屈曲
非线性系统
材料科学
边值问题
瞬态(计算机编程)
结构工程
尼氏法
微分方程
机械
传热
产量(工程)
瞬态响应
复合材料
数学
工程类
数学分析
物理
计算机科学
电气工程
操作系统
量子力学
作者
Yongan Ren,Ruili Huo,Zhiyong Wu,Lee S. Cunningham,Ding Zhou
标识
DOI:10.1016/j.apm.2023.07.006
摘要
This paper presents time-varying flexural buckling and post-buckling responses of tapered columns under a transient fire of which the temperature is non-uniform along the length. First, the transient temperature field within the column is determined by solving a dimensionally reduced transient heat transfer problem considering the convection-radiation boundary conditions and temperature-dependent (TD) material properties. Subsequently, the von Kármán geometric nonlinear theory is applied to obtain the nonlinear equilibrium equation. The nonlinear heat transfer and equilibrium equations are solved by the differential quadrature (DQ) method. According to a yield criterion, the ultimate load at which the material failure occurs is predicted. The influences of a transient localised fire on the temperatures, buckling and post-buckling responses of tapered steel tubular columns are discussed.
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