期刊
JOURNAL OF COMPOSITES FOR CONSTRUCTION
卷 13, 期 1, 页码 13-24出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)1090-0268(2009)13:1(13)
关键词
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资金
- UAE University [02-01-7-11/06]
This paper presents the results of experimental program and analytical modeling for performance evaluation of a fiber-reinforced polymer (FRP) wrapping system to upgrade eccentrically loaded reinforced concrete (RC) columns. A total of 12 RC columns with end corbels were tested. The test specimen had an overall length of 1,200 mm. Each end corbel had a cross section of 250x250 mm and a length of 350 mm. The specimen in the test region was 125x125 mm having a longitudinal steel ratio of 1.9%. Test parameters included confinement condition (no wrapping, full FRP wrapping, and partial FRP wrapping), and eccentricity-to-section height (e/h) ratio (0.3, 0.43, 0.57, and 0.86). Research findings indicated that the strength gain caused by FRP wrapping decreased as e/h was increased. Full FRP wrapping resulted in about 37% enhancement in compression strength at a nominal e/h of 0.3, whereas only 3% strength gain was recorded at a nominal e/h of 0.86. The compression strengths of the partially wrapped columns were on average 5% lower than those of the fully wrapped columns. A nonlinear, second-order analysis that accounts for the change in eccentricity caused by the lateral deformation was proposed to predict the columns strength. A comparison between analytical and experimental results of the present study in addition to data published in the literature demonstrated the accuracy and validity of the proposed analysis.
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