Blast Mitigation of SDOF systems by using M.R.Damper and Base Isolations

Abstract

Shelter is a basic need for living creatures. The shelter should be safe and secure. The damage of the shelter occurs due to natural hazards and manmade activities. Natural hazards such as earthquake, volcanic eruptions, landslides, flood, etc. Manmade activities may be accidental or intentional. Accidental activities include, internal explosions such as chemical reactions occurring at nuclear power plants, mining, rock cutting etc, gas explosions leakage etc. Hence while designing the structure, additional precautions and considerations should be taken to resist the unpredictable load. Boat load and earthquake load are dynamic, impulse loads. The earthquake load occurs in seconds, In the height of the structures force are distributed and is proportion to mass concentrations, blast load occurs in milli seconds compare to seismic load. In the present study SDOF system exposed to blast load is considered. MATLAB simulation technique is used in the analysis of the SDOF system. The SDOF system consists of Front wall, rear wall and Roof. The load is acting on the structural system are calculated by using analytical method. Base isolations method is one the recent method is used to reduce the response of the structural system under impact load. The semi active control system is used in the analysis. The response is reduced by considerable amount by using Base isolation and MR Damper.