STABILITY CAPACITY CALCULATION OF CIRCULAR STEEL TUBE BEAM-COLUMNS UNDER BIAXIAL BENDING
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摘要: 利用ANSYS程序对不同端弯矩分布模式下圆钢管双向压弯构件的稳定承载力进行计算,并将计算结果与GB500172003《钢结构设计规范》中双向压弯构件稳定性计算公式的计算结果比较,指出直接套用现行规范公式将有较大误差。提出圆钢管双向压弯构件整体稳定性计算的建议公式,该公式适用于各种端弯矩分布模式下,圆钢管双向压弯构件的稳定承载力计算,计算精度较高。Abstract: By ANSYS program analysis,stability capacity was computed for circular tube beam-columns under axial compressive force and various biaxial end-moments with different distributions.The comparison of numerical results with the interaction formula in current design code GB 500172003 shows relative big errors.An improvement is presented,and the proposed interaction formula can be applicabe with high accuracy.
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Key words:
- circular steel tube /
- beam-column under biaxial bending /
- stable capacity /
- design code
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GB 500172003钢结构设计规范[S]. [2] 董柏平.圆钢管双向压弯稳定承载力分析[D].上海:同济大学,2009. [3] 陈骥.钢结构稳定理论与设计[M].3版.北京:科学出版社,2003. [4] ChenW F.梁柱分析与设计(第一卷平面问题特性及设计)[M].北京:人民交通出版社,1997. [5] Austin W J. Strength and Design of Metal Beam-Columns[J].Journal of Structural DivisionASCE,1961,87(ST4):1-32.
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