摘要
土质边坡在降雨、自重等因素的共同作用下表现出应变软化特性,对土质边坡的长期稳定性具有一定影响。本研究利用有限元软件ABAQUS建立二维土质边坡模型,在应变软化本构过程中只改变应变软化参数,开展了边坡的渐进破坏过程的数值模拟。结果表明,坡脚处首先出现软化破坏,并伴随着塑性剪切破坏,破坏过程由坡脚向坡顶逐渐发展,直至土坡完全失稳。应变软化参数对土坡稳定性产生显著影响,随着网格尺寸、峰值塑性应变、残余内摩擦角及残余黏聚力的减小,土坡的动能、总应变能及位移总体上呈增大的趋势。本方法简单可靠,效率较高,能够较好地模拟土质边坡应变软化特性,切合工程实际。
Earthen slopes display strain softening characteristics when subjected to rainfall,self-weight,and other factors,which can affect their long-term stability.In this study,the ABAQUS was used to establish a two-dimensional model of an earthen slope,only change the strain softening parameters in the process of strain softening,and carry out the numerical simulation of the progressive damage of earthen slope.The slope gradually becomes unstable as the destruction process progresses from the base to the top.The stability of the slope is significantly affected by the parameters of strain softening.Reductions in mesh size,peak plastic strain,residual internal friction angle,and residual cohesion result in an increase in the slope's kinetic energy,total strain energy,and displacement.This method is simple,reliable,and efficient,and effectively simulates the strain softening characteristics of earthen slopes,making it well-suited for practical engineering applications.
作者
何静怡
孙政
岳臣龙
刘开
周晓敏
HE Jingyi;SUN Zheng;YUE Chenlong;LIU Kai;ZHOU Xiaomin(School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《江西冶金》
2024年第3期211-218,共8页
Jiangxi Metallurgy
基金
国家自然科学基金项目(12262013,11902127)
江西省自然科学基金杰出青年基金项目(20232ACB211005)
江西省主要学科学术和技术带头人培养计划——青年人才项目(20225BCJ23022)
江西省大学生创新创业训练项目(S202210407026)。
关键词
数值模拟
应变软化
渐进破坏
土坡
稳定性
numerical simulation
strain softening
progressive damage
soil slope
stability
