2种邓肯-张模型对比研究  

Comparative Study of Two Duncan-Chang Models

作　　者：邓成发 刘检生 王良 DENG Chengfa;LIU Jiansheng;WANG Liang(Zhejiang Institute of Hydraulics and Estuary(Zhejiang Institute of Marine Planning and Design),Hangzhou 310017,Zhejiang,China;Zhejiang Provincial Key Laboratory of Hydraulic Disaster Prevention and Mitigation,Hangzhou 310017,Zhejiang,China;Yuyao Reservoir Management Service Center,Yuyao 315430,Zhejiang,China)

机构地区：[1]浙江省水利河口研究院(浙江省海洋规划设计研究院),浙江杭州310017 [2]浙江省水利防灾减灾重点实验室,浙江杭州310017 [3]余姚市水库管理服务中心,浙江余姚315430

出　　处：《浙江水利科技》2023年第6期63-66,共4页Zhejiang Hydrotechnics

基　　金：浙江省水利厅科技计划项目(RB2214);浙江省水利河口研究院院长基金项目(ZIHE21Y003)。

摘　　要：邓肯-张E-ν或E-B模型常用于土石坝应力、变形有限元计算。通过数值模拟与三轴试验的对比,验证计算结果与试验值的相符性,同时对比2种模型的差异。研究结果表明:2种模型的切线弹性模量具有一致性,但泊松比差异显著;同一围压下,应力水平较低时,E-ν模型泊松比较E-B模型大,应力水平较高时则相反;围压越大,泊松比越小;随着应力水平增加,E-B模型泊松比基本呈线性增加趋势,而E-ν模型关系曲线在应力水平较低时变化平缓,仅在高应力水平时曲线渐陡。Duncan-Chang E-νor E-B model is often used in the finite element calculation of stress and deformation of earth rock dam.Through the comparison between the numerical simulation and the triaxial test,the consistency between the calculated results and the experimental values was verified,and the differences between the two models were compared.The research results indicate that the tangent elastic modulus of the two models was consistent,but there was a significant difference in Poisson’s ratio.Under the same confining pressure,when the stress level is low,Poisson’s ratio of E-νmodel was larger than E-B model,but it was opposite when the stress level was higher.The larger the confining pressure,the smaller the Poisson’s ratio.With the increase of stress level,the Poisson’s ratio of E-B model increased linearly,and when the stress level was low,the change of the E-νmodel relation curve was gentle;and only when the stress level was high,the curve became steeper.

关 键 词：E-B模型 E-ν模型 泊松比 三轴试验 

分 类 号：TU43[建筑科学—岩土工程] TV641[建筑科学—土工工程]