PERFORMANCE OF INFILL STIFFENED STEEL PANEL AGAINST BLAST LOADING

Abstract

IN BLAST LOADING OUT-OF-PLANE BEHAVIOR OF INFILL WALL IS ACTIVATED INITIALLY. INFILL STEEL PLATE WALL IN SPITE OF OTHER TYPES OF INFILL WALL SUCH AS BRICK OR CONCRETE WALL EXHIBITS MORE DUCTILITY. BLAST IMPUL-SIVE LOADING SUDDENLY EXERTS A LARGE AMOUNT OF KINEMATIC ENERGY TO INFILL WALL, ACCORDINGLY ENERGY ABSORPTION CHARACTERISTIC OF THE INFILL WALL SHOULD BE TAKEN INTO ACCOUNT ESPECIALLY FOR PROTECTION OF SENSITIVE BUILDINGS. OUT-OF-PLANE DUCTILITY OF INFILL STEEL PLATE, CAUS-ES REDUCTION OF TRANSMITTED IMPULSIVE LOADING TO STRUCTURE. IN THIS STUDY OUT-OF-PLANE BEHAVIOR OF INFILL STEEL PANEL HAS BEEN STUDIED AS A SACRIFICIAL ELEMENT. ALSO IN-PLANE BEHAVIOR OF INFILL STEEL PANEL AS A LATERAL BEARING SYSTEM IS INVESTIGATED. IN-PLANE ACTION SHOULD SATISFY BOTH OF RESISTANCE AND PERFORMANCE CRITERIA. IN THIS RE-SEARCH FINITE ELEMENT ANALYSIS INCLUDING GEOMETRIC AND MATERIAL NONLINEARITIES IS USED FOR OPTIMIZATION OF THE STEEL PLATE THICKNESS AND STIFFENERS ARRANGEMENT TO OBTAIN MORE EFFICIENT DESIGN FOR OUT-OF-PLANE AND IN-PLANE ACTIONS. THE RESULTS OF ANALYSES SHOW THAT FOR OUT-OF-PLANE ACTION, PLATE THICKNESS AND STIFFENERS ARRANGEMENT CAN BE DETERMINED SUCH THAT IN ONE HAND THE IMPULSE TRANSMIS-SION TO BE MINIMIZED, AND IN OTHER HAND THE MAXIMUM RESIDUAL DEFORMATION SHOULD BE LIMITED TO THE PREDEFINED DAMAGE LEVEL. IN ADDITION THE EFFECT OF STIFFENER ARRANGEMENT ON THE PERFORMANCE OF IN-PLANE ARE STUDIED AND SOME PRACTICAL RULE FOR DESIGN OF INFILL STEEL PANEL AGAINST BLAST HAVE BEEN DERIVED.