FIRE RESISTACE OF SHEAR CONNECTORS FOR COMPOSITE BEAMS

2020 ◽  
Vol 92 (6) ◽  
pp. 59-65
Author(s):  
G.P. TONKIH ◽  
◽  
D.A. CHESNOKOV ◽  
◽  
Keyword(s):  
Fire Resistance ◽  
Composite Structure ◽  
Composite Structures ◽  
Composite Beams ◽  
Design Codes ◽  
Connection Strength ◽  
Shear Connectors ◽  
Shear Connection ◽  
Capacity Reduction ◽  
Russian Research

Most of Russian research about composite structure fire resistance are dedicated to the composite slab behavior. The composite beams fire resistance had been never investigated in enough volume: the temperature evaluation within the scope of the actual Russian design codes leads to the significant reduction in the shear connection strength. Meanwhile, there no correlation between the strength decreasing and type of the shear connection. The article provides an overview of the relevant researches and offers some approaches which could take into account bearing capacity reduction of the shear connectors within composite structures design.

Reliability analysis of shear connection in composite beams with profiled steel sheeting

2011 ◽  
Vol 8 (1) ◽  
pp. 29-34
Author(s):  
M. Youcef ◽  
M. Mimoune ◽  
F. Mimoune
Keyword(s):  
Reliability Analysis ◽  
Failure Modes ◽  
Composite Beams ◽  
Steel Beam ◽  
British Standard ◽  
Shear Connectors ◽  
Shear Connection ◽  
Composite Slabs ◽  
European Code ◽  
Headed Stud

This paper describes the reliability analysis of shear connection in composite beams with profiled steel sheeting. The profiled steel sheeting had transverse ribs perpendicular to the steel beam. The level of safety of shear connection, and failure modes were determinate. An extensive parametric study was conducted to study the effects on the safety and behaviour of shear connection by changing the profiled steel sheeting geometries, the diameter and height of headed stud, as well as the strength of concrete. We compared the level safety calculated using the American specification, British standard and European code for headed stud shear connectors in composite slabs with profiled steel sheeting perpendicular to the steel beam. It is found that the design overestimated the level safety of shear connection.

ESTIMATION OF THE POWDER-ACTUATED SHEAR CONNECTORS TESTS

2021 ◽  
Vol 295 (2) ◽  
pp. 16-26
Author(s):  
D.V. Konin ◽  
Keyword(s):  
Bearing Capacity ◽  
Estimation Methods ◽  
Shear Connector ◽  
Connection Strength ◽  
Test Results ◽  
European Standard ◽  
Design Code ◽  
Shear Connectors ◽  
Shear Connection

The shear connector design should be executed according to the SP 266.1325800.2016. For the different typed of welded connectors are there analytic dependences, which could be used for shear connection strength estimation. The design code also allows to use powder-actuated Z-shape shear connectors. Their bearing capacity should be proved by tests according to the GOST R 58336-2018. Inasmuch the GOST doesn't consist the test estimation approach, the authors offer the method. For the test estimation methods the test results of 15 series specimen had been used. The results were compared with estimation according to the European standard for the verification.

Theoretical Analysis of Shearing Capacity of U-Section Steel-Encased Concrete Composite Beams with the Full Connection Design

2011 ◽  
Vol 94-96 ◽  
pp. 958-961
Author(s):  
Xue Jun Zhou ◽  
Ting Zhang
Keyword(s):  
Theoretical Analysis ◽  
Composite Beams ◽  
Vertical Shear ◽  
Calculation Formula ◽  
Shear Connectors ◽  
Shear Connection ◽  
Shear Performance ◽  
Weak Plane ◽  
Connection Design ◽  
Relative Slippage

In this article, by studying the horizontal and vertical shear performance, the calculation formula for the fully shear connection is proposed. In order to avoid the overall vertical relative slippage between the steel and concrete, the vertical slippage formula is proposed to calculate the required number of the shear connectors for the first weak plane and second weak plane.

scholarly journals Study on Behaviour of Stud Type Shear Connector in Composite Beam Using ANSYS

2018 ◽  
Vol 7 (3.10) ◽  
pp. 54
Author(s):  
T Subramani ◽  
A Periasamy
Keyword(s):  
Composite Beam ◽  
Composite Structures ◽  
Numerical Models ◽  
Concrete Slab ◽  
Composite Beams ◽  
Vital Role ◽  
Shear Connector ◽  
Structural Behaviour ◽  
Shear Connectors ◽  
High Rise

Composite plays a vital role in replacing the existing mild steel in reinforcement and exterior truss structure. This study proposed to design shear connector for joining concrete slab and steel section. Shear connectors has analyzed and predict the best connector for a particular composite beam with respect to static load and the amount of steel in the connector as a common aspect. The use of composite structures is increasingly present in civil construction works nowadays. Composite beams, especially, are structures which include substances, a metal phase placed in particular inside the tension region and a concrete phase, positioned in the compression go sectional location, both are related with the aid of steel gadgets called shear connectors. The main features of this connector are to permit the weight for the joint the beam-column, to restriction longitudinal slipping and uplifting on the factors interface the shear forces. Our project paper presents 3D numerical models of steel-concrete composite beams to simulate their structural behaviour, with emphasis on the beam column interface using Simulations software ANSYS 18.1 based on the Finite Element Method. Mostly these type of structures are widely used in the dynamic loading structures like bridges and high rise buildings.  

