scholarly journals Longitudinal shear in composite deck slabs using corrugated steel sheets

2021 ◽  
Vol 30 (3) ◽  
pp. 411-423
Author(s):  
Hakim Alkurayshi ◽  
Alaa Dawood ◽  
Ahmed Hakim S. ◽  
Adnan Jawad
Keyword(s):  
Shear Force ◽  
Longitudinal Shear ◽  
Shear Transfer ◽  
Shear Connectors ◽  
Steel Sheets ◽  
Deck Slabs ◽  
Wide Range ◽  
Composite Slabs ◽  
Fabric Mesh ◽  
Bond Method

Profile deck steel sheets are used in composite deck slabs. These sheets are standard in dimensions and shapes besides they are supplied with embossments and indentations. Such sheets are not available in Iraqi markets nowadays therefore people used another type of sheets which are corrugated without embossments or indentations in very wide range. This study covers the use of such sheets in composite slabs as decks instead of standard profiled steel sheets. The study comprises testing slabs of dimensions 0.9 × 2.5 m reinforced by steel fabric mesh and rested on corrugated sheets. Two types of shear spans are selected shorter and longer to study the longitudinal shear force transmitted due to the applied loads according to the Eurocode 4. The shorter shear spans are 600, 500 and 400 mm while longer one is 800, 750 and 700 mm. The study extended to support the requirements of design equation of the Eurocode by shear bond method also known as m–k method. The evaluated values of m and k are 0.094 and 65 respectively. The result of k which plays a very important role in shear transfer is small compared to what available in literature, therefore it is recommended to make use of shear connectors in such construction or any else method.

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

scholarly journals Experimental Investigation on Composite Deck Slab Made of Cold-Formed Profiled Steel Sheeting

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 229
Author(s):  
Siva Avudaiappan ◽  
Erick I. Saavedra Flores ◽  
Gerardo Araya-Letelier ◽  
Walter Jonathan Thomas ◽  
Sudharshan N. Raman ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Test Results ◽  
Shear Connectors ◽  
Modes Of Failure ◽  
Deck Slabs ◽  
Load Carrying ◽  
Composite Slabs ◽  
Ultimate Load Carrying Capacity ◽  
Ductility Ratio ◽  
Deck Slab

An experimental investigation is performed on various cold-formed profiled sheets to study the connection behavior of composite deck slab actions using bolted shear connectors. Various profiles like dovetailed (or) re-entrant profiles, rectangular profiles and trapezoidal profiles are used in the present investigation. This experimental investigation deals with the evaluation of various parameters such as the ultimate load carrying capacity versus deflection, load versus slip, ductility ratio, strain energy and modes of failure in composite slab specimens with varying profiles. From the test results the performance of dovetailed profiled composite slabs’ resistance is significantly higher than the other two profiled composite deck slabs.

scholarly journals Investigations on Efficiently Interfaced Steel Concrete Composite Deck Slabs

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
K. N. Lakshmikandhan ◽  
P. Sivakumar ◽  
R. Ravichandran ◽  
S. Arul Jayachandran
Keyword(s):  
Longitudinal Shear ◽  
Advanced Technology ◽  
Shear Connector ◽  
Premature Failure ◽  
Shear Connectors ◽  
Reinforced Concrete Slabs ◽  
Composite Slabs ◽  
Strength And Stiffness ◽  
The Cost ◽  
Deck Slab

The strength of the composite deck slab depends mainly on the longitudinal shear transfer mechanism at the interface between steel and concrete. The bond strength developed by the cement paste is weak and causes premature failure of composite deck slab. This deficiency is effectively overcame by a shear transferring mechanism in the form of mechanical interlock through indentations, embossments, or fastening studs. Development of embossment patterns requires an advanced technology which makes the deck profile expensive. Fastening studs by welding weakens the joint strength and also escalates the cost. The present investigation is attempted to arrive at a better, simple interface mechanism. Three types of mechanical connector schemes are identified and investigated experimentally. All of the three shear connector schemes exhibited full shear interaction with negligible slip. The strength and stiffness of the composite slabs with shear connectors are superior about one and half time compared to these of the conventional reinforced concrete slabs and about twice compared to these of composite slabs without mechanical shear connectors. The scheme2 and scheme3 shear connector mechanisms integrate deck webs and improve strength and stiffness of the deck, which can effectively reduce the cost of formworks and supports efficiently.

