FIRE SAFETY CHECK OF EXISTING TALL OFFICE BUILDINGS APPLYING FIRE ENGINEERING APPROACH: A CASE STUDY

摘要

The topic of this paper is the application of Structural Fire Engineering to an Italian existing tall office building in order to evaluate the actual fire safety conditions.The building is equipped with different fire protection systems, therefore the additional aim of the thermo-mechanical analyses has been the evaluation of the effectiveness of different fire protection systems as well.It has to be noticed that a passive protection system can be used like fire protection system if its characteristics are "certified" through an experimental campaign, which proves the effectiveness of the system in case of fire.The knowledge of thermal characteristics enables to apply advanced calculation models for the assessment of structural fire resistance.Nevertheless, in case of existing building, that characterization is not usually available, even if the certificates of fire resistance are provided.In this case,the proposed approach, shown in the following, is a kind of "back analysis ", which enables to find the material's thermal characteristics on the basis of experimental results carried out to provide the REI certification.In this paper, the back analyses carried out on different fire protection systems as calcium-silicate carter, mineral fibre ceiling and intumescent paints.These systems were applied in Italy during the 90 's.