Log in

Relevant bibliographies by topics / Slender reinforced concrete columns / Journal articles

To see the other types of publications on this topic, follow the link: Slender reinforced concrete columns.

Journal articles on the topic 'Slender reinforced concrete columns'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Slender reinforced concrete columns.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Souza, Régis Marciano de, Ricardo Rodrigues Magalhães, and Ednilton Tavares de Andrade. "COMPARATIVE STUDY OF NON-LINEAR SIMULATIONS OF A REINFORCED CONCRETE SLENDER COLUMN USING FINITE ELEMENT METHOD AND P-DELTA." Theoretical and Applied Engineering 3, no. 1 (February 11, 2019): 1–11. http://dx.doi.org/10.31422/taae.v3i1.7.

Full text

Abstract:

This paper analyzes the non-linear geometric behavior of reinforced concrete slender columns. This approach is due to the fact that there is a tendency to reinforced concrete slender constructions, which may have significant second order effects. This research aimed at comparing different formulations for the analysis of non-linear behavior of reinforced concrete slender columns by comparing results from simulated problem (slender column with ten load scenarios) between the Finite Element Method (FEM) and the Iterative Process P-DELTA(P-Δ). Numeric results revealed that the Iterative Process P-Δ presented different results from FEM and that the second order effects are significant for reinforced concrete slender column problems.

APA, Harvard, Vancouver, ISO, and other styles

2

Muhammad, Bassman. "Behavior of reinforced concrete slender rectangular columns under uniaxial loading." MATEC Web of Conferences 162 (2018): 04022. http://dx.doi.org/10.1051/matecconf/201816204022.

Full text

Abstract:

Two proposed formulae are presented to obtain the reinforced concrete slender column capacity. Reinforced concrete slender columns are used more nowadays than in the past 30 years because of development of engineering materials. Structural engineers that adopted the ACI 318M Code know that the design of this type of columns is more tedious than short ones. This research proposes two formulae that reflect the ultimate strength of cross section of slender columns, one for the axial and the second for the bending moment. Case study of 656250 columns is generated to cover most variable properties of columns, analyzed using MATLAB (R2017a) Program to obtain the ultimate strength of cross section then compared to the strength of slender columns.

APA, Harvard, Vancouver, ISO, and other styles

3

Chiang, J. C. L., and Leong Wai Lim. "Behaviour and Strengthening Methods of Tall Slender Columns in Earthquake Conditions." Key Engineering Materials 879 (March 2021): 221–31. http://dx.doi.org/10.4028/www.scientific.net/kem.879.221.

Full text

Abstract:

Reinforced concrete buildings are normally designed and constructed with well-defined vertical column supports which are able to withstand both vertical and lateral loadings. In the case of high columns there is a risk of instability due to its slenderness caused by the higher apex ratio (measured by its height in relation to the width). This is compounded by having such buildings located at medium to high seismic risk zones, where lateral dynamic loadings can occur. This research paper focused on how such slender reinforced concrete columns will behave under earthquake loading conditions, and highlights some innovative ways to strengthen the column capacity to withstand both vertical and lateral loadings. Besides the conventional ways to provide diagonal or lateral bracings, the use of glass fibre reinforced polymer (GFRP) as an alternative material for retrofitting tall slender reinforced concrete columns are presented here. The new method includes spraying of the GFRP onto the external surfaces of the columns and also incorporate the GFRP bars as additional reinforcement into the concrete columns. Both methods proved to improve the durability and strengthen the tall reinforced concrete column. This study shows the ability of the new method of amelioration of the slender reinforced concrete columns to increase their stability during seismic activity.

APA, Harvard, Vancouver, ISO, and other styles

4

Shimazu, T., and Y. Fukuhara. "Stability of Reinforced Concrete Slender Columns." Concrete Journal 28, no. 10 (1990): 17–24. http://dx.doi.org/10.3151/coj1975.28.10_17.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Chuang, Poon-Hwei, and Sia-Keong Kong. "Strength of Slender Reinforced Concrete Columns." Journal of Structural Engineering 124, no. 9 (September 1998): 992–98. http://dx.doi.org/10.1061/(asce)0733-9445(1998)124:9(992).

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Han, Zhuo, Shao Fei Jiang, Zhi Ping Sun, and Le Zhou. "Experimental Investigation on Behavior of Slender Steel Reinforced Concrete Columns Subjected to Eccentric Load." Applied Mechanics and Materials 256-259 (December 2012): 697–701. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.697.

Full text

Abstract:

The objectives of this research were to investigate the structural behavior of slender steel reinforced concrete (Referred to as SRC)composite columns subjected to eccentric axial loading. The test consisted of 10 slender columns, with rectangular section160×180mm, and steel shape I10 encased in concrete. The stirrup spacing was 150 mm; its diameter was 6 mm. The diameter of longitudinal reinforcing bars was 10 mm. Details of the experimental investigations including description of the test columns, failure modes and mechanisms, strain characteristics, and load-deformation responses are discussed. Effects of concrete strength, slenderness of columns, and eccentricity of axial loads on the load-carrying capacity of slender column are then presented. Based on these results, a range of slenderness ratio and eccentric ratio of slender SRC column is proposed.

