摘要
为反映刚度劣化对峰后力学行为的影响,提出描述刚度劣化程度的新参数,即刚度劣化指数.将峰后黏聚力和峰后内摩擦角假设成塑性剪切应变的函数,基于广义莫尔库仑准则,建立岩石峰后应变软化模型.利用北山花岗岩试验数据对模型进行验证.结果表明:模拟结果与试验数据规律吻合度较高,建立的峰后应变软化模型较为合理,为岩石峰后软化过程的模拟提供新的方法.
In order to reflect the effect of stiffness degradation on the post peak mechanical behavior,a new parameter describing the degree of stiffness degradation,the stiffness degradation index was proposed.Assuming that the post peak cohesion and the post peak internal friction angle are functions of the plastic shear strain,the post peak strain softening model of rock is established based on generalized Mohr Coulomb criterion.Beishan granite test data is used to verify the model.The results show that the simulation result are in good agreement with the experimental data,indicating the reasonableness of the established post peak strain softening model,a new method for the simulation of post peak softening of rocks is presented.
作者
杨哲豪
俞缙
涂兵雄
刘士雨
周建烽
蔡燕燕
YANG Zhehao;YU Jin;TU Bingxiong;LIU Shiyu;ZHOU Jianfeng;CAI Yanyan(Fujian Research Center for Tunneling and Urban Underground Space Engineering, Huaqiao University,Xiamen 361021,China)
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2018年第5期664-668,共5页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金资助项目(51679093
51774147)
福建省自然科学基金资助项目(2017J01094)
福建省高校新世纪优秀人才支持计划项目(2015年度)
福建省高校杰出青年科研人才培育计划项目(2016年度)
华侨大学研究生科研创新能力培育计划项目(17013086042)
关键词
刚度劣化
黏聚力
内摩擦角
塑性应变
应变软化
stiffness degradation
cohesion
friction angle
plastic strain
strain softening
