The equivalent time of fire exposure in a historical building

作者：Orta B^*

来源：Informes de la Construccion, 2010, 62(520): 57-66.

DOI：10.3989/ic.09.060

• Building structures
• Equivalent time
• Fire resistance
• Technical Building Code
• Security against fires

When fire resistance of a structure is analysed, by means of Technical Building Code (CTE), it is possible to use simplified methods that fix values of resistances demanded from the structure, depending on use and building height of evacuation, independently of the sector, or it is possible to use the method of the equivalent Time that allows to consider the particular conditions of the studied sector (size, ventilation, structural material, active measures of fight against the fire, etc.). In most of projects the first route will be chosen, nevertheless when it is a question of a singular building that it needs a more detailed analysis, it will be appealed to the second one.
This article exposes the difficulty of applying the method of the equivalent time by means CTE without consulting the Eurocode-1 (EC-1) or technical manuals. It is exposed up to where the Spanish norm comes and when it is necessary to come to the European one. The method is applied to a specific example, a space in two heights by a horizontal hollow in cover. Also it shows as the method of the equivalent time, as alternative, can generate a series of results with a wide dispersion of values obtained from the quantity of decisions that the rules allows depending on a few criteria that are not rigid. This diversity of results can make not learned person who does calculations, perplex.
To finish conclusions on the obtained values are extracted and one thinks about the application of the method and the technician responsibility.

• 出版日期2010-12