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Optimum seismic design of concentrically braced steel frames: Concepts and design procedures

Moghaddam, H ; Sharif University of Technology | 2005

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jcsr.2004.08.002
  3. Publisher: Elsevier BV , 2005
  4. Abstract:
  5. A methodology is presented for optimization of the dynamic response of concentrically braced steel frames subjected to seismic excitation, based on the concept of uniform distribution of deformation. In order to obtain the optimum distribution of structural properties, an iterative optimization procedure has been adopted. In this approach, the structural properties are modified so that inefficient material is gradually shifted from strong to weak areas of a structure. This process is continued until a state of uniform deformation is achieved. It is shown that the seismic performance of such a structure is optimal, and behaves generally better than those designed by conventional methods. In order to avoid onerous analysis of the frame models, an equivalent procedure is introduced for performing the optimization procedure on the modified reduced shear-building model of the frames, which is shown to be accurate enough for design purposes. © 2004 Elsevier Ltd. All rights reserved
  6. Keywords:
  7. Deformation ; Earthquakes ; Optimization ; Product design ; Seismic prospecting ; Steel ; Stiffness ; Strength of materials ; Braced frames ; Optimal strength pattern ; Performance-based design ; Seismic design ; Seismic loading ; Structural frames
  8. Source: Journal of Constructional Steel Research ; Volume 61, Issue 2 , 2005 , Pages 151-166 ; 0143974X (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0143974X04001142