APA, Harvard, Vancouver, ISO, and other styles

7

HWEI, C. P., and K. S. KEONG. "FAILURE LOADS OF SLENDER REINFORCED CONCRETE COLUMNS." Proceedings of the Institution of Civil Engineers - Structures and Buildings 110, no. 4 (November 1995): 339–50. http://dx.doi.org/10.1680/istbu.1995.28052.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Bekdas, Gebrail, and Sinan Melih Nigdeli. "The Optimization of Slender Reinforced Concrete Columns." PAMM 14, no. 1 (December 2014): 183–84. http://dx.doi.org/10.1002/pamm.201410079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Tikka, Timo K., and S. Ali Mirza. "Effective flexural stiffness of slender structural concrete columns." Canadian Journal of Civil Engineering 35, no. 4 (April 2008): 384–99. http://dx.doi.org/10.1139/l07-113.

Full text

Abstract:

The CSA A23.3 standard permits the use of a moment-magnifier approach for the design of slender reinforced concrete and composite steel–concrete columns. This approach is strongly influenced by the effective flexural stiffness (EI), which varies due to the nonlinearity of the concrete stress–strain curve and the cracking along the column length, among other factors. The EI equations given in the CSA standard are approximate when compared with the EI values computed from the axial load – bending moment – curvature relationships. This study was conducted to determine the influence of a full range of variables on EI used for the design of slender reinforced concrete and composite steel–concrete columns, and also to examine the existing CSA EI equations. Over 27 000 isolated concrete columns, each with a different combination of specified variables, in symmetrical single-curvature bending were simulated to generate the stiffness data. Two new design equations to compute EI of structural concrete columns were then developed from the simulated stiffness data and are proposed as an alternative to the existing CSA design equations for EI.

APA, Harvard, Vancouver, ISO, and other styles

10

Zarringol, Mohammadreza, and Mohammadehsan Zarringol. "Evaluation of Reinforced Concrete Columns under Biaxial Bending." Journal of Sustainable Development 10, no. 2 (March 30, 2017): 228. http://dx.doi.org/10.5539/jsd.v10n2p228.

Full text

Abstract:

Modeling by finite element method provides a ground for better perception of the behavior of reinforce columns and it is also useful in prediction of the behavior of these members without the experimental results. The performance improvement depends upon different parameters including the geometry of columns and configuration of reinforcement layers. In this study, slender reinforced columns are modeled under axial and biaxial bending loading with Carbon fiberreinforced polymer (CFRP) with different slender ratios using Abaqus software. The model is validated by the results of Bilchek et al., experiments. In this design, 30 concrete unstrengthened hoop columns with the diameter 100mm and heights 200,400,600,800,1000mm are made and reinforced with bidirectional CFRP composites. In each slenderness, a control sample (unstrengthened) and 5 reinforced specimens with different fiber configurations (hoop, longitudinal, angel and their combination) are tested under axial loading and biaxial bending to the ultimate failure. The results showed that these composites increased strength and ductility of specimens considerably. The results showed that in unstrengthened specimens, by increasing slenderness from 1 to 10, strength and ductility were reduced as 35, 65%, respectively. The results showed that the modeling using experimental data had good consistency. Based on the shortage of experimental data in slender columns at big scale, by performing similar studies, the existing problems can be eliminated.

APA, Harvard, Vancouver, ISO, and other styles

11

Hamzaoui, L., and T. Bouzid. "The Proposition of an EI Equation of Square and L–Shaped Slender Reinforced Concrete Columns under Combined Loading." Engineering, Technology & Applied Science Research 11, no. 3 (June 1, 2021): 7100–7106. http://dx.doi.org/10.48084/etasr.4048.

Full text

Abstract:

The stability and strength of slender Reinforced Concrete (RC) columns depend directly on the flexural stiffness EI, which is a major parameter in strain calculations including those with bending and axial load. Due to the non-linearity of the stress-strain curve of concrete, the effective bending stiffness EI always remains variable. Numerical simulations were performed for square and L-shaped reinforced concrete sections of slender columns subjected to an eccentric axial force to estimate the variation of El resulting from the actual behavior of the column, based on the moment-curvature relationship. Seventy thousand (70000) hypothetical slender columns, each with a different combination of variables, were used to investigate the main variables that affect the EI of RC slender columns. Using linear regression analysis, a new simple and linear expression of EI was developed. Slenderness, axial load level, and concrete strength have been identified as the most important factors affecting effective stiffness. Finally, the comparison between the results of the new equation and the methods proposed by ACI-318 and Euro Code-2 was carried out in connection with the experimental results of the literature. A good agreement of the results was found.

APA, Harvard, Vancouver, ISO, and other styles

12

CHUANG, P. H., S. K. KONG, and A. N. BEAL. "FAILURE LOADS OF SLENDER REINFORCED CONCRETE COLUMNS. DISCUSSION." Proceedings of the Institution of Civil Engineers - Structures and Buildings 122, no. 3 (August 1997): 364–66. http://dx.doi.org/10.1680/istbu.1997.29815.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Ruiz, Sonia E., and J. Cipriano Aguilar. "Reliability of Short and Slender Reinforced‐Concrete Columns." Journal of Structural Engineering 120, no. 6 (June 1994): 1850–65. http://dx.doi.org/10.1061/(asce)0733-9445(1994)120:6(1850).

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Dobrý, Jakub, Vladimír Benko, Miroslav Kováčik, and Hannes Wolfger. "Experimental Verification of Slender Reinforced Concrete Columns Design." Solid State Phenomena 322 (August 9, 2021): 142–50. http://dx.doi.org/10.4028/www.scientific.net/ssp.322.142.

