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本文建议用子结构法凝聚上部结构的荷载和刚度,同时用有限分层地基模型确定土体的刚度和基底反力,并计及基础自身的刚度影响,进而对箱基进行较全面的内力分析。 在此基础上,选择板、壁的厚度和钢筋用量作为设计变量,并采用可变容差法对箱基进行优化设计。利用本文编制的程序BFOD—88进行计算,所得结果比现行设计方法算得的数值降低造价13％以上。
In this paper, the substructure method is proposed to condense the load and stiffness of the superstructure. At the same time, the stiffness and base reaction force of the soil are determined by the finite layered foundation model, and the stiffness effect of the foundation itself is taken into account. Then the internal force of the box foundation is analyzed more comprehensively. . On this basis, the thickness of the plate, the thickness of the wall, and the amount of steel reinforcement were selected as design variables, and the variable-tolerance method was used to optimize the design of the box foundation. By using the program BFOD-88, which was compiled in this paper, the results obtained are lower than the value calculated by the current design method by 13% or more.