Iman Tabaeh Izadi - Department of Civil Engineering, Faculty of Engineering, University of Shiraz, Shiraz, Iran.
Mohammad Hosayn Chaman - M.SC
Mohammad Sadegh Karimidoost - Department of Civil Engineering, Faculty of Engineering, Islamic Azad University: Fars Science and Research branch, University of Shiraz , Iran

The issue of protecting structure against blast loading is gaining interest in civil engineering. In this study the authors present a retrofitting scheme to prevent collapse of above-ground storage tank-liquid fuel oil system under blast loading. The proposed method to prevent collapse is summarized by retrofitting the steel tanks with vertical and radial stiffeners and cover plate. The computer program ABAQUS is used to model and analyze the steel tanks. Theinvestigation results show the effectiveness of the proposed retrofitting method for the steel tank example in this study. Analysis results show that maximum plastic strain, maximum displacement and critical mises stress is decreased for the retrofitted models. Also results showthat for the tanks subjected to the blast loading, the critical mises stress decreases with an increase in the oil levels

Steel tank- oil system; Blast; Retrofitting; Nonlinear dynamic; Finite elements