Assessment of the response of prefabricated house to the explosion of gas-air mixture

Abstract

vapor in the air. Throughout we have to take into consideration both the transfer of blast waves parameters (high overpressures and temperatures) from non-load bearing elements of the structure to load bearing elements and afterwards their reactions. The pressure caused by an internal explosion depends mainly on the type and homogeneity of explosive mixture, on its concentration, ignition source, on the turbulence caused by internal objects and on the size and quantity of the explosive mixture participating on the explosion effect. If the building should be relieved suf fi ciently from the effects of the explosion, it must be equipped with the necessary amount of exhaust (relief, vent) areas. For exhaust components, we can consider light roofs, walls, or even sub-areas in the external structures such as windows and doors. For windows and doors, we have to take into account the risk of personal injury caused by broken glass or frames of the fi lling shattered during the explosion ( Č SN EN 1991-1-7, 2007). Abstract: In this contribution, simple computational approaches to the determination of blast load and its effects on the structure of prefabricated house are proved. Blast waves parameters are de fi ned for chosen room during natural gas escape. Blast load parameters are calculated by several methods. Estimation of its effects on the structure is modelled using numerical modelling.