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Behavior Of Concrete And Slender Reinforced Concrete Columns Under Cyclic Axial Compression With Bidirectional Eccentricities
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Book Synopsis Behavior of Concrete and Slender Reinforced Concrete Columns Under Cyclic Axial Compression with Bidirectional Eccentricities by : Byong Youl Bahn
Download or read book Behavior of Concrete and Slender Reinforced Concrete Columns Under Cyclic Axial Compression with Bidirectional Eccentricities written by Byong Youl Bahn and published by . This book was released on 1993 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Normal-strength and High-strength Concrete Columns Under Cyclic Axial Load and Biaxial Moment by : Mehdi Zarei
Download or read book Normal-strength and High-strength Concrete Columns Under Cyclic Axial Load and Biaxial Moment written by Mehdi Zarei and published by . This book was released on 2016 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: The technique of using Carbon Fiber Reinforced Polymer (CFRP) materials to repair and strengthen various concrete members has become popular in the structural retrofitting field as an effective way to enhance the strength and ductility of concrete members due to its superior mechanical properties. In this study a method was introduced to study the behavior of concrete columns with and without CFRP jackets under constant axial load and variable lateral load. The lateral load was applied monotonically and cyclically. To predict the behavior of concrete columns under monotonic and cyclic compressive loadings, a computer code was developed to produce the moment-curvature diagram for concrete sections. The moment-curvature diagram was then input in SAP2000 to study the behavior of reinforced concrete columns. The result of this analysis was found to correlate with experimental data well. The behavior of high-strength concrete (HSC) columns having various properties and subjected to a variety of loading conditions has been the topic of considerable investigation. Of particular significance in this area is the behavior of HSC columns under cyclic compressive load with bidirectional eccentricity. For the experimental investigation, tests of six square slender HSC columns were conducted under stroke control to achieve both ascending and descending branches of the load-deformation curves. Analysis of HSC columns subjected to cyclic axial compression with bidirectional eccentricity was approached from the standpoint of a three-dimensional problem. A computer program based on the extended finite segment method and accounting for geometrical nonlinearity has been proposed here to predict the load-deflection curves of HSC columns under cyclical loading. The HSC stress-strain relationship obtained by parametric study and experimental investigation into the behavior of concrete under cyclical load history has been incorporated into the numerical procedure. The presented computer analysis results have been compared with the experimental data, and a satisfactory agreement was attained for both the ascending and descending branches of the load-deformation curves.
Book Synopsis Flexural Behavior of Reinforced Concrete Columns with Five-spiral Reinforcement Under Cyclic and Eccentric Axial Loading by : 留明誠
Download or read book Flexural Behavior of Reinforced Concrete Columns with Five-spiral Reinforcement Under Cyclic and Eccentric Axial Loading written by 留明誠 and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Slender High Strength Steel Fiber Reinforced Concrete Columns Under Combined Biaxial Bending and Axial Compression by : Tzuoh-Jaw Wu
Download or read book Behavior of Slender High Strength Steel Fiber Reinforced Concrete Columns Under Combined Biaxial Bending and Axial Compression written by Tzuoh-Jaw Wu and published by . This book was released on 1990 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of reinforced concrete columns subjected to cyclic axial and lateral load reversals by : Leo Edward Linbeck
Download or read book Behavior of reinforced concrete columns subjected to cyclic axial and lateral load reversals written by Leo Edward Linbeck and published by . This book was released on 1987 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behaviour of Slender Reinforced Concrete Columns Under Biaxially Eccentric Loading by : Sadek Iskander Abdel-Sayed
Download or read book Behaviour of Slender Reinforced Concrete Columns Under Biaxially Eccentric Loading written by Sadek Iskander Abdel-Sayed and published by . This book was released on 1975 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Square and L-shaped Slender Reinforced Concrete Columns Under Combined Biaxial Bending and Axial Compression by : Wen Hu Tsao
Download or read book Behavior of Square and L-shaped Slender Reinforced Concrete Columns Under Combined Biaxial Bending and Axial Compression written by Wen Hu Tsao and published by . This book was released on 1992 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Behavior of High Strength Concrete Columns Under Axial Load and Cyclic Flexure by : Dharmendra Vallabhbhai Shah
Download or read book Behavior of High Strength Concrete Columns Under Axial Load and Cyclic Flexure written by Dharmendra Vallabhbhai Shah and published by . This book was released on 1991 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strength of High Strength Concrete Columns Under Eccentric Compression by : R. H. Basappa Setty
Download or read book Strength of High Strength Concrete Columns Under Eccentric Compression written by R. H. Basappa Setty and published by . This book was released on 1995 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research work involved a study of behaviour and strength of eccentrically loaded High Strength Concrete columns. The research comprised experimental and analytical components. With regard to experimental work, twelve columns were manufactured and tested to failure. All columns were rectangular in cross-section with 300 mm x 100 mm as dimensions. The test specimens were loaded about the minor axis. The ratio of longitudinal reinforcement was either 1.47% (4 - 12 mm diameter bars) or 2.2% (6 - 12 mm diameter bars). The lateral reinforcement was in the form of rectangular closed ties made of 6 mm wires (W6). The spacing of ties was generally 50 mm, but, was decreased to 30 mm, at either ends to avoid premature failure.
