Influence of the Load Tranference Method on Short Tube Concrete Elements Filled With High-Strength Concrete

Storozhenko, Leonid; Yermolenko, Dmitry; Demchenko, Oksana

doi:10.18664/1994-7852.149.2014.81839

Cited by 5 publications

(8 citation statements)

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“…In the first case, thin-wall steel concrete circular columns with t < 2.5 mm, ratio L/D ≥ 4, column diameter varying within 76 ≤ D ≤ 210 mm, length 500 ≤ L ≤ 2750 mm, yield strength of steel 186 ≤ σy ≤ 490 MPa, modulus of elasticity of steel 1.68·10 5 ≤ Es ≤ 2.17·10 5 MPa, prism strength of concrete 10 ≤ fc,prizm ≤ 50 MPa, modulus of elasticity of concrete 2.0·10 4 ≤ Ec ≤ 3.6·10 4 MPa were considered. In the series of n = 40 observations, a factor regression model was obtained as follows:…”

Section: Cfst Long Thin-walled Columnsmentioning

confidence: 99%

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Regression equations for circular CFST columns carrying capacity evaluation

et al. 2017

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Abstract. Within the last decades, a considerable amount of experimental studies have been carried out by numerous researchers across the world with the purpose to study the carrying capacity of concrete-filled steel tubular (CFST) columns and evaluation of their stressed-strained state. The array of the obtained results have allowed designing a mathematical model to determine the maximum carrying capacity value of such constructions using the methods of mathematical statistics. The authors obtained three types of regression equations for short and long circular CFST columns with different geometrical and physical properties under axial compression. Statistical quality of the obtained models was verified by both regression equation quality in general and statistical significance of the equation parameters. The comparison of the obtained carrying capacity values with the results calculated by Eurocode 4 and AIJ methodologies allows making a conclusion on the sufficient calculation accuracy of the designed mathematical models.

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Section: Cfst Long Thin-walled Columnsmentioning

confidence: 99%

“…The extensive experimental data set on carrying capacity of the columns under various loading conditions assembled within the latest decades by the researchers across the world has enabled to study the behaviour of the columns using the techniques of mathematical statistics [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Regression equations for circular CFST columns carrying capacity evaluation

et al. 2017

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“…Analysis of research and publications. Today, buildings and structures that are designed and constructed using tube confined concrete are presented practically all over the world [4,5]. At the same time, the question of ambiguity in the calculation of such structures hinders the widespread introduction of this combination of steel and concrete, including taking into account the strengthening of their cores.…”

Section: Introductionmentioning

confidence: 99%

“…Considering a number of advantages that draw attention to the presented structures [5][6][7], the previously conducted experiments were aimed at clarifying the mechanism of development of the stress strain-state of tube confined concrete elements with a strengthened core for a more accurate and specific evaluation of their characteristics [7,8].…”

Section: Introductionmentioning

confidence: 99%

Analytical calculation of tube confined concrete elements with strengthened cores

et al. 2021

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The approach to the formation of the analytical method of evaluation of the stress-strain state of complex rod bearing structural elements is considered in the paper. The prerequisites described cover all the fundamental features of deformation of the components in conditions of tube confined concrete with a strengthened core. This is confirmed by the results of our own experimental studies. The case of central axial compression is considered in detail. From the beginning of loading to destruction of a structural element, two fundamentally different stages of work are distinguished: in the beginning – elastic; closer to destruction – plastic. The method of variable elasticity parameters is used to describe the performance of concrete in the plastic stage. The mutual influence of components during deformation is revealed by solving the contact problem. The methodology was tested by comparing the results of our own experimental and theoretical results.

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“…However, the known studies of CFST members [2,3] are mostly dedicated to the study of its operational features under the load and to its stress-strain state.…”

Section: Introductionmentioning

confidence: 99%

Study of technological features of tubular compressed concrete members in concreting

Voskobiinyk

Gukasian

2017

MATEC Web Conf.

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Abstract. The technological features of core concreting were analyzed as the main factor in ensuring of strength and reliability of compressed concrete-filled steel tubular (CFST) members. We have conducted the analysis of existing concreting methods of CFST members. In this respect, the most dangerous types of possible technological defects of concrete core of CFST members are inhomogeneity along the height, voids, caverns, and concrete "weak spots". The authors considered the influence of such technological factors of concreting: placeability, time, concrete mixture compaction method, concreting height on the concrete core strength of CFST members. Based on the experimental studies conducted we suggested the regression correlations for determining the concrete strength of CFST members of different length depending on the movability of concrete mixture and a time for its compaction. The authors performed the correlation analysis of technological factors of concreting on the strength of the concrete core. We carried out the comparison of data on the concrete core strength of CFST members, that were determined by non-destructive methods (sclerometer test results, ultrasonic method) and direct compression strength tests. We experimentally proved that using movable mixtures with the slump of about 4 -9 cm the overall variation coefficient of concrete core strength of CFST members along the height reaches nearly 13%. Based on the experimental studies conducted we suggested the guidelines on optimal regimes of concrete compaction during manufacturing CFST members at a construction site environment.

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Influence of the Load Tranference Method on Short Tube Concrete Elements Filled With High-Strength Concrete

Cited by 5 publications

References 0 publications

Regression equations for circular CFST columns carrying capacity evaluation

Regression equations for circular CFST columns carrying capacity evaluation

Analytical calculation of tube confined concrete elements with strengthened cores

Study of technological features of tubular compressed concrete members in concreting

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