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根据箱形基础底板钢筋应力的实测资料,结合相应的沉降及地基反力实测结果,本文分析了上部结构作用对箱基整体弯矩的主要影响因素,提出了箱基应力包络线的概念,将上部结构刚度对箱基整体弯矩影响的计算转化为上部结构荷载重分配的计算,给出了物理概念明确且易为一般工程设计人员应用的建议计算公式。
Based on the measured data of the steel bars stress in the box-shaped baseplate, combined with the corresponding settlement and ground force reaction results, this paper analyzes the main influencing factors of the effect of the superstructure on the overall bending moment of the box foundation, and proposes the concept of the stress envelope of the box foundation. The calculation of the influence of the stiffness of the superstructure on the bending moment of the box foundation is converted into the calculation of the redistribution of the load on the superstructure. The proposed calculation formula with a clear physical concept and easy application for general engineering designers is given.