岩体弹粘塑性显式波动有限元分析  

Elastic-viscoplastic analysis of explicit FEM for simulating wave motions in rock mass

作　　者：刘红帅[1,2] 唐立强[1] 薄景山[2,3] 冯志仁[2] 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080 [3]防灾科技学院,河北三河065201

出　　处：《煤田地质与勘探》2009年第1期38-42,47,共6页Coal Geology & Exploration

基　　金：中国地震局工程力学研究所基本科研业务费专项资助项目(2006B10);国家自然科学基金项目(40702055)

摘　　要：真实反映地震动传播特性的分析方法是准确描述岩体地震反应的基础。基于显式波动有限元,采用能够考虑应变率影响的弹粘塑性本构模型,提出了一种用于分析岩体地震反应的新方法,编制了相应的计算程序。以均质岩石边坡为例,计算了EL-CENTRO波输入下边坡的位移和应力反应,并将计算结果与采用粘弹性本构模型的结果进行了比较,初步验证了程序的可靠性。计算结果表明,所提出的新方法能够较合理地计算出地震作用下边坡的永久位移和残余应力。The analysis method that can exactly reflect the characteristics of ground motion transmitting is the basis for describing seismic response of rock mass. Based on explicit wave motion finite element method （FEM）, a new method was suggested by using an elastic-viscoplastic constitutive model which considered the effect of strain rate on dynamic properties of rock mass. According to this method, a computation program was compiled and was applied in the analysis of uniform rock slope. The slope displacement and stress response to the input of EL-CENTRO wave were calculated. Through comparison with the results of visco-elastic model, the validity of program was verified. The results showed that the new method could be reasonably applied to the calculation of permanent displacements and residual stresses of rock slope under earthquake ground motion.

关 键 词：岩体 弹粘塑性模型 显式波动有限元 永久位移 残余应力 

分 类 号：P642.22[天文地球—工程地质学]