基于遗传算法的不同地下结构特征板跨最经济配筋研究

Research on the Most Economical Reinforcement of Different Underground Structure Characteristic Slab Span Based on Genetic Algorithm

文章建立了基于遗传算法的地下结构特征板跨最经济配筋率数学模型,将板最经济配筋率求解问题转化为最优化问题。数学模型考虑了承载能力极限状态和正常使用极限状态,分析了地下结构不同板跨、不同覆土厚度时最经济单位板宽费用、最经济配筋率变化规律,得到了最经济单位板宽费用拟合公式,再进一步研究了最经济板配筋率与钢筋、混凝土综合单价的关系,为地下结构板结构设计优化提供支持。

The article establishes a mathematical model for the most economical reinforcement ratio of underground structural feature slab span based on genetic algorithm,transforming the problem of solving the most economical reinforcement ratio of slabs into an optimization problem.The mathematical model considers both the ultimate limit state of bearing capacity and the limit state of normal use,analyzes the variation laws of the most economical unit slab width cost and the most economical reinforcement ratio under different slab spans and cover soil thicknesses of underground structures,obtains the fitting formula of the most economical unit slab width cost,and further studies the relationship between the most economical slab reinforcement ratio and the comprehensive unit price of steel bars and concrete,providing support for the optimization of the structure design of underground structure slab.