scholarly journals Plate with holes as shear connector in cold formed steel composite beams

2019 ◽  
Vol 12 (3) ◽  
pp. 509-517
Author(s):  
O. P. AGUIAR ◽  
R. B. CALDAS ◽  
F. C. RODRIGUES ◽  
H. N .BELLEI
Keyword(s):  
Concrete Slab ◽  
Composite Beams ◽  
Shear Connector ◽  
Reinforced Concrete Slab ◽  
Relative Slip ◽  
Floor Systems ◽  
Composite Section ◽  
Support Area ◽  
Steel Composite ◽  
Cold Formed Steel

Abstract In search of an improved compatibility between cold-formed steel profiles and precast floor systems, this study proposes an alternative shear connector for cold-formed steel-concrete composite beams. This connector consists of a steel plate with holes placed longitudinally in the middle of the upper flange of the steel profile, aiming to maximize the support area for precast slabs during the assembly. The proposed solution was experimentally tested on I-beams under bending, composed by two cold-formed steel channels, connected to a reinforced concrete slab by the shear connector. The relative slip between the steel profile and concrete, vertical deflection of the beam, and strains at several locations of the composite section were measured. The results show that the proposed connector assures shear transfer at the interface of the composite section components and shows strength of the same magnitude as other commonly used connectors.

New composite beams having cold-formed steel joists and concrete slab

2014 ◽  
Vol 71 ◽  
pp. 187-200 ◽  
Author(s):  
Cheng-Tzu Thomas Hsu ◽  
Sun Punurai ◽  
Wonsiri Punurai ◽  
Yazdan Majdi
Keyword(s):  
Concrete Slab ◽  
Composite Beams ◽  
Cold Formed Steel

scholarly journals Strengthening of Composite Steel-Concrete Beams Openings by Adopting Different Reinforcement Methods

2019 ◽  
pp. 1-17
Author(s):  
Mohamed H. Makhlouf ◽  
Hala M. Refat
Keyword(s):  
Numerical Study ◽  
Concrete Slab ◽  
Low Cost ◽  
Composite Beams ◽  
Experimental Program ◽  
Bottom Surface ◽  
Steel Beam ◽  
Web Openings ◽  
Line Load ◽  
Steel Composite

This paper presents an experimental and numerical study carried out to investigate the flexural and shear behavior of concrete-steel composite beams with circular web openings strengthened using two different techniques around openings. The experimental program conducted on nine simply supported beams which were constructed with different variables. One steel beam and eight concrete-steel composite beams were experimentally tested. The tested beams are of 1500 mm length and BFI cross section of steel beam but composite beams were BFI steel section connected with concrete slab had 300 mm width and 70 mm depth, while this connection is done by headed stud shear connector. The tested specimens subjected to positive bending were loaded by one or two line load across the width of the concrete slab. The main parameters were the type of beams, web openings effect, location of web openings, strengthening techniques around openings externally CFRP strips and vertical steel links using steel plates placed on the top and bottom surface of beams anchored with fine threads, and number of CFRP strips layers. The effect of these parameters on the failure of modes, ultimate load, first cracking load and deflection were investigated. Moreover, a finite element models were developed by ANSYS (version 14) to simulate all the tested specimens, experimental test results were compared with FE results obtained. The experimental results showed that both strengthening systems applied in this research were remarkably increased the beam strength, and the capacity retrieve of beams without openings. This study approved that steel links technique gave more prominent simplicity of use and low cost. FEM models were in good agreement with the corresponding experimental ones. However, the calculated ultimate loads were slightly higher than the experimental ultimate loads up to 10%.

Cold-formed steel in composite bridge construction

1978 ◽  
Vol 5 (2) ◽  
pp. 164-173
Author(s):  
John B. Kennedy ◽  
Murty K. S. Madugula ◽  
Robert G. Keen ◽  
C. Fung
Keyword(s):  
Concrete Slab ◽  
Field Performance ◽  
Design Parameters ◽  
Box Girders ◽  
Reinforced Concrete Slab ◽  
Shear Connectors ◽  
Laboratory Test Results ◽  
Bridge Superstructure ◽  
Cold Formed Steel ◽  
Ultimate Load Carrying Capacity

Laboratory tests were conducted on a full scale prototype of a segment of a bridge superstructure of cold-formed steel box girders in composite construction with a reinforced concrete slab. The results indicate that such a superstructure has adequate ultimate load carrying capacity, is effective in distributing concentrated loads laterally, and that the specially-formed shear connectors (lugs) are quite successful in shear transfer; furthermore, the design parameters can be predicted by means of ordinary analytical methods. Based on the field performance of a similar superstructure for a bridge over the Slate River and on the laboratory test results, refinements in the design that should lead to further economies for this type of construction are suggested.

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.  

Behaviour of perfobond rib shear connectors: push-out tests

1992 ◽  
Vol 19 (1) ◽  
pp. 1-10 ◽  
Author(s):  
M. R. Veldanda ◽  
M. U. Hosain
Keyword(s):  
Concrete Slab ◽  
Composite Beams ◽  
Steel Beams ◽  
Shear Connector ◽  
Reinforcing Bars ◽  
Longitudinal Splitting ◽  
Shear Connectors ◽  
Beam Shear ◽  
Headed Stud ◽  
Push Out

This paper summarizes the results of tests performed on 48 push-out specimens to investigate the feasibility of using perfobond rib type shear connectors in composite beams with ribbed metal decks placed parallel to the steel beams. The perfobond rib shear connector is a flat steel plate containing a number of holes. The results indicate that perfobond rib connectors can be effectively used in composite beams with ribbed metal decks placed parallel to the steel beams. An appreciable improvement in performance was observed in test specimens when additional reinforcing bars were passed through the perfobond rib holes. Shank shear was the principal mode of failure in specimens with headed studs. In specimens with perfobond rib, failure was triggered by the longitudinal splitting of the concrete slab, followed by the crushing of concrete in front of the perfobond rib. Key words: composite beam, shear connector, perfobond rib, headed stud, push-out test, metal deck.

The flexural behavior of cold-formed steel composite beams

2020 ◽  
Vol 218 ◽  
pp. 110819
Author(s):  
Yu Shi ◽  
Kaidi Yang ◽  
Yu Guan ◽  
Xinmei Yao ◽  
Lei Xu ◽  
...  
Keyword(s):  
Composite Beams ◽  
Flexural Behavior ◽  
Steel Composite ◽  
Cold Formed Steel
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