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Physical and numerical modelling of strip footing on geogrid reinforced transparent sand
Geotextiles and Geomembranes ( IF 5.2 ) Pub Date : 2021-04-01 , DOI: 10.1016/j.geotexmem.2020.10.011 Jianfeng Chen , Xiaopeng Guo , Rui Sun , Sathiyamoorthy Rajesh , Song Jiang , Jianfeng Xue
Geotextiles and Geomembranes ( IF 5.2 ) Pub Date : 2021-04-01 , DOI: 10.1016/j.geotexmem.2020.10.011 Jianfeng Chen , Xiaopeng Guo , Rui Sun , Sathiyamoorthy Rajesh , Song Jiang , Jianfeng Xue
Abstract This paper presents the results of laboratory scale plate load tests on transparent soils reinforced with biaxial polypropylene geogrids. The influence of reinforcement length and number of reinforcement layers on the load-settlement response of the reinforced soil foundation was assessed by varying the reinforcement length and the number of geogrid layers, each spaced at 25% of footing width. The deformations of the reinforcement layers and soil under strip loading were examined with the aid of laser transmitters (to illuminate the geogrid reinforcement) and digital camera. A two-dimensional finite difference program was used to study the fracture of geogrid under strip loading considering the geometry of the model tests. The bearing capacity and stiffness of the reinforced soil foundation has increased with the increase in the reinforcement length and number of reinforcement layers, but the increase is more prominent by increasing number of reinforcement layers. The results from the physical and numerical modelling on reinforced soil foundation reveal that fracture of geogrid could initiate in the bottom layer of reinforcement and progress to subsequent upper layers. The displacement and stress contours along with the mobilized tensile force distribution obtained from the numerical simulations have complimented the observations made from the experiments.
中文翻译:
土工格栅加筋透明砂条形基础物理数值模拟
摘要 本文介绍了在用双轴聚丙烯土工格栅加固的透明土壤上进行的实验室规模板荷载试验的结果。通过改变钢筋长度和土工格栅层数(每层间距为基脚宽度的 25%)来评估钢筋长度和钢筋层数对加筋土基础荷载沉降响应的影响。借助激光发射器(照亮土工格栅加固)和数码相机,检查了带状荷载作用下加固层和土壤的变形。考虑模型试验的几何形状,采用二维有限差分程序研究条形荷载作用下土工格栅的断裂。加筋土地基的承载力和刚度随着加筋长度和加筋层数的增加而增加,但随着加筋层数的增加,增加更为显着。加筋土基础的物理和数值模拟结果表明,土工格栅的断裂可在加筋底层开始并进展到随后的上层。位移和应力等值线以及从数值模拟中获得的动员拉力分布与从实验中得出的观察结果相辅相成。加筋土基础物理和数值模拟结果表明,土工格栅的断裂可在加筋底层开始并进展到随后的上层。位移和应力等值线以及从数值模拟中获得的动员拉力分布与从实验中得出的观察结果相辅相成。加筋土基础的物理和数值模拟结果表明,土工格栅的断裂可在加筋底层开始并进展到随后的上层。位移和应力等值线以及从数值模拟中获得的动员拉力分布与从实验中得出的观察结果相辅相成。
更新日期:2021-04-01
中文翻译:
土工格栅加筋透明砂条形基础物理数值模拟
摘要 本文介绍了在用双轴聚丙烯土工格栅加固的透明土壤上进行的实验室规模板荷载试验的结果。通过改变钢筋长度和土工格栅层数(每层间距为基脚宽度的 25%)来评估钢筋长度和钢筋层数对加筋土基础荷载沉降响应的影响。借助激光发射器(照亮土工格栅加固)和数码相机,检查了带状荷载作用下加固层和土壤的变形。考虑模型试验的几何形状,采用二维有限差分程序研究条形荷载作用下土工格栅的断裂。加筋土地基的承载力和刚度随着加筋长度和加筋层数的增加而增加,但随着加筋层数的增加,增加更为显着。加筋土基础的物理和数值模拟结果表明,土工格栅的断裂可在加筋底层开始并进展到随后的上层。位移和应力等值线以及从数值模拟中获得的动员拉力分布与从实验中得出的观察结果相辅相成。加筋土基础物理和数值模拟结果表明,土工格栅的断裂可在加筋底层开始并进展到随后的上层。位移和应力等值线以及从数值模拟中获得的动员拉力分布与从实验中得出的观察结果相辅相成。加筋土基础的物理和数值模拟结果表明,土工格栅的断裂可在加筋底层开始并进展到随后的上层。位移和应力等值线以及从数值模拟中获得的动员拉力分布与从实验中得出的观察结果相辅相成。