Preloaded RC columns strengthened with high-strength concrete jackets under uniaxial compression

Takeuti, Adilson Roberto; Hanai, João Bento de; Mirmiran, Amir

doi:10.1617/s11527-007-9323-0

Cited by 56 publications

(29 citation statements)

References 2 publications

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“…Ersoy et al (1993) showed the effectiveness of concrete jacketing applied on both repaired and undamaged specimens under axial pre-loading and sustained loading as well as under monotonic and reversed cyclic lateral loading. More recently Takeuti et al (2008) demonstrated that the axial preloading of did not adversely affect the capacity of concrete jacketed circular and square columns. Rodriguez and Park (1994) and Bett et al (1988) also confirmed the efficiency of use of concrete jacketing in improving the strength, stiffness and deformation capacity of jacketed columns under axial and lateral loads.…”

Section: Column Retrofit Methodsmentioning

confidence: 99%

Effectiveness of Repair and Strengthening Methods for Reinforced Concrete Columns and Beam-Column Joints

Sezen

2012

Structures Congress 2012

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Currently, there are only a few common methods that can be used to strengthen reinforced concrete columns. These methods, including steel jacketing, section enlargement by concrete jacketing, and fiber reinforced polymer (FRP) composite wraps, were are used to strengthen 15 column specimens. The ease of application, economy and efficiency of each method are discussed and compared. In this study, three exterior reinforced concrete beam-column joint specimens were tested under reverse cyclic loading. The damaged specimens were repaired by replacing the damaged concrete and then strengthened using FRP strips. The strength was restored and deformation capacities of the strengthened specimens were much larger than those of the original specimens.

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Section: Column Retrofit Methodsmentioning

confidence: 99%

Effectiveness of Repair and Strengthening Methods for Reinforced Concrete Columns and Beam-Column Joints

Sezen

2012

Structures Congress 2012

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“…Based on Takeuti, the equilibrium equation of axial forces, in case of directly loaded RC jackets, where the possibility of premature stability failure can be neglected, is expressed as:

N_{R, italicstr} = A_{c, italiccol} \times f_{cc}^{col} + normalΣ A_{s} \times f_{y} + A_{c, italicjack, italiceff} \times f_{c}^{jack} .

…”

Section: Proposed Approachmentioning

confidence: 99%

“…Experimental data are available for thin RC (and typically ferrocement) jackets only; therefore, the verification of calculation results for two fixed‐end models (Figure c) is not yet possible. For comparison, the published tests are used …”

Section: Accuracy Of the Proposed Modelmentioning

confidence: 99%

Deformation‐based method for the analysis of reinforced concrete‐ and fiber reinforced polymer‐jacketed columns subjected to axial compression

Várdai

2017

Structural Concrete

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This paper introduces a generalized approach for the sectional analysis of jacketing, based on the compatibility of lateral deformation of a jacketed column and jacket wall. The method is suitable to determine the magnitude and distribution of confining stresses provided by reinforced concrete or fiber reinforced polymer jackets at any stress level, and to estimate the ultimate resistance of strengthened columns subjected to axial compression. After the discussion of the theoretical bases of the proposed method, a simplified application is introduced. For validation of applicability and accuracy to predict ultimate capacity, comparison with a large number of experimental results with square‐ and circular‐shaped columns is presented. According to the comparisons, the average of the absolute values of relative errors of the proposed method is 8.34%. The calculation results are evaluated qualitatively as well to highlight relevant issues for jacket detailing and to point out possible future directions of developing adequate design methods.

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“…Ersoy, Suleiman, and Tankut (1993), Takeuti, de Hanai, and Mirmiran (2008) and Giménez, Adam, Ivorra, Moragues et al (2009) found that stress-lagging effects could significantly decrease the ultimate axial load capacity of the strengthened columns. To address this stress-lagging problem, Su, Cheng, Wang, Siu, and Zhu (2011) and Su and Wang (2012) proposed a column decompression approach to strengthen preloaded RC columns under axial compression loading.…”

Section: Introductionmentioning

confidence: 99%

Flexural and axial strengthening of preloaded concrete columns under large eccentric loads by flat and precambered steel plates

Wang

2014

Structure and Infrastructure Engineering

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In this study, the behaviour of the preloaded reinforced concrete columns under large eccentric compression loading and strengthened with flat and precambered steel plates was investigated. An original analytical model considering the effects of stress-lagging induced by eccentric pre-compressed loading was developed to predict the ultimate load capacity of platestrengthened columns. Then, 10 specimens with different eccentricities, plate thicknesses and initial precamber displacements were tested. The strength, deformability, ductility and moment-curvature response of the strengthened columns were examined, and the effectiveness of this approach was validated. The good agreement between the analytical and experimental results demonstrates that the proposed analytical model can accurately predict the load-carrying capacity of the plate-strengthened columns under large eccentric compression loading.

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Preloaded RC columns strengthened with high-strength concrete jackets under uniaxial compression

Cited by 56 publications

References 2 publications

Effectiveness of Repair and Strengthening Methods for Reinforced Concrete Columns and Beam-Column Joints

Effectiveness of Repair and Strengthening Methods for Reinforced Concrete Columns and Beam-Column Joints

Deformation‐based method for the analysis of reinforced concrete‐ and fiber reinforced polymer‐jacketed columns subjected to axial compression

Flexural and axial strengthening of preloaded concrete columns under large eccentric loads by flat and precambered steel plates

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