论文部分内容阅读
结构火灾安全可以避免建筑物在火灾中坍塌。火灾热环境影响建筑结构的响应,传统的标准火灾环境有一定的局限性,不能完全适用于若干真实火灾场景。因此有必要开展真实火灾环境下建筑结构的热-力响应特性研究,发展有效的工程工具来设计经济安全的结构。近来,性能化的结构火灾安全设计评估方法和相应技术发展迅速,该文给出一种综合考虑热-力耦合作用的结构火灾安全设计评估方法及相应流程。首先通过建筑和燃料特性来预测可能的火灾热环境特性,然后再分析构件和结构的热响应和力学响应特性来判定结构是否会失效,以及可以降低热和力影响的预防失效措施。该文通过案例分析将该方法应用于某中庭钢结构屋顶的防火保护,得到经济合理的防火涂层设计,满足有关防火规范的安全等价要求。
Structural fire safety can prevent buildings from collapsing in a fire. The fire thermal environment affects the response of the building structure. The traditional standard fire environment has some limitations and can not be fully applied to several real fire scenarios. Therefore, it is necessary to study the thermo-mechanical response of building structure under real fire environment and to develop effective engineering tools to design the structure of economic security. Recently, the performance-based structural fire safety design assessment methods and corresponding technologies have been rapidly developed. This paper presents a structural fire safety design assessment method and its corresponding flow that takes into account the thermo-mechanical coupling. First, predict the possible thermal characteristics of the fire environment through the characteristics of buildings and fuels, and then analyze the thermal and mechanical response characteristics of components and structures to determine whether the structure will fail, and prevent failure measures that can reduce the effects of heat and force. Through case analysis, the method is applied to the fire protection of steel roof of atrium, and the economical and reasonable fireproof coating design is obtained, which meets the safety equivalence requirements of fire protection code.