异形柱轴压比限值的简化计算方法

Simplified Calculation Method of Ultimate Axial Compression Ratio for Irregularly-Shaped Columns

已往异形柱轴压比限值的计算均采用网格法进行截面积分.由于不规则截面不易划分网格,为此,文中提出一种截面不需划分网格计算异形柱轴压比限值的简化计算方法.基于平截面假设,采用一种新的简便的截面高斯积分法,对钢筋混凝土异形截面柱轴压比限值进行数值分析,并编制了相应的计算程序.将理论分析与其他文献分析结果比较,发现吻合较好.该简化计算方法无需迭代,计算简便直接.

In the calculation of ultimate axial compression ratio for irregularly-shaped columns, the grid method is usually applied to the cross-section integration. In order to overcome the difficulty in grid division, this paper proposes a simplified calculation method of the ultimate axial compression ratio without the grid division of cross-section. On the basis of plane assumption, a new and simple cross-section Gauss integration method is adopted to numerically analyze the ultimate axial compression ratio for reinforced concrete irregularly-shaped columns, with corresponding software being finally programmed. It is found that the theoretical analysis results are in good agreement with the ones presented in literature, and that the p method is simple, accurate and needless to iterate.