Full text

Abstract:

The columns have been part of the constructions since the beginning of the buildings and have retained their design and construction importance to the present. The advantage of using more slender elements are less material consumption and more usable space in the interiors. The continuous improvement of the building materials and the use of hybrid structural elements leads to the downsizing of the structural elements. The aim of this article is the nonlinear analysis of the slender rein-forced concrete columns and the loss of stability verified by the experimental tests. Nonlinear calculations can be considered as the most accurate calculation option for the load bearing structural elements. On the other hand, the effect of the “black box” has been, and will be the cause of a large number of building defects. In the Eurocode 2 in chapter 5.8.6 of the European Concrete Design Standard, there is a possibility of using the general nonlinear method in practice, even for the com-pressed elements. In the design of the slender structures, the influence of second-order theory is a very important part of the design. In this publication are described theoretical and experimental analyses of the slender columns, that failed due to loss of stability inside of their design interaction diagram - much sooner than the critical cross-sections reached its resistance. As a part of the experimental preparations, reinforced concrete columns were designed, based on numerous numerical analyses. Later, the chosen columns were tested in the laboratories of TU Wien in Vienna. Experimental verification is one of the main parts of my dissertation thesis.

APA, Harvard, Vancouver, ISO, and other styles

15

Kendický, Peter, Vladimír Benko, and Tomáš Gúcky. "Experimental Analysis of Slender Concrete Columns at the Loss of Stability." Solid State Phenomena 249 (April 2016): 203–8. http://dx.doi.org/10.4028/www.scientific.net/ssp.249.203.

Full text

Abstract:

The use of non-linear methods for design of slender concrete columns by European standards. For the verification of non-linear design methods it is important to compare their results with results of experiments. Within the applied research of the Faculty of Civil Engineering at Slovak University of Technology in Bratislava in cooperation with the company ZIPP Bratislava LTD the experimental verification of the slender reinforced concrete columns was realized. In the paper the authors present the preparation and process one of three series of slender reinforced concrete columns, which were made to verify the reliability of various design methods. Columns of planned second series were designed from high performance concrete C100/115, but the material tests showed that the strength class of concrete was C70/85. The columns, subjected to axial force and bending moment were designed to fail due to loss of stability before the resistance of the critical cross-section is reached. The expected compressive strain in concrete was 1,5 ‰.

APA, Harvard, Vancouver, ISO, and other styles

16

Guan, Ping, and Lan Xiang Chen. "Mechanical Behaviors of Slender Steel Tubular Columns Filled with Steel-Reinforced High-Strength Concrete." Advanced Materials Research 1089 (January 2015): 235–38. http://dx.doi.org/10.4028/www.scientific.net/amr.1089.235.

Full text

Abstract:

To study on the mechanical behaviors of the new slender steel-concrete composite columns that are named after steel tubular columns filled with steel-reinforced high-strength concrete(STSRHC), the mechanical models of slender STSRHC are established for the analysis with the finite element software ABAQUS. There are seven influencing factors on the mechanical behaviors of slender STSRHC, they are: slender ratio, eccentricity, the thickness of steel tube, the yield stress of steel tube, the yield stress of inserted steel, the cube strength of high-strength concrete, the shape of inserted steel cross section. The results show the results calculated by software have good agreements with the tested ones; slender ratio, eccentricity and the thickness are the most effective factors on the mechanical properties of slender STSRHC.

APA, Harvard, Vancouver, ISO, and other styles

17

Fillo, Ľudovít, Vladimír Benko, and Jakub Dobrý. "Reliability of Slender Reinforced Concrete Columns in Second Generation of Eurocodes." Solid State Phenomena 309 (August 2020): 228–33. http://dx.doi.org/10.4028/www.scientific.net/ssp.309.228.

Full text

Abstract:

Design of slender reinforced concrete columns based on currently valid series of codes has its blank spaces. Authors of this articles are systematically working on filling these blank spaces with theoretical and experimental verifications, with focus on upcoming series of Eurocodes. They are attending the meetings of work group TC250-SC2-WG1, which is preparing changes in the new series. In this article we are presenting our suggested changes based on calculations and series of slender reinforced concrete columns experiments.

APA, Harvard, Vancouver, ISO, and other styles

18

Hong, H. P. "Strength of Slender Reinforced Concrete Columns under Biaxial Bending." Journal of Structural Engineering 127, no. 7 (July 2001): 758–62. http://dx.doi.org/10.1061/(asce)0733-9445(2001)127:7(758).

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Hales, Thomas A., Chris P. Pantelides, and Lawrence D. Reaveley. "Analytical buckling model for slender FRP-reinforced concrete columns." Composite Structures 176 (September 2017): 33–42. http://dx.doi.org/10.1016/j.compstruct.2017.05.034.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Ghaddar, Maha G. "Effect of Hollow Shape on the Behavior of Reinforced Self-Compacting Concrete Slender Column Under Eccentric Loading." Engineering and Technology Journal 39, no. 6 (June 25, 2021): 884–92. http://dx.doi.org/10.30684/etj.v39i6.1504.

Full text

Abstract:

Results of testing reinforced self-compacted concrete slender columns having longitudinal holes concealing PVC pipe in their cross sections under axial compression load and uniaxial bending are presented in this paper. The effect of hollow shape on the performance of slender columns having 200x200mm quadratic cross section and 1300mm long under concentric and eccentric loads was investigated. Three different shapes of central hole: circular, square, and lozenge pattern in addition to the different load eccentricity values were considered to investigate the axial loading resistance and cracking load, lateral and longitudinal deflections of the columns. Test results have showed that altering the hollow shape inside the area of column cross section does not show a great influence on the column behavior unless the hollow ratio changed. The effect of hole shape or the hollow ratio on loading capacity is insignificant but the existence of a hole embedded longitudinally in the column significantly decreases its ultimate capacity. The effect of hollow shape or hollow ratio on a slender columns behavior subjected to eccentric loading with small ratio of load eccentricity to total column thickness (e/h=.33) was more than that of large eccentricity (e/h=1.0). Accordingly, the decrease in loading column capacity of columns was (5.0%, 2.5%, and 6.6%) compared to (3.2%, 2.2%, and 4.7%) for the same hole shapes respectively.

