轻型钢结构建筑火灾痕迹特性分析

Analysis of trace properties of light steel building fires

以单跨门式刚架结构为例,从轻钢结构建筑的材料性能、结构特点入手,依据火灾发生、发展规律,阐述了轻钢结构建筑火灾特有的弯曲变形痕迹、倒塌牵拉方向性痕迹、轻质围护材料火灾表面痕迹、微观金相火灾痕迹形成机理和勘查中的证明作用。

Based on the example of rigid door-shaped frame construction of single span, material qualities and capabilities and structure properties of light steel construction and the regularity of fire break-out and spread, this paper discusses the forming procedure of the unique trace, bent and shape-changed, and of the direction trace by collapse pulling related to light steel building fires, It also explains the forming procedure of the surface trace by light cover-protection material fires and by metallurgy material fires. All these traces serve as evidence during on-the-spot investigation.