摘要
由于岩土介质的复杂多样性,通用分析软件所提供的岩土流变本构模型往往不能满足工程实际数值分析的需要。基于广义西原粘弹塑性流变模型有限元理论格式,根据ABAQUS的UMAT格式要求,编制相应的接口程序,将广义西原粘弹塑性流变模型引入ABAQUS中。通过单轴压缩蠕变数值试验验证了二次开发的广义西原粘弹塑性流变模型程序是正确的。最后对一过江盾构隧道进行粘弹塑蠕变计算,得到管片不同位置处位移随时间的变化规律。本文的二次开发的研究成果可以用来解决岩土工程数值计算问题,同时所提出研究思路具有普遍性,为采用ABAQUS平台进行其他本构模型的二次开发提供了借鉴和参考。
Because of the complexity and variety of geotechnical material,the rock-soil rheology constitutive models in existing FEM software can′t usually satisfy the requirement of actual numerical analysis.Based on finite element theoretical scheme of generalized Nishihara viscoelastic-plastic rheological constitutive model,and according to the UMAT interface requirement of ABAQUS,the corresponding UMAT codes are programmed,which will be called by the main analytical module of ABAQUS.The creep case of unaxial test is used to verify the right and credibility of program compiled.Finially,through the viscoelastic-plastic creep calculation of circular shield tunnel cross the river,the variation with time of displacement at the different location of segment is obtained.The secondary development can be used to solve large-scale geotechnical engineering problems,at the same time,the provided basic procedures and programming essentials of the UMAT redefining in ABAQUS are universal and can offer a reference for other developers.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2010年第S2期324-329,共6页
Journal of Building Structures
基金
国家重点基础研究发展计划(973计划)项目(2007CB714202)
关键词
岩土工程
广义西原模型
粘弹塑
UMAT
geotechnical engineering
generalized Nishihara model
viscoelastic-plasticity
UMAT
