钢筋混凝土地下粮仓仓壁土压力取值方法及仓壁结构受力分析  

Earth Pressure and Bearing Capacity Analysis on the Wall of Reinforced Concrete Underground Granary

作　　者：熊晓莉[1] 金立兵[1] 王振清[1,2] 

机构地区：[1]河南工业大学土木建筑学院,河南郑州450001 [2]河南工大设计研究院,河南郑州450001

出　　处：《应用基础与工程科学学报》2016年第1期103-114,共12页Journal of Basic Science and Engineering

基　　金："十二五"国家科技支撑计划(2011BAD03B01-3);粮食公益性行业科研专项(201413007)

摘　　要：钢筋混凝土地下粮仓仓壁承受土压力、水压力及结构自重等多种荷载的作用,其承载特性复杂.采用现场检测试验方法,对仓容100t的地下试验仓进行仓壁侧压力及仓壁结构受力检测试验.采用Rankine土压力理论比较静止、主动和被动土压力大小,对比仓壁侧压力的理论计算结果与实测结果,分析确定了钢筋混凝土地下粮仓仓壁土压力取值方法.分别采用圆柱壳模型分析法和有限元分析法计算地下试验仓仓壁竖向弯矩和环向力,研究钢筋混凝土地下粮仓仓壁结构受力特性,分析仓壁竖向弯矩和环向力分布规律,对比理论计算结果与实测结果后指出:仓壁土压力取值方法合理;仓壁结构受力的圆柱壳模型分析法和有限元分析法结果均与试验结果吻合较好;但仓壁与仓顶、仓底连接处因边缘约束效应的影响,受力状况比较复杂,建议采用有限元分析法对结构关键部位进行精细化受力分析.The wall of reinforced concrete underground granary is under the action of various loads,including pressure of soil,water,deadweight and so on,so that the wall has complex bearing characteristics.Object to the underground granary with 100 t storing capacity,the lateral earth pressures and the internal forces of the wall were tested by field test method. Contrasting the measured value of earth pressure based on the field test method with the static,active and passive earth pressure value based on Rankine earth pressure theory,the earth pressure on the wall of underground granary was determined.The radial moment and circumference force of wall were calculated by the simplified method of cylindrical shell model and the finite element analysis( FEA) method of integrated model. The wall bearing characteristics of the reinforced concrete underground granary were studied. The radial moment and circumference force distribution rule of the wall were analyzed. Several important conclusions were obtained by contrasting the theoretical values with the testing values of the internal forces of wall.Firstly,the date of earth pressure on soil wall of underground granary is reasonable.Secondly,the results of theoretical method coincide with those of field test method. Thirdly,because of the edge constraint effects,the distribution of internal forces is complex in the junctions between the wall and the top and between the wall and the bottom of the underground granary; therefore,it is recommended that the FEA method is selected to analyzing on the key position of the reinforced concrete underground granary.

关 键 词：钢筋混凝土地下粮仓 试验仓 仓壁 土压力 受力特性 

分 类 号：TU93[建筑科学—结构工程]