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Paper Information

Journal:   SCIENTIA IRANICA   SEPTEMBER-OCTOBER 2007 , Volume 14 , Number 5; Page(s) 405 To 413.
 
Paper: 

STRENGTHENING DESIGN LIMITATIONS OF AN RC FRAMES USING FRP COLUMN WRAPPING CONSIDERING COLUMN-TO-BEAM STRENGTH RATIO

 
 
Author(s):  KHALOU A.R.*, ESMAEELI A.
 
* DEPARTMENT OF CIVIL ENGINEERING, SHARIF UNIVERSITY OF TECHNOLOGY, TEHRAN, I.R. IRAN
 
Abstract: 
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 column strength greater than 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.
 
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