Nowadays, cross-arm truss structures made by cold-formed steel sections are used in power distribution networks. Although cold-formed steel structures have some advantages such as being lightweight and fast operation, they suffer from relatively low resistance against heat. This paper investigates the effect of elevated temperature on structural performance of cross-arm cold-formed steel structure based on experimental studies and additional numerical modeling. Furthermore, temperature-time curves of the structures were compared against thermal loading standards ISO834 and ASTM E119. For this purpose, the temperature-rotation curve of the structures and the effect of the initial vertical load before thermal loading on this curve were investigated. Also, temperature-rotation curves obtained in the laboratory as well as numerical modeling were studied and compared against each other.

如今，配电网络中使用由冷弯型钢制成的横臂桁架结构。尽管冷弯型钢结构具有重量轻、运行速度快等优点，但它们的耐热性相对较低。本文基于实验研究和附加数值模拟，研究了高温对横臂冷弯型钢结构性能的影响。此外，将结构的温度-时间曲线与热负荷标准 ISO834 和 ASTM E119 进行了比较。为此，研究了结构的温度-旋转曲线以及热载荷前初始垂直载荷对该曲线的影响。还，