- 摘 要
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杜永峰 狄生奎 宋 或 李 慧 （甘肅工業(yè)大學 蘭州 730050）許鐵生 （西安交通大學 710049）
[提要] 采用能量變分原理與多重子結構技術相結合的方法，建立了考慮上部結構與箱基、地基土共同工作的箱基內(nèi)力空間分析模型。特別提出了上部結構為框架一剪力墻體系時箱基內(nèi)力的實用算法。在空間內(nèi)力分析的基礎上，建立了箱形基礎造價優(yōu)化的數(shù)學模型，并采用子空間組合可行方向法求優(yōu)。所提出的優(yōu)化方法應用于工程實例，取得了明顯的經(jīng)濟效益。
[關鍵詞] 箱形基礎 最優(yōu)設計 相互作用 鋼筋混凝土結構 變分法By combining variational method with multi-level substructure technique,a spatial analysis model is established to calculate the internal forces of box foundation considering its interaction with superstructure and soil. Especially,a practical algorithm is worked out for analyzing box foundation with superstructure of frame-shear walls.Based on spatial analysis,a mathematical model is derived to minimize the price of box foundation.By applying the optimization method presented to the numerical example, the structural cost of box foundation is apparently reduced.
Keywords: box foundation; optimum design; reinforced concrete structure; variational method
