Abstract
The analysis of a method for the design of reinforced concrete structures exposed to fire temperatures is presented in the article. The main essential factors which must be evaluated in the design of structures and their parts to provide their adequate carrying capacity and ability to prevent fire spread are analyzed. In fire design it is necessary to take into account the behaviour of structural system exposed to fire temperatures, the possible effect of heat and positive effects of active and passive protection systems against fire and the consequences of collapse of the structure. The method is intended for buildings, fire load is associated with the building and its use. At the same time thermal and mechanical actions for structures exposed to fire are considered.
Highlights
Bendrieji gaisrinës saugos reikalavimai gaisro atveju apriboti rizikà, kilusià asmeniniam, visuomeniniam ir kaimynø turtui, o prireikus ir aplinkai
The analysis of a method for the design of reinforced concrete structures exposed to fire temperatures is presented in the article
The main essential factors which must be evaluated in the design of structures
Summary
Bendrieji gaisrinës saugos reikalavimai gaisro atveju apriboti rizikà, kilusià asmeniniam, visuomeniniam ir kaimynø turtui, o prireikus ir aplinkai. Statybos gaminiø direktyvoje 89/106/EEC pateiktas toks esminis reikalavimas gaisro rizikai apriboti: statinius reikia taip suprojektuoti ir pastatyti, kad kilus gaisrui galima tarti, kad konstrukcijø laikomoji galia yra pakankama nustatytu laikotarpiu, ugnies ir dûmø susidarymas statinyje yra ribotas, gaisro plitimas á gretimas konstrukcijas yra. Statybiniø konstrukcijø projektavimo euronormø gaisro saugos dalyse nagrinëjami bûdingieji pasyviosios apsaugos nuo gaisro aspektai, taikomi projektuojant konstrukcijas ir jø dalis taip, kad jos bûtø pakankamos laikomosios galios ir reikiamai ribotø gaisro plitimà [1]. Laikanèiosios konstrukcijos, be gaisro atskyrimo funkcijø, turi bûti projektuojamos ir konstruojamos taip, kad jø atlaikymo funkcija R bûtø pakankama. Gaisro veikiamos konstrukcijos ir elementai su ugnies atskyrimo funkcijomis turi bûti projektuojami ir konstruojami taip, kad bûtø jø pakankamas sandarumas E neturi atsiverti dideliø plyðiø, susidaryti skyliø ir kitokiø ertmiø, kurios leistø gaisrui plisti á kitas patalpas; izoliavimas. I ðilumà izoliuojanèios savybës turi bûti tokios, kad gaisro sàlygomis neuþsidegtø tiesiogiai gaisro neveikiami konstrukcijø pavirðiai, apsisaugojimas gaisro nepaliestos pusës nuo ðilumos spinduliavimo
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