APA, Harvard, Vancouver, ISO, and other styles

21

Mirza, S. A., and J. G. MacGregor. "Limit states design of concrete slender columns." Canadian Journal of Civil Engineering 14, no. 4 (August 1, 1987): 439–46. http://dx.doi.org/10.1139/l87-067.

Full text

Abstract:

The limit states design requires the use of load factors and resistance factors to consider the probability of overloading, understrength, or both. Research has been underway in Canada to introduce the probability-based limit states design for concrete structures. Based on the current knowledge of building load statistics, the National Building Code of Canada adopted a set of load factors which are different from those used in the Canadian Standards Association Standard A23.3-M77. This required the development of resistance factors that would be compatible with the load factors specified in the National Building Code of Canada. The research reported herein discusses the development of such resistance factors for use in computing the moment magnification of concrete slender columns. Key words: building codes, load factors, loads (forces), moment magnification, reinforced concrete, resistance, resistance factors, slender columns, stability, structural design.

APA, Harvard, Vancouver, ISO, and other styles

22

Benko, Vladimír, Peter Kendický, and Tomáš Gúcky. "Failure of Slender Concrete Columns of Loss of Stability." Key Engineering Materials 691 (May 2016): 185–94. http://dx.doi.org/10.4028/www.scientific.net/kem.691.185.

Full text

Abstract:

Experimental verification of global reliability of slender reinforced concrete columns from the regular concrete C45/55 and high performance concrete C70/85 was realized within the applied research of the Faculty of Civil Engineering at Slovak University of Technology in Bratislava (SUT). Production of test columns and samples was in cooperation with ZIPP Bratislava Ltd. Columns are designed in the way to collapse due to stability before the resistance of the critical cross-section is reached. The relative compression of concrete was scheduled about 1,5 ‰. For performed experimentally verified slender columns, the reliability of simplified and nonlinear design methods according to European standards was compared.

APA, Harvard, Vancouver, ISO, and other styles

23

Lu, Yiyan, Tao Zhu, Shan Li, Weijie Li, and Na Li. "Axial Behaviour of Slender RC Circular Columns Strengthened with Circular CFST Jackets." Advances in Civil Engineering 2018 (September 12, 2018): 1–11. http://dx.doi.org/10.1155/2018/7923575.

Full text

Abstract:

This paper investigates the axial behavior of slender reinforced concrete (RC) columns strengthened with concrete filled steel tube (CFST) jacketing technique. It is realized by pouring self-compacting concrete (SCC) into the gap between inner original slender RC columns and outer steel tubes. Nine specimens were prepared and tested to failure under axial compression: a control specimen without strengthening and eight specimens with heights ranging between 1240 and 2140 mm strengthened with CFST jacketing. Experimental variables included four different length-to-diameter (L/D) ratios, three different diameter-to-thickness (D/t) ratios, and three different SCC strengths. The experimental results showed that the outer steel tube provided confinement to the SCC and original slender RC columns and thus effectively improved the behavior of slender RC columns. The failure mode of slender RC columns was changed from brittle failure (concrete peel-off) into ductile failure (global bending) after strengthening. And, the load-bearing capacity, material utilization, and ductility of slender RC columns were significantly enhanced. The strengthening effect of CFST jacketing decreased with the increase of L/D ratio and D/t ratio but showed little variation with higher SCC strength. An existing expression of load-bearing capacity for traditional CFST columns was extended to propose a formula for the load-bearing capacity of CFST jacketed columns, and the predictions showed good agreement with the experimental results.

APA, Harvard, Vancouver, ISO, and other styles

24

Hernando, Javier García, Alejandro Perez Caldentey, Freddy Ariñez Fernández, and Hugo Corres Peiretti. "Design of Slender Reinforced Concrete Bridge Columns Considering the Interaction between Columns." Structural Engineering International 26, no. 1 (February 2016): 52–61. http://dx.doi.org/10.2749/101686616x14480232444360.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Hu, Zhongjun, Quanheng Li, Hongfeng Yan, and Yuchuan Wen. "Experimental Study on Slender CFRP-Confined Circular RC Columns under Axial Compression." Applied Sciences 11, no. 9 (April 27, 2021): 3968. http://dx.doi.org/10.3390/app11093968.

Full text

Abstract:

The test results on the performance of carbon fiber-reinforced polymer (CFRP)-confined reinforced concrete (RC) columns under axial compression load are presented in this study. Twelve slender CFRP-confined circular RC columns with a diameter of 200 mm were divided into two groups. Six specimens with different slenderness ratios of 12, 20, 32, 40, 48, and 56 were contained in each group. The experimental results demonstrated the circumferential CFRP wrap was effective in enhancing the ultimate axial load of slender CFRP-confined circular RC columns compared with unwrapped RC columns. The experimental investigation also showed that the slenderness of the specimens had important influences on the axial compressive behavior, and the axial bearing capacity of slender CFRP-confined circular RC columns decreased as the slenderness ratio increased. In order to predict the load-carrying capacities of slender CFRP-confined circular RC columns, a formula was proposed and the prediction agreed with the experiments. The slenderness of slender CFRP-confined circular RC columns was recommended to be less than 26.5 in practical engineering.

