钢曲杆在高温（火灾）下的力学特征数值分析

高温(火灾)环境下钢曲杆的受力和变形将会产生较大变化,对结构的力学特征影响较大。本文根据结构稳定理论和热力学原理,应用有限元分析方法,结合三种不同工况,分别探讨了高温(火灾)环境下不同支座形式、杆截面形式等因素对钢曲杆力学特征的影响,并对三种工况下钢曲杆力学特征进行了数值分析与对比,得出了H型钢截面无铰钢曲杆更加符合建筑安全要求的结论,研究成果可为钢曲杆抗火研究提供参考。

The numerical analysis of the mechanical characteristics of steel curved bar under the environment of high temperature (fire)

Under the environment of high temperature(ifre), the stress and deformation of steel curved bar(SCB) will be greatly changed, as well as its mechanical characteristics in the SCB structure . On the basis of the theory of structural stability and thermodynamics principle, we combine with three different conditions and discuss the inlfuence that factors such as different support forms under high temperature (ifre) and the cross section forms etc may have on the mechanical characteristics of steel bars . Then the mechanical characteristics of steel bars under three conditions have been discussed and analyzed by applying the ifnite element method. Then it is concluded that the H type steel section inarticulata curved rod is more in line with the requirements of the construction safety and the results will be valuable for study of the ifre resistance of SCB.