冷弯薄壁型钢柱局部与整体稳定相关作用的理论和试验研究

EXPERIMENTAL AND THEORETICAL STUDY ON INTERACTION BUCKLING OF THIN-WALLED COLUMNS

本文介绍了18根冷弯薄壁槽钢柱的相关屈曲试验观测结果,并简要地介绍了作者的理论分析方法。在试验过程中采用了先进的光栅技术,获得了加载过程中柱子壁板屈曲后的波形变化规律。基于试验与现行薄壁型钢规范的比较,提出了现行规范的修改建议式。

An experimental study on the local and overall interaction buckling strength of thin-walled channel section columns is presented in this paper.A total of eighteen columns with large width-thickness ratios were tested to failure. The advanced moire fringe method had been used in the process of experiment and some important conclusions on waveshape variation were obtained from a series of fringe patterns of buckled plates forming the column.A new analytical approach was also outlined and the details of theoretical formulation of equation were given in Ref,[1].The experimental results have been compared with author's theoretical solutions and P.R.C. current specification and a modified Perry's formula for designing centrally loaded channel section columns is proposed to predict the interaction buckling strength.