钢管混凝土柱偏心受压承载力计算方法探讨

Comparison of Calculation Methods for Bearing Capacity of CFSTC under Eccentrically Loading

讨论钢管混凝土柱偏心受压承载力计算结果 ,同时对计算方法进行了简要分析 .依据我国现行的 3本规程计算了 2组钢管混凝土偏压柱的承载力 ,计算中偏压柱选用标准单元柱 ,长细比 (L/D)从 3到 2 0 ,偏心距依次增大 ,对计算结果进行了比较分析表明 ,在长细比较小时 ,相同偏心距下 ,3本规程的极限承载力计算结果离散性较大 ;在中等及较大长细比时 ,其承载力计算结果较为接近 .

The calculation methods of bearing capacity of concrete filled steel tubular columns' under eccentrically loading and calculated methods are discussed. Taking two group of concrete filled steel tubular column as examples, the bearing capacity of the columns with the slenderness ratios from 3 to 20 is calculated. Columns are unit columns and their eccentricity increase step by step. The calculated results of bearing capacity of eccentrically\|loaded concrete filled steel tubular columns are compared and analyzed. Results show that the difference of the calculated results by three calculation methods is small, at the large slenderness ratio. Otherwise , the influence of slenderness ratios and eccentricity rations to bearing capacity is large.