大跨度钢结构建筑的防火保护

大跨度钢结构与其它结构形式相比,具有强度高、自重轻、跨度空间大、灵活好用等明显的优势,因而被广泛地应用于建筑、桥梁、仓库、体育馆及候机厅等工程中。但大跨度钢结构耐火极限低,火灾中极易发生变形倒塌,因此必须进行有效的防火保护。目前普遍使用的保护方法是喷涂防火涂料,以便提高大跨度钢结构的耐火极限和使用安全性,延缓其在火灾中强度的降低速度,为灭火救援和人员疏散争取时间。文章通过对大跨度钢结构防火涂料的类型研究,为消防部门进行有效的火灾预防提供可靠的依据。

Fireproof Protection on the Long Span Steel Structure Construction

Compared to other forms of structure, the long span steel structure has many obvious advantages, such as higher intensity, lighter self-weight, bigger usable space, and better flexibility and so on, so it is widely applied to construction engineering, bridge structure engineering, storehouse, gymnasium, domestic airport and others engineering practices. However, the long span steel structure bears lower duration of fire resistance, so it is easily collapsed when the fire takes place, it is necessary to be fireproof protection. The all-pervading ways of fireproof protection is the fireproof coating, which can increase the duration of fire resistance and safety and reliability of the long span steel structure. Therefore, it can postpone the reduction of its intention during the fire and gain more time for firefighting and evacuation. Consequently, it is necessary to study on the selection of fireproof coating, and show great theoretical and practical significance for fire department in preventing of fire.