APA, Harvard, Vancouver, ISO, and other styles

26

A. S. Al- Shaarbaf, Ihsan, Mohammed J. H. Al-zubaidi, and Emad A. A. Al- Zaidy. "Effect of Hollowing Ratio on the Behavior of Hollow Self-Compacting Reinforced Concrete Slender Column Under Eccentric Loading." International Journal of Engineering & Technology 7, no. 4.20 (November 28, 2018): 390. http://dx.doi.org/10.14419/ijet.v7i4.20.26141.

Full text

Abstract:

In this research the behavior of reinforced concrete slender columns with longitudinal hole under axial compression load and uniaxial bending is investigated. The paper includes testing of ten slender columns with dimensions (150 150 1300 mm). The investigation deals with the effect of using different diameters of column hole on the values of the load carrying capacity and cracking loads, mid-height lateral deflection and longitudinal shortening of the columns. Five diameters for the column holes were considered (0, 25.4, 38.1, 50.8, and 76.2)mm. Test results have showed that when the holes were located at the center of the column cross-section and the column was loaded with high load eccentricity, the effect of hollowing ratio on load capacity is insignificant. For hollowing ratios used in this study (0%, 2.3% ,5.1%, 9% and 20.3%), the ultimate load is decreased by (0%, 0.28%, 1.03%, 3.28% and 6.48%) respectively. The effect of hollowing ratio on columns loaded with small eccentricity of 50mm (e/h=.33) is greater than the effect of hollow ratio of columns with 150 mm eccentricity(e/h=1.0) which reduces the load capacity for the columns by (0.00%, 0.66%, 2.65%, 4.97% and 11.26%) for hollowing ratios (0%, 2.3%, 5.1%, 9% and 20.3%) respectively.

APA, Harvard, Vancouver, ISO, and other styles

27

Choi, Sokhwan, Myung Lee, and Sung-Woo Lee. "Mechanical Behavior of Slender Concrete-Filled Fiber Reinforced Polymer Columns." Journal of the Korea Concrete Institute 16, no. 4 (August 1, 2004): 565–72. http://dx.doi.org/10.4334/jkci.2004.16.4.565.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Sarker, Prabir Kumar, and B. V. Rangan. "Simplified design of reinforced concrete slender columns for eccentric loadings." Australian Journal of Structural Engineering 5, no. 1 (January 2003): 9–16. http://dx.doi.org/10.1080/13287982.2003.11464923.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Gajdosova, Katarina, and Juraj Bilcik. "Full-Scale Testing of CFRP-Strengthened Slender Reinforced Concrete Columns." Journal of Composites for Construction 17, no. 2 (April 2013): 239–48. http://dx.doi.org/10.1061/(asce)cc.1943-5614.0000329.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Zhao, Gentian, Mengxi Zhang, and Yonghe Li. "Strength and Behaviour of Slender Steel Reinforced Concrete Composite Columns." Advances in Structural Engineering 13, no. 2 (April 2010): 231–39. http://dx.doi.org/10.1260/1369-4332.13.2.231.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Alkloub, Amer, Rabab Allouzi, and Hana Naghawi. "Numerical Nonlinear Buckling Analysis of Tapered Slender Reinforced Concrete Columns." International Journal of Civil Engineering 17, no. 8 (February 4, 2019): 1227–40. http://dx.doi.org/10.1007/s40999-019-00395-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Sumajouw, D. M. J., D. Hardjito, S. E. Wallah, and B. V. Rangan. "Fly ash-based geopolymer concrete: study of slender reinforced columns." Journal of Materials Science 42, no. 9 (December 12, 2006): 3124–30. http://dx.doi.org/10.1007/s10853-006-0523-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Abid, Muhammad, Haytham F. Isleem, Muhammad Kamal Kamal Shah, and Shayan Zeb. "Analytical Review on Eccentric Axial Compression Behavior of Short and Slender Circular RC Columns Strengthened Using CFRP." Polymers 13, no. 16 (August 17, 2021): 2763. http://dx.doi.org/10.3390/polym13162763.

Full text

Abstract:

Although reinforced concrete (RC) columns subjected to combined axial compression and flexural loads (i.e., eccentric load) are the most common structural members used in practice, research on FRP-confined circular RC columns subjected to eccentric axial compression has been very limited. More specifically, the available eccentric-loading models were mainly based on existing concentric stress–strain models of FRP-confined unreinforced concrete columns of small scale. The strength and ductility of FRP-strengthened slender circular RC columns predicted using these models showed significant errors. In light of such demand to date, this paper presents a stress–strain model for FRP-confined circular reinforced concrete (RC) columns under eccentric axial compression. The model is mainly based on observations of tests and results reported in the technical literature, in which 207 results of FRP-confined circular unreinforced and reinforced concrete columns were carefully studied and analyzed. A model for the axial-flexural interaction of FRP-confined concrete is also provided. Based on a full parametric analysis, a simple formula of the slenderness limit for FRP-strengthened RC columns is further provided. The proposed model considers the effects of key parameters such as longitudinal and hoop steel reinforcement, level of FRP hoop confinement, slenderness ratio, presence of longitudinal FRP wraps, and varying eccentricity ratio. The accuracy of the proposed model is finally validated through comparisons made between the predictions and the compiled test results.

APA, Harvard, Vancouver, ISO, and other styles

34

Yu, Chunyi, Hua Ma, Yongping Xie, Zhenbao Li, and Zhenyun Tang. "Size Effect on the Seismic Performance of High-Strength Reinforced Concrete Columns with Different Shear Span-to-Depth Ratios." Mathematical Problems in Engineering 2018 (December 19, 2018): 1–19. http://dx.doi.org/10.1155/2018/2723198.

