Prediction of Residual Axial Load Carrying Capacity of Reinforced Concrete (RC) Columns Subjected to Extreme Dynamic Loads

AbstractDeficient or deteriorating reinforced-concrete columns in many existing structures have to be strengthened using economical, efficient, and fast methods. In the present study, different strengthening techniques to improve the load-carrying capacity of reinforced concrete (RC) columns have been compared. Five groups of fifteen square reinforced concrete columns (150 mm × 150 mm × 600 mm) and one group of three circular columns ( φ 170 mm) that have cross-sectional areas equivalent to those of the square columns were cast from normal-strength concrete. The test program was designed to examine the behavior of columns strengthened by carbon fiber-reinforced polymer (CFRP), steel jacketing, ferro cement, steel fibers, and silica fumes under cyclic axial compression. The efficiency of each strengthening method in increasing the column’s axial capacity, energy absorption, and ductility was studied using the experimental data. The test results showed that strengthening the columns could significantly enhance their load-carrying capacity and failure strains.

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Experimental Study on the Residual Axial Load-Carrying Capacity of Shear-Damaged RC Columns

Journal of Advanced Concrete Technology ◽

10.3151/jact.16.97 ◽

2018 ◽

Vol 16 (2) ◽

pp. 97-109 ◽

Cited By ~ 1

Author(s):

Yong Yang ◽

Kazuto Matsukawa ◽

Ho Choi ◽

Yoshiaki Nakano

Keyword(s):

Experimental Study ◽

Carrying Capacity ◽

Axial Load ◽

Load Carrying Capacity ◽

Rc Columns ◽

Load Carrying

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Experimental study on the behavior of eccentrically compressed reinforced concrete columns strengthened with CFRP composite sheets

Journal of Science and Technology in Civil Engineering (STCE) - NUCE ◽

10.31814/stce.huce(nuce)2021-15(4)-15 ◽

2021 ◽

Vol 15 (4) ◽

pp. 172-181

Author(s):

Trung Hieu Nguyen ◽

Xuan Dat Pham ◽

Khuong Duy Tran

Keyword(s):

Experimental Study ◽

Reinforced Concrete ◽

Carrying Capacity ◽

Column Height ◽

Strengthening Effect ◽

Load Carrying Capacity ◽

Rc Columns ◽

Cfrp Sheets ◽

Rc Column ◽

Load Carrying

Strengthening of reinforced concrete (RC) columns is needed when the actual load-carrying capacity of the columns does not reach the required level due to either structural deterioration or increasing acting loads. This experimental study aims to evaluate the strengthening effect on the eccentrically-compressed RC columns using Carbon fiber reinforced polymer (CFRP) sheets, that confine around the column cross-section. Three RC column specimens with the same geometrical dimensions, reinforcement detailing, and concrete compressive strength were cast and tested in the current experimental investigation. One RC column without being strengthened is referred as the control specimen whereas two other RC columns were partially strengthened by CFRP sheets. All three RC columns were axially loaded with the same initial eccentricity e0 of 80 mm. Based on the test results such as the ultimate load-carrying capacity, the load-rotation relationship, and load-curvature at the middle of column height, the effectiveness of the strengthening technique is discussed.

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