SEISMIC PERFORMANCE OF CONCENTRICALLY BRACED FRAME WITH ZIPPER COLUMN IN THE NEAR FAULT REGION

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AZIZI MAHDI

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Seminar Paper

Paper Information

Seminar: NATIONAL CONFERENCE ON EARTHQUAKE
Year:2015 | Issue:2

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Title

SEISMIC PERFORMANCE OF CONCENTRICALLY BRACED FRAME WITH ZIPPER COLUMN IN THE NEAR FAULT REGION

Author(s)

AZIZI MAHDI

Keywords

CONCENTRICALLY BRACED FRAMES

CHEVRON- BRACED FRAMES

ZIPPER COLUMNS

NEAR- FAULT REGION AND SEISMIC DESIGN

Abstract

STEEL BRACED FRAME IS ONE OF THE STRUCTURAL SYSTEMS USED TO RESIST EARTHQUAKE LOADS IN BUILDINGS. THE UNEXPECTED FAILURE OF STEEL STRUCTURES DURING PAST STRONG SEISMIC EXCITATION LED TO FULL FILL ADEQUATE STRENGTH FOR MODERN STRUCTURES IN SEISMIC AREAS. MANY EXISTING STEEL STRUCTURES WITH THIS SYSTEM NEED RETROFITTING TO OVERCOME DEFICIENCIES AND TO RESIST SEISMIC LOADS. IN THE PRESENT STUDY, THE SEISMIC BEHAVIOR OF CONCENTRICALLY BRACED FRAME (CBF) STRUCTURES WAS INVESTIGATED AND THE "ZIPPER COLUMN" IDEA FOR RETROFITTING WAS PROPOSED. TWO TYPES OF STRUCTURES, INCLUDING CBF AND CBF WITH ZIPPER COLUMNS FOR 5, 12 AND 20 STORIES WERE DESIGNED PER THE IRANIAN SEISMIC CODE, THE IRANIAN STEEL STRUCTURES DESIGN CODE AND THE SEISMIC PROVISIONS. DYNAMIC ANALYSIS USING 4 EARTHQUAKE RECORDS WERE CARRIED OUT TO OBTAIN DYNAMIC RESPONSES. ACCORDING TO THE ANALYSIS RESULTS, THE MAXIMUM DISPLACEMENT, BASE SHEAR AND THE INTER- STORY DRIFT RATIO IN CBF SYSTEMS ARE DECREASED AS ZIPPER COLUMNS ARE UTILIZED. ALSO THE FRAMES SHOWED GOOD DISSIPATING- ENERGY CAPACITY AND LARGE DEFORMATION DUCTILITY WITHOUT SIGNIFICANT STRENGTH LOSSES. MOREOVER THE SEISMIC BEHAVIOR OF CBF SYSTEM IS IMPROVED.

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APA: Copy

AZIZI, MAHDI. (2015). SEISMIC PERFORMANCE OF CONCENTRICALLY BRACED FRAME WITH ZIPPER COLUMN IN THE NEAR FAULT REGION. NATIONAL CONFERENCE ON EARTHQUAKE. SID. https://sid.ir/paper/928144/en

Vancouver: Copy

AZIZI MAHDI. SEISMIC PERFORMANCE OF CONCENTRICALLY BRACED FRAME WITH ZIPPER COLUMN IN THE NEAR FAULT REGION. 2015. Available from: https://sid.ir/paper/928144/en

IEEE: Copy

MAHDI AZIZI, “SEISMIC PERFORMANCE OF CONCENTRICALLY BRACED FRAME WITH ZIPPER COLUMN IN THE NEAR FAULT REGION,” presented at the NATIONAL CONFERENCE ON EARTHQUAKE. 2015, [Online]. Available: https://sid.ir/paper/928144/en

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