方形钢管混凝土轴压短柱承载力的简化计算
Simplified Calculation of Ultimate Strength for Axial-Loaded Square CFT Stub Columns
摘要:
本文分析了方形钢管混凝土轴压短柱的受力机理，借鉴约束混凝土的本构关系，提出方形钢管混凝土轴压短柱承载力计算的简化公式。基于试验结果，对所提公式中的钢管纵向强度折减系数和混凝土强度提高系数进行回归分析。用建议公式对方形钢管混凝土轴压短柱进行承载力计算，计算结果与试验和规范计算结果吻合良好。
Abstract:
In this paper, the bearing mechanism of axial-loaded square concrete-filled steel tube (CFT) stub column is analyzed. The simplified calculation formula for this type of component is proposed ac-cording to the typical constitutive model of confined concrete. Then, based on the experiment re-sults, two key parameters of the proposed formula such as the reduction ratio of steel longitudinal stress and the coefficient of enhance for concrete are analyzed and determined. Finally, the expe-riment elements are calculated by the proposed formula, and the calculated results are agreed with the experiment and criterion ones very well.
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