文章摘要
CFRP约束多裂隙岩体轴压性能研究
Study on axial compressive properties of multi-fracture rock mass restrained by CFRP
投稿时间:2023-06-13  修订日期:2023-06-13
DOI:
中文关键词: 裂隙岩体  碳纤维复合材料  数字图像相关技术  加固
英文关键词: fractured rock masses  carbon fiber composite material  digital image correlation  reinforce
基金项目:安徽省教育厅协同创新项目
作者单位邮编
梁志威 安徽理工大学 232001
张庆贺* 安徽理工大学 232001
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中文摘要:
      为了研究碳纤维复合材料对多裂隙岩体的加固性能,利用3D打印技术制备了含有20条裂隙的类岩石试件,并采用CFRP布进行表面约束加固,结合数字图像相关方法观测记录试件在单轴压缩过程中的应变演化特征。试验结果表明:在相同加载速率下,CFRP约束能显著提高多裂隙岩体试件的承载能力,但随着CFRP布层数的增加峰值强度增长比呈下降趋势;CFRP布约束增强了多裂隙岩体试件抵抗破坏的能力,且明显改善了试件在峰后阶段的脆性破坏特征;CFRP约束使更多的预制裂隙参与试件的破坏过程,增强了试件的整体性,有着良好的全局加固效果。
英文摘要:
      In order to study the strengthening performance of carbon fiber composite material on multi-fracture rock mass, a rock-like specimen containing 20 cracks was prepared by 3D printing technology, and the surface constraint reinforcement was carried out by CFRP sheet. The strain evolution characteristics of the specimen during uniaxial compression were observed and recorded by digital image correlation method. The experimental results show that under the same loading rate, the loading capacity of multi-fracture rock mass can be significantly improved by CFRP confinement, but the growth ratio of peak strength decreases with the increase of CFRP layers. CFRP sheet confinement enhances the failure resistance of multi-fracture rock mass specimens, and obviously improves the brittle failure characteristics in the post-peak stage. CFRP constraints make more prefabricated cracks participate in the failure process of the specimen, enhance the integrity of the specimen, and have a good global reinforcement effect.
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