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浅圆仓散料侧压力的极限分析上限方法

ISSN号：1000-4750
期刊名称：工程力学
时间：0
页码：150-154
语言：中文
分类：TU476.4[建筑科学—结构工程;建筑科学—土工工程] O241[理学—计算数学;理学—数学]
作者机构：[1]School of Civil Engineering, Dalian University of Technology, Dalian 116024, China, [2]School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China, [3]State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics Chinese Academy of Sciences, Wuhan 430071, China
相关基金：Supported by National Natural Science Foundation of China （No. 50678032 and No. 90715042） and Key Project of Ministry of Education o China （No. 210176）.
相关项目：海洋土的工程特性及其地基的变形机理研究

关键词：加筋土挡墙, 模型试验, 数值分析, 力学性能, 加筋土挡土墙, 土工格栅, 台阶, 粘弹塑性模型, model test, geogrid, stepped reintbrced retaining wall, finite element method, visco-elasto-plasticity model

中文摘要：

模型测试和走的加固的挡土墙的数字分析被执行调查装填的流变学的效果并且在结构的长期的表演上 geogrids 爬。geogrid 紧张，土壤压力，墙变丑和基础压力在模型建设期间被测量并且装载。一个 visco-elasto-plastic 模型和一个实验非线性的粘弹性的模型被利用在长期的负担下面模仿增强 geogrid 的保留地球的墙的压力和变丑。由把测试数据与数字结果作比较，基础压力分发是非线性的，这被显示出，并且为装填的 geogrids 的侧面的限制能引起基础压力的再分配。土壤压力的曲线开始在每步是在外面凸的，并且它随后为垂直的墙的案例接近分发。在不同高度的 geogrid 紧张的变化趋势被获得。而且，失败机制和潜力的发展模式在挡土墙滑动表面被建议。

英文摘要：

Model tests and numerical analyses of stepped reinforced retaining wall were performed to investigate the effects of rheology of backfill and creep of geogrids on the long-term performance of the structure. The geogrid tensions, soil pressures, wall deformations and foundation pressure were measured during model construction and loading. A visco-elasto-plastic model and an empirical nonlinear visco-elastic model were utilized to simulate the stresses and deformations of geogrid-reinforced earth-retaining wall under long-term loads. By comparing test data with numerical results, it is shown that the foundation pressure distribution is nonlinear, and the lateral constraint of geogrids for backfill can cause a redistribution of foundation pressure. The curve of soil pressure is outside convex at each step initially, and it is close to the distribution for the case of vertical wall subsequently. The variation trend of geogrid tensions at different heights is obtained. Moreover, the failure mechanism and development mode of potential slip surface in retaining wall are proposed.

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