Full text

Abstract:

The size effect on the seismic performance of conventional reinforced concrete columns has been observed in terms of flexural failure and shear failure. Under earthquake loading, slender columns experience flexural failure, and short columns experience flexure-shear failure and shear failure. However, the effect of section size on the seismic performance of high-strength reinforced concrete columns under the conditions of different shear span-to-depth ratios requires further confirmation. For this purpose, six high-strength reinforced concrete columns with shear span-to-depth ratios of 2 and 4 were subjected to cyclic loading in this study. The experimental results indicated that relative nominal flexural strength, energy dissipation coefficient, factor of safety, and local factor of safety all exhibited a strong size effect by decreasing with increasing column size. Furthermore, the size effect became stronger as the shear span-to-depth ratio was increased, except for average energy dissipation coefficient. The observed changes in the factor of safety were in good agreement with the Type 2 size effect model proposed by Bažant. Thus, based on the local factor of safety and Bažant’s Type 2 model, the code equation for moment capacity of different shear span-to-depth ratios was modified to provide a consistent factor of safety regardless of column size.

APA, Harvard, Vancouver, ISO, and other styles

35

AlHamaydeh, Mohammad, and Fouad Amin. "Data for Interaction Diagrams of Geopolymer FRC Slender Columns with Double-Layer GFRP and Steel Reinforcement." Data 6, no. 5 (April 26, 2021): 43. http://dx.doi.org/10.3390/data6050043.

Full text

Abstract:

This article provides data of axial load-bending moment capacities of plain and fiber-reinforced geopolymer concrete (GPC, FRGPC) columns. The columns were reinforced by double layers of longitudinal and transverse reinforcement using steel and/or glass-fiber-reinforced polymer (GFRP) bars. The concrete fiber-reinforcing materials included steel and synthetic fibers. The columns data included different parameters like the longitudinal reinforcement ratio, the applied load eccentricity, and the columns’ slenderness ratio. The data was collected from different analysis output files then sorted and tabulated in usable formatted tables. The data can support the development of design axial load-bending moment interactions. In addition, further processing of the data can yield analytical strength curves which are useful in determining the columns stability under different structural loading configurations. Researchers and educators can make use of these data for illustrations and prospective new research suggestions.

APA, Harvard, Vancouver, ISO, and other styles

36

Al-Thairy, Haitham, and Marwa Azeez Al-Hamzawi. "Behavior of Eccentrically Loaded Slender Concrete Columns Reinforced with GFRP Bars." Journal of Physics: Conference Series 1973, no. 1 (August 1, 2021): 012218. http://dx.doi.org/10.1088/1742-6596/1973/1/012218.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Calixto, J. M., T. H. Souza, and E. V. Maia. "Design of slender reinforced concrete rectangular columns subjected to eccentric loads by approximate methods." Revista IBRACON de Estruturas e Materiais 5, no. 4 (August 2012): 548–54. http://dx.doi.org/10.1590/s1983-41952012000400008.

Full text

Abstract:

Reinforced concrete codes worldwide establish that the design of slender columns must ensure that under the most unfavorable load combination, there is neither instability nor material failures. Thus, it is mandatory to consider material as well as geometrical nonlinearities. The consideration of second order effects can be done using simplified methods or the general method. This work analyses second order effects based on the approximate methods shown in NBR 6118 [1]: approximate curvature method and approximate stiffness procedure. Due to the importance of the columns in the stability of buildings is essential that these simplified design methods provide safe solutions for the design of columns. In this scenario, the objective of this study is to evaluate these simplified design procedures in terms of safety, precision and economy with respect to test results of RC slender columns subjected to eccentric loads found in the literature. The comparative analysis reveals that the approximate stiffness procedure provides better results.

APA, Harvard, Vancouver, ISO, and other styles

38

Abdualrahman, Safaa Qays, and Alaa Hussein Al-Zuhairi. "A Comparative Study of the Performance of Slender Reinforced Concrete Columns with Different Cross-Sectional Shapes." Fibers 8, no. 6 (June 4, 2020): 35. http://dx.doi.org/10.3390/fib8060035.

Full text

Abstract:

Most reinforced concrete (RC) structures are constructed with square/rectangular columns. The cross-section size of these types of columns is much larger than the thickness of their partitions. Therefore, parts of these columns are protruded out of the partitions. The emergence of columns edges out of the walls has some disadvantages. This limitation is difficult to be overcome with square or rectangular columns. To solve this problem, new types of RC columns called specially shaped reinforced concrete (SSRC) columns have been used as hidden columns. Besides, the use of SSRC columns provides many structural and architectural advantages as compared with rectangular columns. Therefore, this study was conducted to explain the structural performance of slender SSRC columns experimentally and numerically via nonlinear finite element analysis. The study is based on nine RC specimens tested up to failure, as well as eighteen finite element (FE) models analyzed by Abaqus soft wear program. The use of SSRC columns led to increase strength by about 12% and reduce deformations, especially with slenderness ratio more than 40 as compared with equivalent square-shaped columns. Two design formulas were proposed to determine the compressive strength of SSRC columns under concentric loading. The results obtained indicate a good structural performance of SSRC columns when compared with equivalent square-shaped columns.

APA, Harvard, Vancouver, ISO, and other styles

39

Alnuaimi, AS. "Effects of Copper Slag as a Replacement for Fine Aggregate on the Behavior and Ultimate Strength of Reinforced Concrete Slender Columns." Journal of Engineering Research [TJER] 9, no. 2 (December 1, 2012): 90. http://dx.doi.org/10.24200/tjer.vol9iss2pp90-102.