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.

Mindestverdübelung von Verbundträgern mit kleinskaligen Verbundmitteln – Herleitung des Mindestverdübelungsgrades durch systematischen Einsatz nicht-linearer Finite-Elemente-Berechnungen/Minimum partial shear connection of composite beams with small scaled shear connectors – Derivation of the minimum degree of partial shear connection by systematic use of nonlinear Finite Element Analysis (FEA).

Bauingenieur ◽  
2016 ◽  
Vol 91 (04) ◽  
pp. 140-151
Author(s):  
Martin Herbrand ◽  
Martin Classen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Minimum Degree ◽  
Nonlinear Finite Element Analysis ◽  
Composite Beams ◽  
Nonlinear Finite Element ◽  
Element Analysis ◽  
Shear Connectors ◽  
Shear Connection ◽  
Finite Elemente

Die Entwicklung neuartiger Verbundmittel für Stahl-Beton-Verbundkonstruktionen ist aktuell mit einem enormen experimentellen Aufwand verbunden. Zur Herleitung geeigneter Bemessungsmodelle und zulässiger Anwendungsbereiche sind einerseits umfangreiche Versuchsreihen zur Erforschung des lokalen Schubtrag- und Verformungsverhaltens der neuen Verbundmittel erforderlich, andererseits werden kostspielige Trägerversuche zur Untersuchung des globalen Tragverhaltens der neuartigen Verbundmittel im Verbundträger durchgeführt. Hierbei steht insbesondere die Frage nach dem erforderlichen Mindestverdübelungsgrad der neuartigen Verbundmittel im Vordergrund. Am Beispiel des innovativen Pin-Verbundmittels wird im Rahmen dieses Beitrags untersucht, inwiefern validierte Finite-Elemente-Modelle von Verbundträgern, die neben der Schubtragfähigkeit auch das Verformungsvermögen der neuartigen Verbundmittel berücksichtigen, zur Herleitung von Mindestverdübelungsgraden eingesetzt werden können und in welchem Maße diese Modelle zum Ersatz oder Teilersatz von Trägerversuchen geeignet sind. Die hier betrachteten kleinskaligen Pin-Verbundmittel wurden zur Schubsicherung in Verbundstrukturen aus Stahl und sehr dünnen hochfesten Betongurten entwickelt, in denen konventionelle Verbundmittel wie Kopfbolzdübel aufgrund der begrenzten Einbindetiefen nicht eingesetzt werden können. Der Beitrag beschreibt die Entwicklung geeigneter nicht-linearer Finite-Elemente-Modelle von Verbundträgern, die Validierung der Modelle an Versuchen und die Durchführung systematischer Parameterrechnungen zur Herleitung von Mindestverdübelungsgraden bei unterschiedlichen Trägerlängen und Belastungssituationen. Abschließend wird für den untersuchten Verbundquerschnitt mit Pin-Verbundmittel ein Handrechenmodell zur Bestimmung des erforderlichen Mindestverdübelungsgrades in Abhängigkeit von der Trägerlänge angegeben. Die vorgeschlagene FE-Modellierungsform und das methodische Vorgehen zur Herleitung des Mindestverdübelungsgrades sind auf andere Verbundmittel- und Querschnittstypen übertragbar.

scholarly journals Experimental Investigation of a Slip in High-Performance Steel-Concrete Small Box Girder with Different Combinations of Group Studs

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2781 ◽  
Author(s):  
Bishnu Gupt Gautam ◽  
Yiqiang Xiang ◽  
Xiaohui Liao ◽  
Zheng Qiu ◽  
Shuhai Guo
Keyword(s):  
Composite Structures ◽  
High Performance ◽  
Vital Role ◽  
Accelerated Bridge Construction ◽  
Continuous Beam ◽  
Box Girders ◽  
Test Beam ◽  
Simply Supported ◽  
Shear Connectors ◽  
Shear Connection

