Simplified function of indoor gas explosion in residential buildings

- An original model of building load of indoor gas explosion has been presented.
- An incremental formula called simplified function of explosion has been developed.
- The function was optimized for three gases: methane, propane and hydrogen.
- The correctness of function has been verified in relation to real gas explosions.
- The correctness of function has been verified in respect of experimental research.

An original function describing the occurrence of indoor gas explosion in residential buildings has been presented in the paper. The function has been developed in order to simplify the description of explosion occurrence with its principal parameters, pressure and dynamics, being retained. It is a self-adaptative function, which means that its time function depends on the condition of construction elements, mainly decompressing areas called vents. The function consists of two parts. One is the phase of explosion pressure increase and the second is the decompression phase described by the fvent. modifier. The multiplication of the explosion pressure increase function and the fvent. modifier provides a final description of a pressure function for a vented explosion. The proposed function dependence enables an efficient dynamic analysis of three-dimensional models of building structures by means of the FEM.