广义塑性模型适用性初探  

On applicability of generalized plastic model

作　　者：闫尚德 汪志升 YAN Shangde;WANG Zhisheng(Sinohydro Bureau 3rd Co.,Ltd.,Xi’an 710000)

机构地区：[1]中国水利水电第三工程局有限公司,陕西西安710000

出　　处：《中国建材科技》2022年第2期99-106,共8页China Building Materials Science & Technology

摘　　要：为验证筑坝材料广义塑性模型在土石坝数值仿真分析中的适用性,以四川猴子岩高面板堆石坝为例,分别采用邓肯E-B模型和广义塑性模型对面板堆石坝进行三维数值模拟计算,并与现场监测数据进行对比。结果表明,竣工期广义塑性模型计算所得堆石体水平向位移及竖向沉降均小于邓肯E-B模型,坝体第一主应力计算结果基本一致,第三主应力E-B模型计算结果小于广义塑性模型;正常蓄水位期,水荷载作用下广义塑性模型预测的坝体水平向变形及面板挠度较邓肯E-B模型小,面板应力较邓肯E-B模型大。两种模型计算所得坝体变形及应力分布规律基本一致,广义塑性模型计算结果比邓肯E-B模型更接近现场监测数据。两种模型的数值计算与实测资料基本吻合。In order to verify the applicability of the generalized plastic model of dam building materials in the numerical simulation analysis of earth rock dams,taking Houziyan high face rockfill dam in Sichuan as an example,the threedimensional numerical simulation calculation of face rockfill dam is carried out by using Duncan E-B model and generalized plastic model respectively.The numerical simulation results are compared with the field monitoring data.The results show that the horizontal displacement and vertical settlement of rockfill calculated by generalized plastic model during the completion period are less than those calculated by E-B model.The results of the first principal stress of the dam calculated are basically the same,but the results of the third principal stress calculated by E-B model are less than those calculated by generalized plastic model.During the normal pool level period,the horizontal deformation and slab deflection predicted by generalized plastic model under water load are smaller than those predicted by E-B model,and the slab stress predicted by generalized plastic model is larger than those predicted by E-B model.The dam deformation and stress distribution laws calculated by the two models are basically consistent.The numerical calculation results of generalized plastic model are closer to the field monitoring data than E-B model.The numerical calculation laws of the two models are basically consistent with the measured data.

关 键 词：广义塑性模型 邓肯E-B模型 数值仿真分析 适用性 

分 类 号：TU43[建筑科学—岩土工程] O344[建筑科学—土工工程]