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采用能量变分原理与多重子结构技术相结合的方法,建立了考虑上部结构与箱基、地基土共同工作的箱基内力空间分析模型.特别提出了上部结构为框架-剪力墙体系时箱基内力的实用算法.在空间内力分析的基础上,建立了箱形基础造价优化的数学模型,并采用子空间组合可行方向法求优.所提出的优化方法应用于工程实例,取得了明显的经济效益.
Based on the combination of energy variational principle and multi-substructure technique, a model for analyzing the internal force of box foundation considering the interaction of superstructure with box foundation and foundation soil is established. In particular, the box foundation Based on the analysis of internal force in space, a mathematical model of box-based cost optimization is established, and the sub-space combination of feasible direction method is used to optimize the model.The proposed optimization method is applied to the engineering example and the obvious economy benefit.