Seisimc Performance of Dutile End Diaphragms For Slab-on-girder Steel Bridges

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Mareki, Hasan | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44691 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Mofid, Massoud
Abstract:
This thesis illustrates the typical seismic retrofitting of bridges using a model governing transverse seismic response of retrofitted bridges by simplified analytical models of the end diaphragms based on the fundamental dynamic concept as well as previous research works. For three types of ductile diaphragm devices such as Eccentrically Braced Frames (EBF), Triangular-plate Added Damping and Stiffness Devices (TADAS) and Chevron Knee Bracing (CKB)and Shear Panel System(SPS), finite element nonlinear analytical models are developed in separate flexural and shear yielding modes, and the capability of the proposed finite element models is ascertained.The IDA (Incremental Dynamic Analyses) are also served and the fragility curves of the proposed systems with different geometry and specifications are compared. The results are finally utilized to verify the capability of the new proposed systems for the retrofitting design purpose
Keywords:
Chevron Knee Brace ; Bridges Diaphragms ; Triangular Added Damping and Stiffners ; Eccentrically Braced Frame (EBF) ; Moment Yielding ; Incremental Dynamic Analysis ; Nonlinear Static Analysis ; Fracture Curve

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