Analysis Of The Fire Resistance Of Rectangle-plane Air-supported Structure

Air-supported membrane structure has been widely used in civil and abroadoversea because of the advantages of its light-weight, economical, convenientconstruction, environmental protection and elegant appearance， in whichrectangular-plane air-supported structures is most adopted. The studies on theair-supported structures are mainly concentrated on static and dynamic performanceanalysis at room temperature by now. And the structural response and risk assessmentunder fire conditions are few concerned with. So temperature distributions on themembrane surface, the law of the smoke flowing and the fire response behavior of thestructure are investigated using FDS and ANSYS program in this paper. The results canbe referenced for similar designer.Firstly, fire field of the rectangular air-supported structure has been investigated.Matching to different building function, two kinds of fire fields are configured, whichare warehouse and public building fire field. Then, the characteristics of temperaturefields for a warehouse under various fire power and fire source location are analyzed.And the temperature on membrane surface is obtained. Besides, evaluation of fire riskfor public structure is studied according to the law of the smoke flowing under differentvent position. The results show that indoor temperature and the heat environmenttemperature on membrane surface can be reduced effectively when the fire exit doorand the fan are open. And the height of the local smoke layer is raised with the increasein buoyant of the smoke, but the visibility is reduced significantly.Secondly, the transient thermal analysis of the structure is performed by choosing adisadvantageous situation. And temperature curves of the membrane and reinforced cable are obtained.Finally, according to the temperature curve of the membrane and cable, fireresponse behavior of the structure is studied under different fire source location,insulation layer thickness and cable network layout when Q=10MW, which is includingstress, displacement and anchoring force. And some useful conclusions are drew.