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

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>

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>

scholarly journals Parametric Push-Out Analysis on Perfobond Rib with Headed Stud Mixed Shear Connector

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Shuangjie Zheng ◽  
Chen Zhao ◽  
Yangqing Liu
Keyword(s):  
Composite Structures ◽  
Shear Capacity ◽  
Nonlinear Finite Element ◽  
Steel Beam ◽  
Shear Connector ◽  
Shear Connectors ◽  
New Type ◽  
Headed Stud ◽  
Structural Behaviors ◽  
Push Out

In steel and concrete composite structures, it is unfavourable to install many headed studs or perfobond ribs with narrow spacings at the joints. To solve this problem, a new type of a mixed shear connector was developed by combining a headed stud and perfobond rib at the same steel beam flange. In this paper, totally nine push-out tests were conducted. The main purpose was to compare the failure mode and the load-slip behavior of the headed stud, perfobond rib, and mixed shear connector. Furthermore, 19 nonlinear finite element simulations were performed. The effects of connector dimension and material properties on the structural behaviors of mixed shear connectors were studied. Based on the experimental and parametric study, an analytical equation was finally proposed to evaluate the shear capacity of perfobond rib with a headed stud mixed shear connector.

scholarly journals Finite element analysis of bolt shear connection of steel-concrete composite structure

2020 ◽  
Vol 198 ◽  
pp. 01027
Author(s):  
Zhishun Pan
Keyword(s):  
Finite Element ◽  
Composite Structure ◽  
Composite Structures ◽  
Mechanical Performance ◽  
Concrete Strength ◽  
High Strength ◽  
Shear Capacity ◽  
Simulation Software ◽  
Element Analysis ◽  
Shear Connectors

Bolted shear connectors are an important component to ensure that steel-concrete composite structures can work together. High-strength bolt shear connectors can replace traditional stud connectors because of their disassembly, good mechanical performance and fatigue resistance. It applied to steel-concrete composite structure. In order to study the influencing factors of the bearing capacity of high-strength bolted shear connectors, this paper uses ABAQUS finite element simulation software as a research tool to establish a reasonable finite element model to study the influence of bolt strength, bolt diameter and concrete strength on bolted shear connectors. Studies have shown that increasing the diameter, strength, and concrete strength of bolted connections can effectively increase the bolt’s shear capacity.

Push-out tests of demountable headed stud shear connectors in steel-UHPC composite structures

2017 ◽  
Vol 170 ◽  
pp. 69-79 ◽  
Author(s):  
Jun-Yan Wang ◽  
Jun-Yuan Guo ◽  
Liang-Jiu Jia ◽  
Shi-Ming Chen ◽  
Yang Dong
Keyword(s):  
Composite Structures ◽  
Shear Connectors ◽  
Headed Stud ◽  
Push Out

scholarly journals Demountable composite steel-concrete floors: A state-of-the-art review

2021 ◽  
Vol 73 (03) ◽  
pp. 249-263
Keyword(s):  
Sustainable Development ◽  
Composite Structures ◽  
Shear Force ◽  
State Of The Art ◽  
Composite Slab ◽  
Research Results ◽  
Shear Connectors ◽  
The Past ◽  
Numerical Research ◽  
Push Out

In keeping with current demands for sustainable development in all segments of the industry, numerous research in the field of steel-concrete composite structures has been focused on developing demountable shear connectors. In the past years, various demountable shear connectors have been suggested, with various mechanisms for transferring shear force between a steel profile and a concrete or composite slab. In this paper, a state of the art on the topic is given, and experimental and numerical research results of push-out and beam tests are summarized.

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.

Mechanical Behavior of the Shear Studs on Composite Deck of Steel Arch Bridge

2011 ◽  
Vol 374-377 ◽  
pp. 2480-2483 ◽  
Author(s):  
Zu Lin He ◽  
Wei Ping Zhong ◽  
Wan Jun Zhang ◽  
Chong Wu ◽  
Fei Qin ◽  
...  
Keyword(s):  
Composite Structures ◽  
Shear Force ◽  
Structural Characteristics ◽  
Bridge Decks ◽  
Tensile Force ◽  
Element Model ◽  
Longitudinal Shear ◽  
Arch Bridge ◽  
Mechanical Responses ◽  
Calculation Results

Shear studs are critical important connectors in steel and concrete composite structures, and they will subjected to longitudinal shear force and transverse shear force, and as well as the tensile force under the applied loads. The mechanical behaviors of the studs are very complicated. In this paper, the spatial finite element model of Xinshiji Bridge, a steel truss arch bridge, was established, and the mechanical responses of the studs under various load cased were analyzed. The calculation results show that the shear forces of the studs under the dead loads are very small due to the structural characteristics of the bridge and the construction sequence of the bridge decks. Thermal effects, especially the effect due to temperature difference, are the key factors for the design of the studs in region near the ends of the bridge decks.

A parametric study of perfobond rib shear connectors

1994 ◽  
Vol 21 (4) ◽  
pp. 614-625 ◽  
Author(s):  
E. C. Oguejiofor ◽  
M. U. Hosain
Keyword(s):  
Compressive Strength ◽  
Shear Capacity ◽  
Transverse Reinforcement ◽  
Shear Connectors ◽  
Shear Connection ◽  
New Type ◽  
Flat Steel ◽  
Compressive Strength Of Concrete ◽  
Headed Stud ◽  
Push Out

This paper summarizes the results of 40 push-out test specimens with a new type of shear connector called perfobond rib. This connector is a flat steel plate with a number of holes punched through. The test specimens were designed to study the effect of a number of parameters on the shear capacity of the connection. These were the number and spacing of rib holes, transverse reinforcement, and compressive strength of concrete. The main objective of this study was to derive an expression for predicting the capacity of perfobond rib connector based on the results of the parametric study.The test results indicate that the shear capacity of the perfobond rib connector increases with the number of rib holes as long as the hole spacing is at least 2.25 times the diameter of the holes. The effect of increasing the transverse reinforcement ratio from 0.27% to 0.36% was an increase of approximately 16% in the shear capacity of the connection. Similarly, an increase of 36% in the shear connection capacity was achieved due to a 63% increase in concrete strength.An expression for computing the shear capacity of perfobond rib connectors is proposed. A regression analysis, which is based on a model that takes into account the contributions of concrete dowels formed by the rib holes, the transverse reinforcement, and the strength of concrete, was used in the derivation. Key words: composite beam, perfobond rib connector, headed stud, push-out test, compressive strength of concrete, transverse reinforcement.

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