| 钢管混凝土格构柱极限承载力实用计算公式 |
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| 引用本文： | 周旺保,蒋丽忠.钢管混凝土格构柱极限承载力实用计算公式[J].中南大学学报(自然科学版),2011,42(11). |
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| 作者姓名： | 周旺保 蒋丽忠 |
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| 作者单位： | 中南大学土木工程学院,高速铁路建造技术国家工程实验室,湖南长沙,410075 |
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| 基金项目： | 国家自然科学基金资助项目，湖南省杰出青年基金资助项目 |
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| 摘 要： | 在理论分析基础上,提出钢管混凝土格构柱长细比折减系数计算模型及等效长细比计算公式,并改进等效长细比计算公式.同时,利用数值计算方法对不同混凝土强度、钢材强度、缀条横截面积、缀条布置形式、偏心率、长细比的钢管混凝土格构柱构件的承载力进行仿真计算,并在改进的等效长细比基础上,分析它们对长细比折减系数的影响.结合数值计算结果及长细比折减系数计算模型,提出长细比折减系数计算公式.利用本文提出的长细比折减系数计算公式及规程CECS28:90中双系数乘积公式对构件极限承载力进行计算,并与数值计算结果及试验结果进行比较.研究结果表明:在改进的等效长细比基础上,混凝土强度、钢材强度、缀条横截面积、缀条布置形式对长细比折减系数的影响很小,可以忽略；3种计算方法计算结果吻合良好,验证了本文提出的长细比折减系数计算公式的正确性.
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| 关 键 词： | 钢管混凝土 格构柱 计算方法 极限承载力 |
Practical calculation formula of ultimate load carrying capacity about concrete filled steel tubular laced columns |
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| ZHOU Wang-bao,JIANG Li-zhong.Practical calculation formula of ultimate load carrying capacity about concrete filled steel tubular laced columns[J].Journal of Central South University:Science and Technology,2011,42(11). |
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| Authors: | ZHOU Wang-bao JIANG Li-zhong |
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| Institution: | ZHOU Wang-bao,JIANG Li-zhong (National Engineering Laboratory for High Speed Railway Construction,School of Civil Engineering,Central South University,Changsha 410075,China) |
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| Abstract: | The slender ratio reduced coefficient model and the equivalent slenderness ratio calculation formula of the concrete filled steel tubular laced columns were proposed on the basis of theory analysis,and the equivalent slenderness ratio calculation formula was improved.A lot of ultimate bearing capacities of concrete filled steel tubular laced columns with different concrete strengths,steel strengths,lace bar areas,layout forms of lace bar,eccentricity ratio and slender ratio were computed using the numerical... |
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| Keywords: | concrete-filled steel tube(CFST) laced column calculation method ultimate bearing capacity |
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