考虑地基土性质的箱型结构受力计算方法

Calculation Method of Box Structure Considering the Nature of Foundation Soil

以一箱型结构为例,利用Midas软件建立考虑地基土性质的有限元模型,通过有限元分析计算,分析了不同地基土性质对箱型结构各部位受力的影响,并与传统的箱型结构计算方法进行对比,对结构不同部位的构造和配筋方式提出建议。计算结果表明:地基土的性质直接影响着箱形结构的受力对底板及侧墙下部结构的受力影响较大。传统箱型结构标准图的配筋没有考虑基础形式,适用于较软弱的土层。当地基土性质较好时,对于底板及侧墙下部结构,建议通过详细的计算得出更精确的内力值,以减小底板配筋和侧墙底部的配筋,体现精细化设计,降低工程造价。

Taking a box structure as the example,a finite element model considering the nature of foundation soil is established by utilizing the Midas software.Through the finite element analysis and calculation,the influence of different nature of foundation soil on the stress of each part of the box structure is analyzed and compared with the traditional calculation method of box structure,and the suggestions on the structure and reinforcement method of different parts of the structure are put forward.The calculation results show that:the nature of foundation soil directly affects the stress of box structure,and has a great influence on the stress of the substructure of bottom plate and side wall.The reinforcement in the traditional box structure standard drawing does not consider the foundation form and it is applicable to the soft soil layer.When the nature of foundation soil is good,it is suggested to obtain more accurate internal force value for the substructure of bottom plate and side wall through the detailed calculation to reduce the reinforcement of the bottom plate and the bottom of the side wall,reflect the fine design and reduce the project cost.