Research On Efficiency Of Key Parameters Of Blast-resistance Coating In Petrochemical Buildings

The explosion accidents in petrochemical sites show that the damage caused by the explosion accidents is very huge,which often causes enormous casualties and economic losses.However,only a few newly-built petrochemical enterprises or installations in the field of petrochemical industry in China have considered the explosion-proof safety design of occupied sites.But in most of the internal personnel buildings closed to production installations.only the fire-proof requirements of buildings have been considered,and the explosion-proof requirements of buildings have not been fully considered,because of the early construction time.At present,the main methods to improve the explosion resistance of buildings in petrochemical sites are blast-resistance structure designing and spraying blast-resistant coating.Although the blast-resistant structure designing can obviously improve the blast-resistance ability of buildings,it has the disadvantages of long construction period,low efficiency,occupying space and high cost.The spraying blast-resistant coating has the advantages of low cost and convenient maintenance.Firstly,based on the current actual petrochemical buildings,the blast-resistance coating scheme design of petrochemical buildings is carried out.The spraying methods of the blastresistance coating are attack-facing spraying,back-explosion spraying and double-sided spraying.The thickness of the blast-resistance coating is 3mm,5mm and 8mm.The blastresistance coating material has been determined and the material parameters has been measured.The construction process of the blast-resistance coating has been determined.Secondly,based on the current actual petrochemical buildings,performance simulation of the blast-resistance coating is carried out through the thickness and the spraying method of the blast-resistance coating by using ANSYS/LS-DYNA software.The results showed that the blast-resistant coating can effectively reduce the displacement and speed of the wall,effectively improve the blast-resistant ability of the wall,prevent the collapse of the wall and the splash of debris;the increasing of spraying thickness can effectively improve the blast-resistant performance of the wall.The blast-resistant performance of the attack-facing spraying is better than that of the back-explosion spraying,and the blast-resistant performance of the doublesided spraying is better than that of the attack-facing spraying.Finally,in order to verify the rationality of the performance simulation of the blast-resistant coating,the performance test of the blast-resistant coatings is carried out.The test plan has been determined,and the test platform has been built.The result showed that the blast-resistant coating can effectively improve the blast-resistant ability of the wall,prevent wall collapse and debris splash,and effectively reduce casualties.The experiment has verified the rationality of the simulation.