Behaviour of Slender Reinforced Concrete Columns Subjected to Bending and Axial Load PDF Download
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Author: R.S. Ghosh
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Languages : en
Pages :
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Author: R.S. Ghosh
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Category :
Languages : en
Pages :
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Author: A. Farah
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Languages : en
Pages :
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Author: Wen Hu Tsao
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Category : Axial loads
Languages : en
Pages : 358
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A numerical analysis was developed to evaluate the complete load-deflection and moment-curvature relationships for square and L-shaped slender reinforced concrete columns subjected to biaxial bending and axial load. This computer model can be used for any cross section geometry and material properties of normal concrete. The analysis was based on a deformation control and both the ascending and descending branches of curves can be studied. The finite difference method was introduced to calculate the deflections which satisfy the compatibility equations. Six square slender columns and eight L-shaped slender columns were tested to compare their experimental load-deformation results with the analytical results derived from the theoretical studies. A satisfactory agreement was achieved for the present study. The results of present study can be used for future design reference.
Author: Robert George Drysdale
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Category : Columns, Concrete
Languages : en
Pages : 450
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Author: Saranath Laksman Weerakoon
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Category :
Languages : en
Pages : 428
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Author: Robert George Drysdale
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Category : Columns, Concrete
Languages : en
Pages : 450
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Author: Byong Youl Bahn
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Category : Axial loads
Languages : en
Pages : 302
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A rational analysis of reinforced concrete (R/C) structures requires satisfactory modeling of the behavior of concrete under general loading patterns. The behavioral characteristics of concrete dominantly depends upon its load history. For the study of concrete behavior, parametric study and experimental investigation into the behavior of concrete under load history of random cycles are performed. Through parametric study, the applicability of the previous concrete models is examined and a physically motivated modeling for the cyclic stress-strain relationships is proposed. The present modeling of concrete under general cyclic loading is initiated to provide substantial applicability, flexibility of mathematical expressions and furthermore to describe the behavior of random cycles. For the experimental study of concrete subjected to cyclic axial compressions, tests of 3 in. by 6 in. concrete cylinders are conducted under four different loading regimes to determine the major experimental parameters for the proposed analytical expressions. The model developed is based on the results of parametric study and experimental data obtained for the present study. The validity of the proposed general cyclic model is confirmed through a comparison of the experimental results and simulated behavior of the model. Furthermore, the analytical model proposed has been idealized and incorporated into the procedures in analyzing RIC columns. The behavior of R/C columns having various properties and subjected to a variety of loading conditions have been the topics of considerable investigation. Of particular significance in the area of unexplored problems is the behavior of R/C columns under cyclic compressive load. It should be noted that cyclic loads with bidirectional eccentricities considered are in the longitudinal direction, and not in the transverse direction, with respect to the column axis. For the experimental investigation, tests of four foot long columns are conducted under stroke control to achieve both ascending and descending branches of the load-deformation curves. Analysis of RC columns subjected to cyclic axial compressions with bidirectional eccentricities should be approached from the standpoint of a three dimensional problem. A numerical procedure based on extended finite segment method is proposed here to predict the ultimate load, deflections and moment-curvature of experimental results. It is found that the proposed numerical analysis can reasonably simulate the loading and unloading behavior of R/C columns under combined biaxial bending moments and axial compressions.
Author: Arthur James Rensaa
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ISBN:
Category : Columns, Concrete
Languages : en
Pages : 254
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Author: Natalie Anne Lloyd
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ISBN:
Category :
Languages : en
Pages : 398
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Due to significant economic and structural advantages associated with the use of high strength concrete in compression members, the application of high strength concrete in columns and core walls is increasing. The advantages of using high strength concrete are well documented. Utilisation of high strength concrete leads to a reduction in column size. However, this results in an increase in slenderness of columns which would otherwise be stocky when built using low strength concrete. In addition, columns are rarely designed for pure axial load yet most research to date has focussed on high strength colurnns subject to concentric compression. Very limited data is available on columns subject to eccentric compression. The present research therefore focussed on slender columns subject to eccentric compression.
Author: Antoun Romanos Nader
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ISBN:
Category : Columns, Concrete
Languages : en
Pages : 212
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The investigation deals with the effect of eccentric loading on the moment-curvature relationship of reinforced concrete tee columns. The test program consisted of two series of tee-shaped reinforced concrete columns, loaded biaxially at constant angle from the principle axes. Their end conditions were assumed to be pinned-ended. Loads, at constant rate, were gradually applied until failure. At each loading stage, measurements were made for the strains and deflections at the mid span section. The experimental and theoretical results of the load- deformation and moment-curvature were compared and found that the analytical approach proposed by Hsu is applicable to irregular sections such as tee columns, under small and large eccentricities, but tended to underestimate slightly the axial load and the moment-curvatures at failure.
