平面钢框架非线性高温反应分析

Nonlinear Analyses of High-temperature Response for Plane Steel Frame

采用Eu ler-B ernou lli梁单元,考虑几何非线性和材料非线性以及温度沿截面高度的不均匀分布等因素,推导火灾条件下平面钢框架非线性分析的增量变刚度法相关公式,编制相应的计算程序,并进行具体算例的计算分析.算例计算结果与实验数据吻合.

Stiffness increment variation method is applied to analyze the nonlinear response of the plane steel frame subjected to fire. Euler-Bernoulli beam elements are adopted in theoretical analysis, and some effects, for example, the material nonlinearity, large displacement and nonuniform distribution of the temperature in the member are considered. The basic formula are obtained and the corresponding computational program is compiled. The computational results of the practical problems are agreement with the experimental data.