Due to the significant advantages of steel-concrete composite beams, they are widely used for accelerated bridge construction (ABC). However, there is still a lack of experimental research on the proper design of ABC, especially in the slip with a different group of shear connectors. As a component of steel-concrete composite structure, shear studs play a vital role in the performance of composite structures. This paper investigates the influence of group studs in simply supported and continuous box girders. To this end, three sets of simply supported steel-concrete composite small box girders and two continuous steel-concrete composite small box girders were made with different groups of shear studs, and the slip generated along the beams was recorded under different caseloads. The results were then compared with the proposed simplified equations. The results show that the slip value of the test beam is inversely proportional to the degree of shear connection. The slip of Simply Supported Prefabricated Beam-3 (SPB3) is 1.247 times more than Simply Supported Prefabricated Beam-1 (SPB1), and 2.023 times more than Simply Supported Prifabricated Beam-2 (SPB2). Also, the slip value of Experimental Continuous Beam-1 (ECB1) is 1.952 times more than Experimental Continuous Beam-2 (ECB2). The higher the degree of shear connection, the smaller the maximum slip value.

Study on Ultimate Bearing Capacity and Anti-Slip of the Stud

2011 ◽  
Vol 99-100 ◽  
pp. 166-169
Author(s):  
Yi Min Dai ◽  
Xu Guang Yan ◽  
Jing Chen ◽  
Xiang Jun Wang
Keyword(s):  
Bearing Capacity ◽  
Test Data ◽  
Composite Structure ◽  
Concrete Strength ◽  
Composite Beams ◽  
Ultimate Bearing Capacity ◽  
Shear Connector ◽  
Shear Connectors ◽  
Stud Shear Connector ◽  
Push Out

Based on the test data of twelve push-out specimens with different holes filling different materials,the paper compared and analyzed the capacity and the corresponding slip value of the stud shear connector. The results show that, as to the two different kinds of holes shape ,the strength of the stud shear connectors of square push-out specimens was huger than that of circular specimens with the same condition; the strength of stud shear connectors in steel-concrete composite structure was decided by the strength of concrete surrounding the shear in the holes, with increasing concrete strength, the strength of stud shear connectors improved greatly; The outputs of this study are very useful for further understanding of the characteristics of the stud,it is also expected that the results presented in this paper should be valuable for the design of the composite beams.

Experimental investigation of bamboo-concrete composite beams with threaded reinforcement connections

2021 ◽  
pp. 109963622110235
Author(s):  
Yang Wei ◽  
Si Chen ◽  
Junfeng Jiang ◽  
Mengqian Zhou ◽  
Kang Zhao
Keyword(s):  
Composite Structure ◽  
Shear Failure ◽  
Ductile Failure ◽  
Composite Beams ◽  
Experimental Investigations ◽  
Test Results ◽  
Cross Sectional ◽  
Shear Connection ◽  
Flexural Performance ◽  
Service State

A novel bamboo-concrete composite structure with threaded reinforcement connections is presented. Experimental investigations on the shear behavior of the connectors and the flexural performance of the bamboo-concrete composite beams were carried out. The results indicate that the load-slip behavior of the shear connection with threaded reinforcement exhibits good ductility and that its failure mode is ductile failure. The threaded reinforcement provides an efficient connection before the initial shear failure. The load-displacement curves of the bamboo-concrete composite beams are close to those of the full composite structure, and the midspan displacement is greatly reduced under the same load compared with that of the contrast bamboo beams. The loads PL/250 and PL/300, corresponding to the midspan deflections of L/250 and L/300 ( L is the span of the beams) of the composite beams, increase by averages of 3.36 times and 3.71 times, respectively, compared to those of the contrast bamboo beams. The load-bearing performance of the beams in the service state is greatly improved. Based on the equivalent cross-sectional stiffness calculated using the γ-method with a reduction of 0.80, the calculated results of the displacement are in good agreement with the test results.

scholarly journals Development of Shear Connections in Steelconcrete Composite Structures

2015 ◽  
Vol 15 (4) ◽  
pp. 23-32 ◽  
Author(s):  
Antoni Biegus ◽  
Wojciech Lorenc
Keyword(s):  
Composite Structures ◽  
Basic Research ◽  
Special Focus ◽  
Shear Connectors ◽  
Shear Connection ◽  
Shear Connections ◽  
Continuous Shear ◽  
Modelling Techniques ◽  
Year 2000 ◽  
Modern Solution

Abstract Different types of shear connectors and modelling techniques are presented. Basic research conducted or presented after year 2000 is taken into consideration, following the idea of concrete dowel implemented in the form of perfobond strip at the beginning of the 1980s by F. Leonhardt. The latest research in the field of continuous shear connectors applied in bridges is highlited with special focus at the composite dowel shear connection, as it seems to be the most modern solution being strongly introduced to the industry. Final shape of composite dowel shear connection is presented.

Sign in / Sign up

Export Citation Format

Share Document