Full text

Abstract:

Use of copper slag (CS) as a replacement for fine aggregate (FA) in RC slender columns was experimentally investigated in this study. Twenty columns measuring 150 mm x150 mm x 2500 mm were tested for monotonic axial compression load until failure. The concrete mixture included ordinary Portland cement (OPC) cement, fine aggregate, 10 mm coarse aggregate, and CS. The cpercentage of cement, water and coarse aggregate were kept constant within the mixture, while the percentage of CS as a replacement for fine aggregate varied from 0 to 100%. Four 8 mm diameter high yield steel and 6 mm mild steel bars were used as longitudinal and transverse reinforcement, respectively. Five cubes measuring 100 mm x100 mm x100 mm, eight cylinders measuring 150 mm x 300 mm and five prisms measuring 100 mm x 100 mm x 500 mm were cast and tested for each mixture to determine the compressive and tensile strengths of the concrete. The results showed that the replacement of up to 40% of the fine aggregate with CS caused no major changes in concrete strength, column failure load, or measured flexural stiffness (EI). Further increasing the percentage reduced the concrete strength, column failure load, and flexural stiffness (EI), and increased concrete slump and lateral and vertical deflections of the column. The maximum difference in concrete strength between the mixes of 0% CS and 100% CS was 29%, with the difference between the measured/ control failure loads between the columns with 0 and 100% CS was 20% the maximum difference in the measured EI between the columns with 0 and 100% CS was 25%. The measured to calculated failure loads of all specimen varied between 91 and -100.02%. The measured steel strains were proportional to the failure loads. It was noted that columns with high percentages of CS (

APA, Harvard, Vancouver, ISO, and other styles

40

Tikka, Timo K., and S. Ali Mirza. "Equivalent uniform moment diagram factor for structural concrete columns." Canadian Journal of Civil Engineering 36, no. 2 (February 2009): 219–40. http://dx.doi.org/10.1139/l08-105.

Full text

Abstract:

The equivalent uniform bending moment diagram factor (Cm) was introduced into design practice to eliminate the need for extensive calculations, based on the solution to a differential equation, to compute the effect of moment gradient, along the column height, caused by unequal column end moments. The expression currently in use in the Canadian Standards Association (CSA) A23.3 standard is a simplified equation based on the elastic behaviour of columns, and does not include the inelastic material behaviour of structural concrete. This study was conducted to investigate the influence of different variables on Cm of slender, tied, reinforced concrete columns, and composite steel–concrete columns in which steel sections are encased in concrete, and also to examine existing expressions for Cm. Approximately, 38 000 simulated columns, each with a different combination of specified values of variables, were used to generate the Cm data. The columns studied were subjected to short-term ultimate loads and unequal end moments causing moment gradient in single curvature and double curvature bending. Two Cm design equations are proposed in this paper. One of the proposed equations is a modified version of the current CSA design equation for Cm.

APA, Harvard, Vancouver, ISO, and other styles

41

Han, Feng Xia, Liu Qing, and Han Xia. "Material Nonlinearity Effects on Dynamic Second-Order Effects of Slender RC Columns under Seismic Load." Applied Mechanics and Materials 353-356 (August 2013): 2145–48. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.2145.

Full text

Abstract:

This study investigates the influence of material nonlinear in slender reinforced concrete (RC) columns dynamic second-order effects under seismic load. The stiffness reduction coefficient is adopted in this paper. To identify the significance of various effects in terms of the dynamic second-order effects of the slender RC columns, nonlinear dynamic analyses are conducted for different periods and stability coefficients of simulated models with rare occurrence earthquake. On the basis of the obtained numerical results, the influence of material nonlinear for dynamic second-order effects are reviewed.

APA, Harvard, Vancouver, ISO, and other styles

42

Taso, W. H., and C. T. T. Hsu. "Behaviour of biaxially loaded square and L-shaped slender reinforced concrete columns." Magazine of Concrete Research 46, no. 169 (December 1994): 257–67. http://dx.doi.org/10.1680/macr.1994.46.169.257.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Rodrigues, E. A., O. L. Manzoli, L. A. G. Bitencourt Jr., P. G. C. dos Prazeres, and T. N. Bittencourt. "Failure behavior modeling of slender reinforced concrete columns subjected to eccentric load." Latin American Journal of Solids and Structures 12, no. 3 (March 2015): 520–41. http://dx.doi.org/10.1590/1679-78251224.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

S. Issa, Mohamed. "Theoretical and Experimental Study of Slender Concrete Columns Reinforced with GFRP Bars." International Scientific Research Journal 1, no. 07 (2015): 82–87. http://dx.doi.org/10.18483/irjsci.62.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Yan, Biao, Xuhong Zhou, and Jiepeng Liu. "Behavior of circular tubed steel-reinforced-concrete slender columns under eccentric compression." Journal of Constructional Steel Research 155 (April 2019): 342–54. http://dx.doi.org/10.1016/j.jcsr.2018.11.018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Bažant, Z. P., and Y. W. Kwon. "Failure of slender and stocky reinforced concrete columns: tests of size effect." Materials and Structures 27, no. 2 (March 1994): 79–90. http://dx.doi.org/10.1007/bf02472825.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Ren, Qingxin, Jinan Ding, Qinghe Wang, and Heqing Lou. "Behavior of slender square hollow steel-reinforced concrete columns under eccentric compression." Journal of Building Engineering 43 (November 2021): 103133. http://dx.doi.org/10.1016/j.jobe.2021.103133.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Guan, Hongbo, Yifei Xia, Jinli Wang, and Arsene Hugo Mbonyintege. "Influences of Slenderness and Eccentricity on the Mechanical Properties of Concrete-Filled GFRP Tube Columns." Polymers 13, no. 17 (August 31, 2021): 2968. http://dx.doi.org/10.3390/polym13172968.

