钢管格构柱极限承载力计算方法研究

Calculation method of the ultimate bearing capacity of steel laced columns

应用ANSYS通用程序对钢管格构柱试验进行有限元分析,分析结果与试验结果吻合良好。对钢管格构柱极限承载力,进行了偏心率、长细比和构造参数的影响分析,对国内钢结构设计规程GB50017—2003的计算方法进行了评价和讨论,提出了相应的修正建议,最后在参数分析基础上,借鉴钢管混凝土格构柱,提出了四肢钢管格构柱极限承载力的合理实用的计算方法。

The universal program of ANSYS was adopted in the finite element analysis of steel laced columns.The calculating results of the specimens agreed well with the test results.The influence of eccentricity,slenderness ratio and constructional parameter on the ultimate bearing capacity was examined.The calculation methods in the design criteria for steel structure in China（GB 50017—2003） were discussed.Suggestion on modifying the equivalent slenderness ratio in this criterion was proposed.A rational and practical method to calculate the ultimate bearing capacity of four-element steel-laced columns was presented based on the parameter analysis.