摘要
三峡库区滑坡的变形失稳过程不仅与库水变动产生的渗流场变化相关,还与蠕变效应关系密切,而常规流固耦合模型未考虑蠕变效应。对此,通过Laplace逆变换求得蠕变模型的松弛模量解析解,考虑蠕变效应且基于ABAQUS的流固耦合模型二次开发,即在常规流固耦合模型基础上将弹性模量替换成蠕变松弛模量。分别用二次开发程序和常规流固耦合方法对三峡库区典型滑坡土体的渗流与蠕变耦合试验进行模拟,结果表明,二次开发程序所求最终位移大于常规方法所求值,其值更接近于试验值,更符合滑坡土体流固耦合真实情况。
The deformation and instability process of the landslide in the Three Gorges reservoir area is not only related to the change of seepage field caused by reservoir water fluctuation,but also related to creep effect.However,the creep effect is not considered in the conventional fluid-solid coupling model.Therefore,the analytic solution of the relaxation modulus of the creep model was solved by Laplace inverse transformation.Based on the ABAQUS,the secondary development of fluid-solid coupling model was carried out considering creep effect.It was that the elastic modulus was replaced by the creep relaxation modulus on the basis of the conventional fluid-solid coupling model.The seepage and creep coupling tests of typical landslides in the three gorges reservoir area were simulated by the secondary development program and the conventional fluid-solid coupling model.The final displacement obtained by the secondary development program is higher than that of the conventional method,which is closer to the test value and more in line with the real situation of fluid-solid coupling of landslide soil.
作者
江明
王世梅
李高
王琳
余文鹏
JIANG Ming;WANG Shi-mei;LI Gao;WANG Lin;YU Wen-peng(College of Civil Engineering and Architecture,China Three Gorges University,Yichang 443002,China;Hubei Provincial Academy of Building Research and Design Co.,Ltd.,Wuhan 430071,China)
出处
《水电能源科学》
北大核心
2020年第6期124-127,共4页
Water Resources and Power
基金
国家自然科学基金项目(41372359)
中国地质调查局项目(DD20190716,DD20190638)
三峡大学学位论文培优基金项目(2019SSPY024)
三峡后续工作地质灾害防治科学研究项目(0001212020CC60002)。