Full text

Abstract:

The existence of either eccentricity or slenderness has a significant effect on the mechanical properties of a structure or member. These properties can change the working mechanism, failure mode, and bearing capacity of the structure or member. A concrete-filled, glass fibre-reinforced, polymer tube composite column has the same problem. We carried out experiments on the influences of eccentricity and slenderness on the mechanical properties of concrete-filled, glass fibre-reinforced, polymer tube composite columns. The experimentally recorded stress–strain relationships are presented graphically, and the ultimate axial stresses and strains and the FRP tube hoop strains at rupture were tabulated. The results indicate that the influences of slenderness and eccentricity on the composite columns were significant with regard to the axial strain, hoop strain, ultimate bearing capacity, lateral displacement, and failure mode. Based on the existing research literature and the results reported in this paper, the bearing capacity formula of a composite slender column under an eccentric load was established. The theoretical results were in good agreement with the experimental results.

APA, Harvard, Vancouver, ISO, and other styles

49

Abdulrahman, Ahmed R., Bahman O. Taha, and Muhsin K. Khdir. "Ductility and Strength Behavior of Reinforced Concrete Columns Confined by Glass and Carbon FRP Sheets." Open Civil Engineering Journal 14, no. 1 (June 5, 2020): 56–65. http://dx.doi.org/10.2174/1874149502014010056.

Full text

Abstract:

Background: Fiber reinforced composite materials are becoming popular in civil engineering construction practices. One of the most practical applications of these materials is concerned with the strengthening and retrofitting of reinforced concrete compression members by means of external confinement with the GFRP sheets. The role of FRP for strengthening of existing or new reinforced concrete structures is growing at an extremely rapid pace owing mainly to the ease and speed of construction, and the possibility of the application without disturbing the existing functionality of the structure. Objective: The ductility and strength behavior of reinforced concrete columns (Square & Circle) confined by glass and carbon Fiber Reinforced Polymer (FRP) sheets were experimentally investigated Methods: In the library, we tested and cast a total of fourteen column specimens. The tested specimens in this study were square and circle columns, the square specimens tested in this experimental study had dimensions of 135x135 mm cross-section while the circle specimens had 150 mm diameter. The columns were loaded at their supports and made prepared to avoid local failure at supports due to steel plates. Two types of fiber reinforcements sheets were used for strengthening the columns (Carbon and Glass fiber polymer sheets). To prevent the highly stressed slender longitudinal bars from buckling outward, adequate amounts of steel ties were utilized in the height of the columns. During the test of the columns, the central deflection and central fiber strains were measured using dia1 gauges and strain gauges Discussion: The CFRP strains progressed very slowly before the yielding of longitudinal reinforcement bars but quickly, eventually, due to the concrete expansion in the plastic hinge. The wrapped CFRP sheets contribute to both the shear strength and the confinement of concrete in column specimens. The results signify that the percentages of increase in the carrying load capacity due to strengthen, using carbon and glass FRP sheets, were greater in the circular columns compared with the square columns for all the types of confinements used in this study. The ductility factor increased by the strengthen column ranged between 1.35-2.78, while the greatest ductility factor obtained when the circular columns strengthen with glass FRP sheets fully wrapped. Conclusion: -The maximum ratio of increase in the carrying load capacity obtained when the column strengthens fully wrapped. - The columns (circular and square) strengthen with carbon FRP sheets, the greater carrying load capacity obtained when compared the columns strengthen with glass FRP sheets. -The percentages of increase in the carrying load capacity due to strengthen, using carbon and glass FRP sheets were greater in the circular columns compared with the square columns for all the types of confinements. - The stains developed in the confined circular columns are greater than stains in the confined square columns. -The ductility factor increased by the strengthen column, while the greatest ductility factor obtained when the circular columns strengthen with glass FRP sheets fully wrapped.

APA, Harvard, Vancouver, ISO, and other styles

50

Dobrý, Jakub, Marek Čuhák, Pavel Čížek, and Vladimír Benko. "Nonlinear Analysis and Comparison of Design Methods for Slender Concrete Columns with their Impact on Economy and Reliability." Solid State Phenomena 292 (June 2019): 197–202. http://dx.doi.org/10.4028/www.scientific.net/ssp.292.197.

Full text

Abstract:

The subject of this article is a comparison of the calculation methods for slender reinforced concrete columns, which are likely to lose stability, and therefore it is necessary to take into account the influence of the second order theory. The columns were calculated by the nominal curvature method [1] Chap.5.8.8 and the general nonlinear method [1] Chap.5.8.6 (3). Our comparison was aimed on the reliability of the design of the columns and the cost of the column. The analysis was made for the columns we selected from the halls built in practice. For this reason, we have asked for co-operation with Statika Čížek s.r.o.. This company has designed lot of hall objects during numerous years of its practise. In this study, we proposed a selected column located in a particular hall object. Parameters of the selected column have been slightly modified against the practical design. Reinforcement of selected column was designed using the curvature method. This proposal was then subjected to "optimization", where the task was to minimize the amount of concrete and minimize the amount of reinforcement with usage of a general nonlinear method. Then we compared the results of this analysis in terms of reliability and cost of production. This article aims to alert authorized engineers to be careful with usage of the general non-linear method in practice. It is questionable, whether saving money on the cost of building structure is worthwhile to design columns with significantly lower reliability. Sometimes even with the risk of a loss of stability that belongs to the category - brittle failures

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!