surrounding pressure.

关 键 词：玄武岩纤维 围压 预制裂隙 峰值应力 黏聚力 弹性模量 体积应变 

分 类 号：TU528[建筑科学—建筑技术科学]