scholarly journals Shear Capacity of Headed Studs in Steel-Concrete Structures: Analytical Prediction via Soft Computing

2020 ◽  
Author(s):  
Abambres M ◽  
He J
Keyword(s):  
Neural Network ◽  
Analytical Model ◽  
Composite Structures ◽  
Shear Force ◽  
Longitudinal Shear ◽  
Shear Capacity ◽  
Analytical Prediction ◽  
Neural Network Approach ◽  
Shear Connectors ◽  
Headed Stud

<p>Headed studs are commonly used as shear connectors to transfer longitudinal shear force at the interface between steel and concrete in composite structures (e.g., bridge decks). Code-based equations for predicting the shear capacity of headed studs are summarized. An artificial neural network (ANN)-based analytical model is proposed to estimate the shear capacity of headed steel studs. 234 push-out test results from previous published research were collected into a database in order to feed the simulated ANNs. Three parameters were identified as input variables for the prediction of the headed stud shear force at failure, namely the steel stud tensile strength and diameter, and the concrete (cylinder) compressive strength. The proposed ANN-based analytical model yielded, for all collected data, maximum and mean relative errors of 3.3 % and 0.6 %, respectively. Moreover, it was illustrated that, for that data, the neural network approach clearly outperforms the existing code-based equations, which yield mean errors greater than 13 %.</p>

Contribution of perforated steel ribs to load-carrying capacities of steel and concrete composite slabs under negative bending

2018 ◽  
Vol 21 (12) ◽  
pp. 1879-1894 ◽  
Author(s):  
Xiaoqing Xu ◽  
Yuqing Liu ◽  
Yize Zuo
Keyword(s):  
Failure Modes ◽  
Shear Crack ◽  
Shear Cracks ◽  
Shear Connectors ◽  
Deck Slabs ◽  
Load Carrying ◽  
Composite Slabs ◽  
Bridge Deck Slabs ◽  
Composite Bridge ◽  
Negative Bending

To attain a better understanding of the contribution of perforated steel ribs to the load-carrying capacities of steel and concrete composite slabs, six specimens with different shear connectors and areas of steel bars were tested under negative bending. Applied load, deformation, location and subsequent trajectory of cracks, strains, and failure mode of each specimen were recorded during the tests. Shear cracks were observed in two specimens, while in the other specimens only bending cracks were found. The perforated L-shaped ribs were proved to reduce the shear crack risk of composite bridge deck slabs and have a larger contribution to the loading-carrying capacities of composite slabs than plain ribs. Based on the experimental results, calculation methods were proposed to evaluate the flexural and shear strength of composite slabs. The calculated methods can quantitatively show the favorable influence of perforated steel ribs on the loading-carrying capacities of composite slabs, and the failure modes can be well predicted.

scholarly journals Monotonic and Fatigue Performance of Double-skin Push-out and Tensile Segments of Divers Shear Connectors – Review

2019 ◽  
Vol 22 (3) ◽  
pp. 213-221
Author(s):  
Zainab Hussam Alzahawy ◽  
Laith Khaled AL-Hadithy
Keyword(s):  
Shear Force ◽  
Shear Walls ◽  
Plain Concrete ◽  
Longitudinal Shear ◽  
Steel Plates ◽  
Composite Construction ◽  
Concrete Core ◽  
Shear Connectors ◽  
Double Skin ◽  
Push Out

Double skin composite (DSC) construction or Steel/concrete/steel sandwich construction (SCSS) is an innovative and relatively new form of composite construction that can be used in submerged tube tunnels, bridges deck, nuclear structures, liquid and gas containment structures, offshore and onshore structures, military shelters, and shear walls in buildings. The system consists of a plain concrete core sandwiched between two steel plates interconnected together by various types of mechanical shear connectors. The DSC construction perceives advantages that the external steel plates act as both formwork and primary reinforcement, and also as impermeable, blast and impact resistant membranes. The major duty of the shear connectors is to withstand longitudinal shear force and beam/slab separation, while in the bi-steel type where shear connectors are friction welded at both their two ends to two parallel steel plates, the longitudinal and transverse shear force, as well as plate buckling are resisted. The present paper highlights the previous prime researches concerning the subjects of SCSS composite construction, specifically on the conducted tests (push-out tests, tensile, direct shear tests, and bending tests) in which the components of partial interaction (uplift and slip forces) are resisted by various types of shear connectors.

