钢框架中柱总温度应力计算模型研究

Calculate model study on the total thermal stress of the middle column in steel frame structure

为准确评估不均匀温升作用对钢框架中柱所产生的总温度效应,基于结构力学基本理论和前期试验研究基础,分析了在两种热作用模型下钢框架中柱由于约束作用和自身截面温差所产生的主要温度效应:受轴向约束所产生的温度轴力(应力)、相邻钢梁对柱顶施加的水平推力作用和钢柱截面温差所产生的温度弯矩作用。在此基础上给出钢柱总温度应力的计算模型。

In order to accurately evaluate total thermal effect of the middle column in steel frame structure,based on the basic theory of structural mechanics and the preliminary test research,three primary thermal effects of the steel frame middle column on two different temperature rising,due to the constraint effect and the temperature difference on the section itself,were analyzed and provided:the thermal axial force(stress)of axial compressed steel element;the horizontal thrust imposed by adjacent steel beams on the top of the column and the thermal bending moment produced by the temperature difference on the column section itself.Based on the study the calculate model of the total thermal stress was analyzed.