冷弯薄壁型钢中间加劲板件有效面积计算方法

Estimation Method for Effective Area of Cold-formed Thin-walled Steel Plate Elements with Intermediate Stiffeners

基于超薄壁高强冷弯型钢槽形截面轴压构件承载力试验研究,参考美国冷成型钢结构构件设计规范、澳洲冷成型钢结构规范和北美冷成型钢结构构件设计规范的计算方法,并结合我国现行《冷弯薄壁型钢结构技术规范》的三类不同加劲板件的有效面积计算公式,对中间加劲板件有效面积的合理计算方法进行了探讨,提出了与我国现行规范有效面积计算方法相一致的中间加劲板件有效面积的计算方法———等效板件法.最后,通过与试验结果的比较分析,验证了其合理性和实用性.

Based on the experimental investigations of load-carrying capacities of super thin-walled high-strength cold-formed steel channel columns with intermediate stiffeners in web subjected to axial compression,the calculation method for the effective area of cold-formed thin-walled plate elements with intermediate stiffeners was discussed with reference to the related calculation formulas,and an equivalent element method（EEM）,for estimating the effect area of cold-formed thin-walled steel plate element with intermediate stiffeners consistent with estimated method for three different stiffened element was put forward.Finally,a comparison of the experimental results with the theoretical analysis shows that the proposed method is effective and suitable for Chinese cold-formed thin-walled steel specification.