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    肖建莊  張建榮    （同濟(jì)大學(xué) 上海 200092）

    秦燦燦                  （浦東國際機(jī)場 上海 201202）

[提要]  推導(dǎo)并計(jì)算了混凝土柱截面在界限破壞條件下的軸壓比，討論了箍筋約束、周邊縱向鋼筋、“芯筋”和其他因素對(duì)柱軸壓比限值的有利影響。針對(duì)目前高層鋼筋混凝土結(jié)構(gòu)抗震設(shè)計(jì)中遇到的突出問題之一——框架桂軸壓比超限現(xiàn)象，提出了一些設(shè)計(jì)建議。
[關(guān)鍵詞]  框架柱 軸壓比限值 界限破壞

According to the bound failure condition of the rectangular cross section, the limit value of axial compressive ratio for concrete frame columns is analyzed concerning with the factor of longitudinal reinforcement, composite stirrups and core reinforcement etc.. Finally, some suggestions on the limit values of axial compressive stress ratio for frame columns are recommended.
Keywords:  frame columns;limit values; axial compressive stress ratio; bound failure