摘要
为探究含等直径双圆孔的岩体的力学特性,对含孔径D为5 mm、10 mm、15 mm、20 mm的双圆孔的类岩体试件进行单轴压缩试验,并采用PFC(Particle Flow Code)程序对试验进行模拟,得到试件的单轴抗压强度和裂纹演化规律随孔径D、孔中心间距L、双孔中心连线与水平线的夹角α的变化规律。结果表明:当试样的孔径D与孔中心间距L相同时,抗压强度随α的增加呈先减小后增大的趋势,当α为45°或者60°时达到最小值;当D为10 mm且α为0°~60°时,抗压强度随L的增加呈先增加后减小的规律,当α为90°时,抗压强度随L的增加呈先减小后增大的规律;当夹角α相同时,单轴抗压强度随D的增大呈逐渐减小的规律。
In order to explore the mechanical properties of rock bodies with double circular holes of equal diameter,uniaxial compression experiments and PFC simulations were used to test for samples with double circular holes of diameters of 5 mm,10 mm,15 mm,and 20 mm.And the uniaxial compressive strength and the evolution law of cracks of samples varying with the diameter of the holes D,the distance L between the centers of the holes and the angleαbetween the center line of the double holes and the horizontal line were researched.The results show that when the value of D and L is equal,the compressive strength decreases first and then increases with the increase ofα,which generally reaches the minimum at 45°and 60°.When the value of D is 10 mm and the value ofαis 0°to 60°,the compressive strength increases first and then decreases with the increase of L.When the value ofαis 90°,the compressive strength decreases first and then increases.When the value ofαis equal,the uniaxial compressive strength gradually decreases with the increase of D.
作者
郝斌尧
汪子华
熊良宵
刘远鹏
李垠柯
程卓尔
王志豪
石龙
HAO Binyao;WANG Zihua;XIONG Liangxiao;LIU Yuanpeng;LI Yinke;CHENG Zhuo’er;WANG Zhihao;SHI Long(School of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China;Zhejiang Engineering Investigation Institute,Ningbo 315000,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第10期3213-3220,共8页
Bulletin of the Chinese Ceramic Society
基金
流域水循环模拟与调控国家重点实验室开放研究基金(IWHR-SKL-201708)。
关键词
类岩体试件
双圆孔
单轴抗压强度
PFC模拟
裂纹演化规律
artificial rock body
double circular holes
uniaxial compressive strength
PFC simulation
evolution law of crack
作者简介
郝斌尧(1999—),男。主要从事岩体力学方面的研究。E-mail:596519854@qq.com;通讯作者:熊良宵,博士,副教授。E-mail:xionglx1982@126.com。