scholarly journals Shear Capacity of Headed Studs in Steel-Concrete Structures: Analytical Prediction via Soft Computing

2021 ◽  
Author(s):  
Miguel Abambres ◽  
He J
Keyword(s):  
Neural Network ◽  
Analytical Model ◽  
Composite Structures ◽  
Shear Force ◽  
Longitudinal Shear ◽  
Shear Capacity ◽  
Analytical Prediction ◽  
Neural Network Approach ◽  
Shear Connectors ◽  
Headed Stud

<p>Headed studs are commonly used as shear connectors to transfer longitudinal shear force at the interface between steel and concrete in composite structures (e.g., bridge decks). Code-based equations for predicting the shear capacity of headed studs are summarized. An artificial neural network (ANN)-based analytical model is proposed to estimate the shear capacity of headed steel studs. 234 push-out test results from previous published research were collected into a database in order to feed the simulated ANNs. Three parameters were identified as input variables for the prediction of the headed stud shear force at failure, namely the steel stud tensile strength and diameter, and the concrete (cylinder) compressive strength. The proposed ANN-based analytical model yielded, for all collected data, maximum and mean relative errors of 3.3 % and 0.6 %, respectively. Moreover, it was illustrated that, for that data, the neural network approach clearly outperforms the existing code-based equations, which yield mean errors greater than 13 %.</p>

scholarly journals Shear Capacity of Headed Studs in Steel-Concrete Structures: Analytical Prediction via Soft Computing

2019 ◽  
Author(s):  
Miguel Abambres ◽  
Jun He
Keyword(s):  
Neural Network ◽  
Analytical Model ◽  
Composite Structures ◽  
Shear Force ◽  
Longitudinal Shear ◽  
Shear Capacity ◽  
Analytical Prediction ◽  
Neural Network Approach ◽  
Shear Connectors ◽  
Headed Stud

Headed studs are commonly used as shear connectors to transfer longitudinal shear force at the interface between steel and concrete in composite structures (e.g., bridge decks). Code-based equations for predicting the shear capacity of headed studs are summarized. An artificial neural network (ANN)-based analytical model is proposed to estimate the shear capacity of headed steel studs. 234 push-out test results from previous published research were collected into a database in order to feed the simulated ANNs. Three parameters were identified as input variables for the prediction of the headed stud shear force at failure, namely the steel stud tensile strength and diameter, and the concrete (cylinder) compressive strength. The proposed ANN-based analytical model yielded, for all collected data, maximum and mean relative errors of 3.3 % and 0.6 %, respectively. Moreover, it was illustrated that, for that data, the neural network approach clearly outperforms the existing code-based equations, which yield mean errors greater than 13 %.

scholarly journals Shear Capacity of Headed Studs in Steel-Concrete Structures: Analytical Prediction via Soft Computing

2020 ◽  
Author(s):  
Abambres M ◽  
He J
Keyword(s):  
Neural Network ◽  
Analytical Model ◽  
Composite Structures ◽  
Shear Force ◽  
Longitudinal Shear ◽  
Shear Capacity ◽  
Analytical Prediction ◽  
Neural Network Approach ◽  
Shear Connectors ◽  
Headed Stud

<p>Headed studs are commonly used as shear connectors to transfer longitudinal shear force at the interface between steel and concrete in composite structures (e.g., bridge decks). Code-based equations for predicting the shear capacity of headed studs are summarized. An artificial neural network (ANN)-based analytical model is proposed to estimate the shear capacity of headed steel studs. 234 push-out test results from previous published research were collected into a database in order to feed the simulated ANNs. Three parameters were identified as input variables for the prediction of the headed stud shear force at failure, namely the steel stud tensile strength and diameter, and the concrete (cylinder) compressive strength. The proposed ANN-based analytical model yielded, for all collected data, maximum and mean relative errors of 3.3 % and 0.6 %, respectively. Moreover, it was illustrated that, for that data, the neural network approach clearly outperforms the existing code-based equations, which yield mean errors greater than 13 %.</p>

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