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

Abstract:

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.

Key words:coldformed thinwalled steel; effective area; buckling coefficient of plate element; stiffened element with intermediate stiffeners