Punching Shear Failure of Concrete Ground Supported Slab

Sucharda, Oldřích; Smirakova, Martina; Vaskova, Jana; Matečková, Pavlína; Kubosek, Jan; Čajka, Radim

doi:10.1186/s40069-018-0263-6

Cited by 38 publications

(21 citation statements)

References 23 publications

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“…The bearing capacity of slabs G05 (25 kg of fibers per m 3 ), G06 (50 kg of fibers per m 3 ), and G07 (75 kg of fibers per m 3 ) corresponded to 478 kN, 550 kN, and 635 kN, respectively. This paper is primarily focused on the soil stress analysis below the slab, and additional detailed information relating to slab behavior during the mentioned experimental works have been explored in other papers [24][25][26]. The comparison of stresses below the three investigated slabs-G05, G06, and G07-related to the loading of 125 kN (before the slab uplift) is presented in Figure 9.…”

Section: Results Of Experimental Workmentioning

confidence: 99%

Experimental Analysis of Stresses in Subsoil below a Rectangular Fiber Concrete Slab †

et al. 2018

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This paper is focused on sensitivity analysis of the behavior of subsoil foundation systems by considering the variant properties of a fiber concrete slab that result in different relative stiffness of the whole cooperating system. The character of the slab and its properties are very important for the character of external load transfer. However, the character of the subsoil also cannot be neglected because it determines the stress-strain behavior of the entire system and, consequently, the bearing capacity of the structure. The sensitivity analysis was carried out based on experimental results, which included both the stress values in the soil below the foundation structure and settlements of the structure that are characterized by different quantities of fibers in it. Flat GEOKON dynamometers were used for the stress measurements below the observed slab, the strains inside the slab were registered by tensometers, and the settlements were monitored geodetically. This paper is focused on the comparison of soil stresses below the slab for different quantities of fibers in the structure. Results obtained from the experimental stand can contribute to more objective knowledge of the soil-slab interaction, the evaluation of real carrying capacity of the slab, the calibration of corresponding numerical models, the optimization of quantity of fibers in the slab and finally, contribute to higher safety and more economical designs of slabs.

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Section: Results Of Experimental Workmentioning

confidence: 99%

Experimental Analysis of Stresses in Subsoil below a Rectangular Fiber Concrete Slab †

et al. 2018

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“…Numerical modeling [1,2], together with experiments [3][4][5][6][7], enables a detailed understanding of the real behavior of structures and structural optimization. The search for new and innovative design solutions is then associated with the use of advanced materials [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling and Analysis of Concrete Slabs in Interaction with Subsoil

et al. 2020

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This article focuses on the analysis and numerical modeling of a concrete slab interacting with subsoil. This is a complex task for which a number of factors enter into the calculation, including the scope or dimension of the model, the non-linear solution approach, the choice of input parameters, and so forth. The aim of this article is to present one possible approach, which is based on a non-linear analysis and a three-dimensional computational model. Five slabs were chosen for modeling and analysis. The experiments involved slabs of 2000 × 2000 mm and a thickness of 150 mm, which were tested using specialized equipment. The slabs included a reinforced concrete slab, a standard concrete slab, and three fiber-reinforced concrete slabs. The fiber-reinforced slabs had fiber volume fractions of 0.32%, 0.64%, and 0.96%, which corresponded to fiber dosages of 25, 50, and 75 kg/m3. A reinforced concrete slab was chosen for the calibration model and the initial parametric study. The numerical modeling itself was based on a detailed evaluation of experiments, tests, and recommendations. The finite element method was used to solve the three-dimensional numerical model, where the fracture-plastic material of the model was used for concrete and fiber-reinforced concrete. In this paper, the performed numerical analyses are compared and evaluated, and recommendations are made for solving this problem.

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“…The common applications of fiber concrete include industrial floors [6,7] and universal slabs exposed to point or linear mechanical loads in interaction with the subsoil, with prospective punching failure [8][9][10] or general shear failure [11,12]. The design of fiber concrete slabs requires comprehensive knowledge of the input parameters [13,14], especially the mechanical properties determined by specialized laboratory tests.…”

Section: Introductionmentioning

confidence: 99%

Experiments on Fiber Concrete Foundation Slabs in Interaction with the Subsoil

et al. 2020

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This article focuses on researching the interactions of fiber concrete slabs with subsoil. The experimental series includes four slabs made of fiber concrete with different dosages of fibers, from 0 to 75 kg/m3. The slabs were exposed to a loading test on a specialized loading frame. The laboratory tests for detailed descriptions of the fiber concrete’s mechanical properties were also an integral part of the experiments, including tests of the compressive strength, the modulus of elasticity, and split and bending tensile strength. Each slab’s deformation in a particular load step was evaluated in two-dimensional (2D) sections based on data measured with displacement sensors and in three-dimensional (3D) charts with the use of interpolation.

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Punching Shear Failure of Concrete Ground Supported Slab

Cited by 38 publications

References 23 publications

Experimental Analysis of Stresses in Subsoil below a Rectangular Fiber Concrete Slab †

Experimental Analysis of Stresses in Subsoil below a Rectangular Fiber Concrete Slab †

Numerical Modeling and Analysis of Concrete Slabs in Interaction with Subsoil

Experiments on Fiber Concrete Foundation Slabs in Interaction with the Subsoil

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