悬吊结构体系超高层建筑的防火设计分析

超高层建筑的悬吊结构体系采用外露式钢结构，需采用防火涂料等措施进行保护，但若按室内受火构件进行防火保护将造成一定程度的资源浪费。以某建筑为例，设定火灾发生在悬挑桁架楼层和标准重力楼层的场景，计算室外钢构件附近温度场，并与欧洲规范室外标准升温曲线进行对比，确定了最不利室外温升条件，计算钢构件在火灾下的受力情况和耐火性能。提出防火设计方案，并验证方案的可行性和经济性。

Fire protection design of a high-rise building with suspended structure system

External steel structures are applied on the suspended structure system of a high-rise building,and some fire protection measures such as fire resistive coating should be used to protect them from fire.However,if these external steel structures are regarded as indoor structures,it will cause waste of resources.Taking a building as an example,the scenes of fire in cantilever truss floor and standard gravity floor were set.The temperature field near the outdoor steel members was calculated and compared with the outdoor standard temperature rise curve of European code.The most negative temperature raise condition was obtained and the stress condition and fire resistance performance of steel components were calculated.Feasible fire protection scheme was put forward and the feasibility and economy of the scheme were verified.