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    Axial Load Capacity of Concrete-Filled FRP Tube Columns: Experimental versus Theoretical Predictions

    Source: Journal of Composites for Construction:;2010:;Volume ( 014 ):;issue: 002
    Author:
    Hamdy M. Mohamed
    ,
    Radhouane Masmoudi
    DOI: 10.1061/(ASCE)CC.1943-5614.0000066
    Publisher: American Society of Civil Engineers
    Abstract: This paper presents the experimental and theoretical results of small and medium-scale concrete-filled fiber-reinforced polymer (FRP) tube (CFFT) columns. A total of 23 CFFT specimens were tested under axial compression load. Five different types of new FRP tubes were used as stay-in-place formwork for the columns. The effects of the following parameters were examined: the FRP-confinement ratio, the unconfined concrete compressive strength, the presence of longitudinal steel reinforcement, and the height-to-diameter ratio. Comparisons between the experimental test results and the theoretical prediction values by the three North American codes and design guidelines (ACI 440.2R-08, CSA-S6-06, and CSA-S806-02) are performed in terms of confined concrete strength and ultimate load carrying capacity. The results of this investigation indicate that the design equations of the ACI 440.2R-08, CAN/CSA-S6-06, and CAN/CSA-S806-02 overestimate the factored axial load capacity of the short CFFT columns as compared to the yield and crack load levels. Also, the CAN/CSA-S6-06 and CAN/CSA-S806-02 confinement models showed conservative predictions, while the ACI 440.2R-08 was slightly less conservative. A new confinement model is proposed for the confined concrete compressive strength of the CFFT cylinders. Also, the design equations are modified to accurately predict the ultimate and yield load capacities of internally reinforced and unreinforced short CFFT columns. Two new factors are introduced in the modified equations,
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      Axial Load Capacity of Concrete-Filled FRP Tube Columns: Experimental versus Theoretical Predictions

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    contributor authorHamdy M. Mohamed
    contributor authorRadhouane Masmoudi
    date accessioned2017-05-08T21:36:06Z
    date available2017-05-08T21:36:06Z
    date copyrightApril 2010
    date issued2010
    identifier other%28asce%29cc%2E1943-5614%2E0000069.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/57182
    description abstractThis paper presents the experimental and theoretical results of small and medium-scale concrete-filled fiber-reinforced polymer (FRP) tube (CFFT) columns. A total of 23 CFFT specimens were tested under axial compression load. Five different types of new FRP tubes were used as stay-in-place formwork for the columns. The effects of the following parameters were examined: the FRP-confinement ratio, the unconfined concrete compressive strength, the presence of longitudinal steel reinforcement, and the height-to-diameter ratio. Comparisons between the experimental test results and the theoretical prediction values by the three North American codes and design guidelines (ACI 440.2R-08, CSA-S6-06, and CSA-S806-02) are performed in terms of confined concrete strength and ultimate load carrying capacity. The results of this investigation indicate that the design equations of the ACI 440.2R-08, CAN/CSA-S6-06, and CAN/CSA-S806-02 overestimate the factored axial load capacity of the short CFFT columns as compared to the yield and crack load levels. Also, the CAN/CSA-S6-06 and CAN/CSA-S806-02 confinement models showed conservative predictions, while the ACI 440.2R-08 was slightly less conservative. A new confinement model is proposed for the confined concrete compressive strength of the CFFT cylinders. Also, the design equations are modified to accurately predict the ultimate and yield load capacities of internally reinforced and unreinforced short CFFT columns. Two new factors are introduced in the modified equations,
    publisherAmerican Society of Civil Engineers
    titleAxial Load Capacity of Concrete-Filled FRP Tube Columns: Experimental versus Theoretical Predictions
    typeJournal Paper
    journal volume14
    journal issue2
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0000066
    treeJournal of Composites for Construction:;2010:;Volume ( 014 ):;issue: 002
    contenttypeFulltext
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