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Strengthening design limitations of an RC frames using FRP column wrapping considering column-to-beam strength ratio

Khaloo, A. R ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. Publisher: Sharif University of Technology , 2007
  3. Abstract:
  4. The aim of this paper is to study the influence of the column-to-beam strength ratio on the seismic strengthening of a column with a Fiber-Reinforced Plastic (FRP) wrapping system. FRP wrapped Reinforced Concrete (RC) columns are analyzed to obtain moment-curvature curves using FRP confined concrete characteristics. A pushover analysis of a 2D model was performed on one and three-story moment-resisting frames, with different column-to-beam strength ratios. The results indicate that FRP strengthening is more efficient in frames with a low ratio of column-to-beam strength, due to the type of lateral failure mechanism of the frame. Also, high values of the column-to-beam strength ratio can be benefited by low values of the confining pressure. In case of a column strength greater than a beam strength, beyond a certain confining pressure ratio, further enhancement in performance will not be achieved. Therefore, the level of effective wrapping on frame performance enhancement is controlled by the column-to-beam strength ratio. © Sharif University of Technology
  5. Keywords:
  6. Column-to-beam strength ratios ; Moment-curvature curves ; Pushover analysis ; Seismic strengthening ; Structural frames ; Columns (structural) ; Failure analysis ; Fiber reinforced plastics ; Mathematical models ; Structural design ; Column ; Concrete structure ; Numerical model ; Reinforced concrete ; Seismic design ; Strength
  7. Source: Scientia Iranica ; Volume 14, Issue 5 , 2007 , Pages 405-413 ; 10263098 (ISSN)
  8. URL: http://scientiairanica.sharif.edu/article_2875.html