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

Finite Element Modelling of Innovative Precast Cold-Formed Steel Ferrocement as Composite Beam

2015 ◽  
Vol 752-753 ◽  
pp. 539-543 ◽  
Author(s):  
Anis Saggaff ◽  
Talal Alhajri ◽  
M. Ismail ◽  
Khaled Alenezi ◽  
Mohamad Ragae
Keyword(s):  
Finite Element ◽  
Composite Beam ◽  
Finite Element Modelling ◽  
Close Agreement ◽  
Concrete Slab ◽  
Experimental Tests ◽  
Composite Beams ◽  
Element Modelling ◽  
Cold Formed Steel ◽  
Steel Section

This paper describes Finite Element Modeling (FEM) of a composite beam comprised of cold formed steel section and concrete slab designed as ferrocement. Software (ANSYS, version 11) was adopted to carry out the modeling of the proposed composite beam. Experimental tests were also been carried out for three simple supported composite beams. The proposed innovative precast composite beam specimens of cold-formed steel lipped channel sections (CFS) connected with ferrocement slab were tested till failure, under two point loads positioned atquarter length of the span from support. The results showed that close agreement was observed between the FEM and experimental results for ultimate loads and load-deflection responses.

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.

Towards Light-Weight Composite Construction: Innovative Shear Connector for Composite Beams

2013 ◽  
Vol 351-352 ◽  
pp. 427-433 ◽  
Author(s):  
S.O. Bamaga ◽  
M.Md. Tahir
Keyword(s):  
Composite Beam ◽  
Concrete Slab ◽  
Low Cost ◽  
Construction Materials ◽  
Composite Beams ◽  
Shear Connectors ◽  
Steel Sections ◽  
Speed Up ◽  
Cold Formed Steel ◽  
Steel Section

Introducing low cost housing is one of the challenges face civil engineers now-days. Using lightweight construction materials i.e. cold formed steel sections is an alternate solution to overcome the challenge. In this study, a lightweight composite beam was introduced. It consists of cold formed steel section and profiled concrete slab. Experimental push tests were conducted to investigate the ductility and strength capacities of new and innovative shear connectors. The shear connectors were easy to form and give advantages to speed up the fabrication process of the proposed composite beam. The shear connectors showed large deformation and strength capacities. It is concluded that the proposed shear connectors could be used for lightweight composite beams.

scholarly journals Longitudinal shear capacity of the slabs of composite beams

1976 ◽  
Vol 3 (4) ◽  
pp. 514-522 ◽  
Author(s):  
M. N. El-Ghazzi ◽  
H. Robinson ◽  
I. A. S. Elkholy
Keyword(s):  
Composite Beam ◽  
Shear Failure ◽  
Concrete Slab ◽  
Compressive Force ◽  
Longitudinal Shear ◽  
Composite Beams ◽  
Shear Capacity ◽  
Slab Width ◽  
Two Parameters ◽  
Concrete Elements

The longitudinal shear failure of the slab of composite beams is constrained to occur at a predetermined shear surface. A method for calculating the longitudinal shear capacity of the slab of simply-supported steel–concrete composite beams is presented. The method is based on analyzing the stresses at failure of the concrete elements located at the slab shear surface.A design chart based on estimating the transverse normal stress required within the concrete slab to achieve the full ultimate flexural capacity of the composite beam is proposed. Alternatively, using elastic–plastic stress distribution across the concrete slab, the longitudinal compressive force due to bending and hence the applied moment can be predicted for any longitudinal shear capacity of the slab. The proposed design and analysis when compared to previous tests and analysis showed good agreement.The slab width and the shear span of the composite beam are found to be two important parameters which cannot be neglected when estimating the longitudinal shear capacity of the slab. These two parameters have been neglected in the empirical solutions previously adopted.

scholarly journals Theoretical and Experimental Studies of Timber Composite Beams Reinforced by Cold Formed Steel Sheets

2015 ◽  
Vol 5 (3) ◽  
pp. 50-63 ◽  
Author(s):  
Vilma França Monteiro ◽  
Edgar Bacarji ◽  
Orlando Ferreira Gomes ◽  
Francisco Antonio Rocco Lahr ◽  
André Luis Christoforo
Keyword(s):  
Experimental Studies ◽  
Composite Beams ◽  
Steel Sheets ◽  
Cold Formed Steel

Flexural behavior of cold-formed steel concrete composite beams

2013 ◽  
Vol 14 (2) ◽  
pp. 105-120 ◽  
Author(s):  
T. Valsa Ipe ◽  
H. Sharada Bai ◽  
K. Manjula Vani ◽  
Merchant Mohd Zafar Iqbal
Keyword(s):  
Composite Beams ◽  
Flexural Behavior ◽  
Cold Formed Steel

Analyses and tests to determine the effective widths of composite beams in unbraced multistorey frames

1986 ◽  
Vol 13 (1) ◽  
pp. 66-75 ◽  
Author(s):  
E. H. Fahmy ◽  
Hugh Robinson
Keyword(s):  
Concrete Slab ◽  
Concrete Strength ◽  
Composite Beams ◽  
Steel Frame ◽  
Slab Width ◽  
Lateral Forces ◽  
Measured Strain ◽  
Ultimate Moment ◽  
Strength And Stiffness ◽  
Good Agreement

This paper concerns the analysis and testing of 10 cantilever composite beams incorporating ribbed metal deck, representing the positive moment beam–column connections in an unbraced steel frame with composite floor beams. The positive moment beam–column connections arise from lateral forces on the unbraced frame. The effective widths of the slabs for strength and stiffness calculations have been determined from analysis. Agreement between the calculated strain distributions across the concrete slab width and the corresponding measured strain distributions was attained. Use of the calculated effective widths of the slab for strength together with a concrete strength of [Formula: see text] gave good agreement with the measured positive ultimate moment capacities of the cantilever composite beams subjected to upward end test loads.

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