scholarly journals Experimental study of the influence of friction at the supports on longitudinal shear resistance of composite slabs

2017 ◽  
Vol 10 (5) ◽  
pp. 1075-1086 ◽  
Author(s):  
R. S. COSTA ◽  
A. C. C. LAVALL ◽  
R. G. L. SILVA ◽  
F. C. RODRIGUES
Keyword(s):  
Structural Engineering ◽  
Shear Resistance ◽  
Longitudinal Shear ◽  
Shear Connection ◽  
Composite Slabs ◽  
Engineering Department ◽  
Trapezoidal Profile ◽  
Analytical Expressions ◽  
Steel Deck

Abstract The aim of this work is to evaluate the behavior and strength of composite slabs considering the influence of the friction at the sheeting-concrete interface in the region of the support. Results from tests conducted in the Structural Engineering Department of Federal University of Minas Gerais (UFMG) were used. A Steel Deck 60 system was considered, which consists of a trapezoidal profile with “V” shaped embossments. Deflections, end slips and strains of the steel decks were measured, allowing for the analysis of the behavior of the composite slab system and for the determination of its failure mode. The influence of friction of the region of support in the longitudinal shear resistance was evaluated through the partial shear connection method, which also allowed for establishing criteria and determination of analytical expressions for calculating the ultimate load. Comparative analyses reveal that the influence of the friction of the region of support in the shear-bond resistance is more significant in composite slabs with short shear spans. Design expressions which incorporate friction will also be presented. Their application have demonstrated the efficiency of the method for evaluating the longitudinal shear resistance.

Longitudinal shear resistance of PVA-ECC composite slabs

Structures ◽  
2016 ◽  
Vol 5 ◽  
pp. 247-257 ◽  
Author(s):  
Bashar S. Mohammed ◽  
Muhammad Aswin ◽  
Walden Harry Beatty ◽  
Muhammad Hafiz
Keyword(s):  
Shear Resistance ◽  
Longitudinal Shear ◽  
Composite Slabs

scholarly journals Experimental analysis of longitudinal shear of composite slabs

2020 ◽  
Vol 13 (3) ◽  
pp. 515-542
Author(s):  
G. F. J. BRITTO ◽  
V. S. SILVA ◽  
J. P. GONÇALVES
Keyword(s):  
Concrete Slab ◽  
Longitudinal Shear ◽  
Empirical Method ◽  
Linear Regression Method ◽  
Composite Slabs ◽  
Flexural Tests ◽  
Normative Models ◽  
Semi Empirical ◽  
New Procedures ◽  
Steel Deck

Abstract The composite concrete slab systems with steel-deck incorporated has become an alternative to conventional slab models, since it often does not require the use of shoring, promoting several constructive practices, beyond operation of the reinforcement as a positive moment. The procedure of verification of composite slabs is based on the semi-empirical method m and k. The purpose of this paper was to investigate the application of the "m-k method" in a group of slabs with alternative dimensions as the usually adopted in the tests, even as to correlate the values obtained with the results found when testing the models as proposed by the ANSI 2011 test standard, since the normative method is costly and expensive. Therefore, four-point flexural tests were performed on slab models considering only one deck module, varying two spans, the same procedure was repeated in slabs with usual construction dimensions (normative models). The linear regression method was applied to the data found in order to obtain the parameters that would be analyzed. The main results show that the alternative model with the adopted dimensions does not present values that can be applied directly to the normative models, since the increase of the shear span reduces in a significant way the theoretical resistance of the slabs. Nevertheless, the values for the m and k obtained of both alternative and normative models can be adopted confidently as part of the sizing process of the respective models. The deviations between theoretical and experimental resistance satisfy the specifications of the ANSI 2011 standard for both models helped in the confirmation of the previous statement. The expectation of this paper is to assist in the search for new procedures for determining parameters m and k.

scholarly journals The Effect of Adding Shear Connectors to the Composite Slabs with Different Geometry of Profile Steel Sheet

2021 ◽  
Vol 14 (2) ◽  
pp. 1-17
Author(s):  
Ibrahim Abbas ◽  
Amer M. Ibrahim ◽  
Teeba A. Jassim
Keyword(s):  
Load Capacity ◽  
Shear Resistance ◽  
Longitudinal Shear ◽  
Point Load ◽  
Ultimate Load Capacity ◽  
Composite Slab ◽  
Shear Connectors ◽  
Trapezoidal Shape ◽  
Deck Slabs ◽  
Composite Slabs

The aim of this research is to investigate experimentally the effect of adding shear connectors to the composite deck slabs which have various geometries of steel sheeting. The behavior and resistance of composite slab is basically depending on the development of longitudinal shear resistance. In this study six specimens of composite deck slabs which have different types of geometries of steel sheets (trapezoidal, triangle and T-shapes) with dimensions (1850mm x 500mm x 110mm) were casted and tested under four-point load in presence and absence of shear connectors in order to evaluate the behavior and longitudinal shear resistance of composite slabs. The results show that the adding shear connectors to composite slabs with trapezoidal shape and triangle shape act to increase ultimate load capacity by 22.2% and 17.8% respectively as compared with composite slabs without shear connectors while effect of adding shear connectors to the composite slab with T-shape was very little or can be neglected. As well as the adding shear connectors to composite slabs with trapezoidal shape and triangle shape act to decreasing the deflection as compared with the same load also act to enhance the general performance of slabs

Composite Slabs with Prepressed Embossments – Longitudinal Shear Resistance

2015 ◽  
Vol 769 ◽  
pp. 289-293
Author(s):  
Josef Holomek ◽  
Miroslav Bajer ◽  
Jan Barnat ◽  
Martin Vild
Keyword(s):  
Failure Mode ◽  
Shear Failure ◽  
Numerical Models ◽  
Shear Resistance ◽  
Longitudinal Shear ◽  
Small Scale ◽  
Bending Tests ◽  
Composite Action ◽  
Composite Slabs ◽  
Shear Characteristics

Composite slabs with prepressed embossments present an effective solution for horizontal structures. Prepressed embossments ensure composite action after hardening of concrete. Longitudinal shear failure mode typically governs if the shear resistance of embossments is not sufficient for full composite action. Mutual separation of thin-walled sheeting from concrete and its deformation inside the rib is characteristic for this failure mode. Design methods for composite slabs use full scale bending tests in several series to determine their bearing capacity. A less expensive alternative is to use small-scale shear tests to determine shear characteristics of the sheeting. This paper presents detailed numerical models of slab in shear and models of slab in bending with and without embossments. These models are compared with previously performed experiments. Key WordsComposite slab; steel sheeting; concrete; prepressed embossment; longitudinal shear; experiment; numerical model

Longitudinal shear resistance of composite slabs

2014 ◽  
Vol 167 (10) ◽  
pp. 610-617 ◽  
Author(s):  
Stephen James Hicks ◽  
Andrew Fawcett Pennington ◽  
Audsley Sarah Jones
Keyword(s):  
Shear Resistance ◽  
Longitudinal Shear ◽  
Composite Slabs

Prediction of longitudinal shear resistance of steel-concrete composite slabs

2019 ◽  
Vol 193 ◽  
pp. 295-300 ◽  
Author(s):  
Saddam M. Ahmed ◽  
Siva Avudaiappan ◽  
Ikhlas S. Sheet ◽  
Erick I. Saavedra Flores ◽  
Juan C. Pina ◽  
...  
Keyword(s):  
Shear Resistance ◽  
Longitudinal Shear ◽  
Composite Slabs
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