论文部分内容阅读
为了研究冷弯薄壁卷边槽钢组合工字梁的受弯性能,对三种截面形式共计9根卷边槽钢组合工字梁进行破坏性试验研究,建立有限元分析方法对试件进行模拟分析,有限元计算结果与试验结果吻合良好,验证了有限元方法的正确性。接着采用有限元方法对冷弯薄壁卷边槽钢组合工字梁进行大量参数分析,钢种和受压翼缘宽厚比对受压翼缘有效宽厚比的影响较大,梁的长度、腹板高厚比与板件厚度对梁受压翼缘有效宽厚比的影响小。最后在对典型截面梁构件进行参数分析的基础上,得出卷边槽钢组合工字梁受压翼缘板件的有效宽厚比计算表格与计算公式,提出计算冷弯薄壁型钢梁极限承载力的有效宽度法,并通过试验验证了有效宽度法计算梁极限承载力的正确性和适用性。
In order to study the bending behavior of cold-formed thin-walled curled channel I-beams, a total of nine cross-sectional forms of I-beam were tested for destructiveness. The finite element method The simulation results show that the calculated results agree well with the experimental results, and the correctness of the finite element method is verified. Then the finite element method is used to analyze a large number of parameters of cold-formed thin-walled curled channel steel I-beam. The ratio of the width and thickness of the steel and compression flange greatly affects the effective width-to-thickness ratio of the flange, The effect of plate thickness to thickness ratio and plate thickness on the effective width to thickness ratio of beam compression flange is small. Finally, based on the parametric analysis of typical cross-section beam members, the calculation formula and calculation formula of the effective width-to-thickness ratio of the flange plate with flanged channel I-beam are derived. The effective width method of the bearing capacity is validated and the correctness and applicability of the effective width method to verify the ultimate bearing capacity of the beam are verified.