摘要
Abstract
In the fire resistance design of steel structures , there are many methods to calculate the stability coefficient for axially compressed steel members. The methods are usually toilsome and not convenient. To find a simple and practical method, a comparative study of stability coefficient calculation is made on three common methods ((ψ)τ = (ψ),(ψ)τ =α(ψ),(ψ) τ = αc(ψ)). In order to validate the accuracy of these methods, a series of tests for axially compressed steel columns with different slenderness ratios ( λ=30, 49 , 68 , 84) were carried out under high temperatures. By comparing calculation results with experimental data, the results show that the method of replacing stability coefficient at normal temperature with that at high temperature is simple and practical for steel members with slenderness ratio more than 68. But the stability coefficient will be too big when the slenderness ratios of steel members are smaller than 68, in that case the stability coefiicient needs to be modified in the practical applications.关键词
钢构件/轴心受压构件/高温/整体稳定系数Key words
steel member/ axially compressed member/ elevated temperature/ stability coefficient分类
建筑与水利
