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Modified fish-bone model: A simplified MDOF model for simulation of seismic responses of moment resisting frames

Khaloo, A. R ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.soildyn.2013.09.013
  3. Publisher: 2013
  4. Abstract:
  5. This paper presents a simplified Multi-Degree-Of-Freedom (MDOF) model through modification of fish-bone model (or generic frame). Modified Fish-Bone (MFB) model is developed through three enhancements: (i) the moment of inertia for half-beams is reduced slightly to modify the assumption of equal rotation at each story joints, (ii) a number of truss elements are inserted to the fish-bone model to simulate flexural deformation of moment frames due to axial elongation and contraction of columns, and (iii) moment-rotation relationship of representative rotational springs is supposed to be bilinear instead of trilinear in order to consider simultaneous yielding at both ends of the beam in moment frames. The proposed model is evaluated with respect to nonlinear dynamic analysis results of three classic moment resisting frames subjected to 94 records of FEMA-440 ground motion data set. Moreover, the adequacy of this model is compared with the fish-bone model and two predictors of nonlinear seismic demand. The statistical study of predicted interstory drift demonstrates the superiority of the proposed model over the fish-bone model and both seismic demand predictors
  6. Keywords:
  7. Equivalent MDOF model ; Fish-bone model ; Interstory drift angle ; Moment resisting frame ; Near-field earthquake ground motions ; Nonlinear dynamic analysis ; Seismic demand predictors ; Seismic drift demands ; Simplified MDOF model ; Inelastic seismic analysis ; Interstory drifts ; Moment resisting frames ; Near-field earthquakes ; Seismic demands ; Seismic drift ; Bone ; Concrete beams and girders ; Dynamics ; Fish ; Seismic design ; Seismology ; Steel beams and girders ; Structural frames ; Computer simulation ; Dynamic analysis ; Earthquake engineering ; Finite element method ; Flexure ; Ground motion ; Numerical model ; Seismic moment ; Seismic response ; Structural component
  8. Source: Soil Dynamics and Earthquake Engineering ; Volume 55, Pages 195-210 , 2013 ; 02677261 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0267726113001991