ON THE EFFECT OF THE NEAR FIELD RECORDS ON THE STEEL BRACED FRAMES EQUIPPED WITH ENERGY DISSIPATING DEVICES
Keywords:YIELDING DAMPERS (ADAS), STEEL BRACED FRAME, ENERGY DISSIPATION DEVICES, NEAR-FAULT RECORDS.
THE BEHAVIOR OF BRACED STEEL FRAME STRUCTURES IS OF SPECIAL IMPORTANCE DUE TO ITS EXTENSIVE USE. ALSO THE APPLICATION OF ACTIVE AND SEMI-ACTIVE CONTROL SYSTEMS, REGARDING TO THEIR BENEFITS IN OBTAINING BETTER SEISMIC PERFORMANCE HAS INCREASED SIGNIFICANTLY. THE MAJORITY OF THE WORKS ON STEEL STRUCTURES AND STEEL CONNECTIONS HAS BEEN DONE UNDER FAR FIELD RECORDS, AND THE BEHAVIOR OF STEEL FRAME STRUCTURES EQUIPPED WITH YIELDING DAMPERS UNDER THESE CIRCUMSTANCES HAS NOT YET BEEN FULLY ANALYZED. THE MAIN PURPOSE OF THIS PAPER IS TO DETERMINE THE BEHAVIOR OF STRUCTURES EQUIPPED WITH YIELDING DAMPERS, LOCATED IN NEAR FIELD BASED ON ENERGY CONCEPTS. IN ORDER TO OPTIMIZE THEIR SEISMIC BEHAVIOR, THE CODES AND SOLUTIONS ARE ALSO PRESENTED.THE SELECTED SYSTEM IS A BRACED STEEL FRAME SYSTEM WHICH IS EQUIPPED WITH YIELDING DAMPERS AND THE ANALYSIS IS PERFORMED USING THE "PERFORM 3D V.4" SOFTWARE AND THE CONCLUSIONS ARE DRAWN UPON ENERGY CRITERION. THE EFFECT OF PGA VARIATION AND HEIGHT OF THE FRAMES ARE ALSO CONSIDERED IN THE STUDY .FINALLY, USING THE ABOVE MENTIONED RESULTS, A PROPER SOLUTION IS PRESENTED FOR TYPICAL SYSTEMS IN ORDER TO INCREASE THE ENERGY DAMPING ABILITY AND REDUCE THE DESTRUCTIVE EFFECTS IN STRUCTURES ON AN EARTHQUAKE EVENT, SO THAT A GREAT AMOUNT OF INDUCED ENERGY IS DAMPED AND DESTRUCTION OF THE STRUCTURE IS PREVENTED AS MUCH AS POSSIBLE.
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