Book Synopsis Behaviour of Slender Reinforced Concrete Columns Subjected to Bending and Axial Load by : R.S. Ghosh
Download or read book Behaviour of Slender Reinforced Concrete Columns Subjected to Bending and Axial Load written by R.S. Ghosh and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Non-Ductile Slender Reinforced Concrete Columns Retrofit by CFRP Under Cyclic Loading by :
Download or read book Behavior of Non-Ductile Slender Reinforced Concrete Columns Retrofit by CFRP Under Cyclic Loading written by and published by . This book was released on 2019 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Middle East region and many countries in the world, older reinforced concrete (RC) columns are deemed to be weak in seismic resistance because of their low amount of reinforcement, low grades of concrete, and large spacing between the transverse reinforcement. The capacity of older RC columns that are also slender is further reduced due to the secondary moments. Appropriate retrofit techniques can improve the capacity and behavior of concrete members. In this study, externally bonded Carbon Fiber Reinforced Polymer (CFRP) retrofit technique was implemented to improve the behavior of RC columns tested under constant axial load and cyclic lateral load. The study included physical testing of five half-scale slender RC columns, with shear span to depth ratio of 7. Three specimens represented columns in a 2-story, and two specimens represented columns in a 4-story building. All specimens had identical cross sections, reinforcement detail, and concrete strength. Two specimens were control, two specimens were retrofit with CFRP in the lateral direction, and one specimen retrofit in the longitudinal and lateral directions. A computer model was created to predict the lateral load-displacement relations. The experimental results show improvement in the retrofit specimens in strength, ductility, and energy dissipation. The effect of retrofitting technique applied to two full-scale prototype RC buildings, a 2-story and a 4-story building located in two cities in Iraq, Baghdad, and Erbil, was determined using SAP2000.
Book Synopsis Hysteretic Behavior of Reinforced Concrete Columns Subjected to High Axial and Cyclic Shear Forces by : Stan W. Zagajeski
Download or read book Hysteretic Behavior of Reinforced Concrete Columns Subjected to High Axial and Cyclic Shear Forces written by Stan W. Zagajeski and published by . This book was released on 1978 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Reinforced Concrete Columns Under Cyclic Loading by : Kardiyono Tjokrodimuljo
Download or read book Behavior of Reinforced Concrete Columns Under Cyclic Loading written by Kardiyono Tjokrodimuljo and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reinforced Concrete Column Behavior Under Cyclic Loading by : 熊朝暉
Download or read book Reinforced Concrete Column Behavior Under Cyclic Loading written by 熊朝暉 and published by Open Dissertation Press. This book was released on 2017-01-28 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Reinforced Concrete Column Behavior Under Cyclic Loading" by 熊朝暉, Zhaohui, Xiong, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3124383 Subjects: Columns, Concrete Axial loads Reinforced concrete
Book Synopsis Slender Reinforced Concrete Columns Under Load and Moment by : David Schofield
Download or read book Slender Reinforced Concrete Columns Under Load and Moment written by David Schofield and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Slender reinforced concrete columns have become widely used as structural members in recent years. Current Codes of Practice for Structural Concrete lack sufficient guidance to designers for their safe and efficient design. This investigation studies the behaviour of very slender, pin-ended, reinforced concrete columns, under short-term and sustained loads, by experiment and theoretical analysis. A new approach is used in the method of applying load to the column. A concentric axial load and independant primary end moments are considered. This allows the determination of secondary moments due to axial force and secondary deflections to be easily determined compared with the conventional eccentric load methods adopted in the past. A non-linear, second-order computer analysis has been developed which is capable of accurately predicting the deflections of hinged columns throughout the loading range from zero load to buckling failure, for any combination of eccentric loads and primary moments for short or sustained periods. It has the potential to accept end restraint in order to model framed columns. An extensive experimental programme of tests has been performed on 48 column specimens with slenderness ratios between 29 and 59 under short term loads and 5 specimens under sustained loads for up to two years. A total of 68 short column specimens with an identical section to the slender columns and material specimens were also tested. The specimens had a mean wet-cured cube strength of 42 N/sq.mm. The results of these tests and, 120 similar results of other authors, confirmed the validity of the proposed theoretical analysis and the assumptions used. The computer program which is presented could be made available to design offices for use on a basic micro-computer. The design methods recommended by three Codes of Practice, CP110:1972, ACI318:1977 and CP114:1957, have been compared with the experimental and theoretical results of this work. CP110 and ACI318 are shown to give conservative designs, with an overall load factor of 3.0 and 2.4 respectively, for design loads compared with the 25 year load.
Book Synopsis Nonlinear Time Dependent Design and Analysis of Slender Reinforced Concrete Columns by : Ka-Wai Lee
Download or read book Nonlinear Time Dependent Design and Analysis of Slender Reinforced Concrete Columns written by Ka-Wai Lee and published by Cuvillier Verlag. This book was released on 2004 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Tee-shaped Reinforced Concrete Columns Subjected to Biaxial Bending and Axial Compression by : Antoun Romanos Nader
Download or read book Behavior of Tee-shaped Reinforced Concrete Columns Subjected to Biaxial Bending and Axial Compression written by Antoun Romanos Nader and published by . This book was released on 1984 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
