大空间结构防火性能化设计方法研究

Studies on performance-based fire-resisting design method for large-space structures

大空间结构能够提供广阔的内部使用空间,且造型美观宏伟,特别适合于体育馆、机场、展览馆等大型公用建筑及一些工业设施,具有其它结构形式无可比拟的优越性.随着2008北京奥运等大型盛会的即将召开,这种结构形式在我国得到了迅速蓬勃的发展,并在未来一段时期内仍具有极大的发展潜力.然而,由于此类建筑其结构体系多较为复杂,加上建筑使用和造型上的需要,常常造成很难根据我国现行的建筑防火类规范进行防火设计,从国内外近年来研究工作和发展趋势来看,性能化设计方法将是此类结构防火设计的首选.本文针对此类结构的具体特点,结合国内外研究成果和工程相关实践经验,深入分析此类结构防火性能化设计的主要步骤和方法,希望能够对此类结构未来防火设计与研究提供一定的借鉴作用.

Large-space structures, which could provide spacious room and gorgeous configurations, have prodigious superiority over other structural styles. This kind of structure will definitely have a flourishing development and tremendous potentiality in future by the propulsion of large campaigns such as 2008 Beijing Olympic Games. However, traditional fire-resisting method in codes and regulations in China nowadays can not be applied to large-space structures as the structural systems thereof are mostly sophisticated or sometimes there are special aesthetic demands on architectural employment. From studies and development trends in this area over the world, performance-based design method will be the prior choice. In this paper, analysis and discussions will be focused on the steps and methods for this kind of structure in terms of its features, research findings and practical experiences in China and overseas. Some suggestions are proposed finally.