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根据钢筋砼双向压弯柱的工作机理,提出了用全过程非线性分析来研究双向压弯柱截面延性的方法,并编制了相应的计算机程序。通过对733根L形柱、733根T形柱和243根方形柱电算结果的分析,总结了L形、T形、方形截面双向压弯柱的截面延性规律,提出了这三种截面双向压弯柱的截面延性计算公式,并在此基础上,对轴压比、箍筋间距等一系列构造要求提出了设计建议。
According to the working mechanism of reinforced concrete biaxial bending columns, a method to study the ductility of biaxial compression columns was proposed by using the whole process non-linear analysis, and the corresponding computer program was compiled. Based on the analysis of the calculation results of 733 L-shaped columns, 733 T-shaped columns and 243 square columns, the section ductility rules of L-shaped, T-shaped, and square-section bi-directionally bending columns are summarized. Based on the calculation formula of the section ductility of the bending columns, and based on this, a series of design requirements for axial compression ratio, stirrup spacing, etc. are proposed.