Push-out Test of Profiled Metal Decking Slabs with  Cold-formed Steel Beams and Rebar Shear Connector

Achmad Abraham S.  ARMO; Anis  SAGGAFF; Mahmood Bin Md.  TAHIR

doi:10.48048/wjst.2021.19825

Authors

Achmad Abraham S. ARMO Faculty of Engineering, Universitas Sriwijaya, Inderalaya, Indonesia
Anis SAGGAFF Faculty of Engineering, Universitas Sriwijaya, Inderalaya, Indonesia
Mahmood Bin Md. TAHIR Institute for Smart Infrastructure and Innovative Construction, Faculty of Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia

DOI:

https://doi.org/10.48048/wjst.2021.19825

Keywords:

Cold-formed steel, Partially encased, Push-out test, Shear connector, Shear capacity

Abstract

New methods to provide shear strength on the cold-formed steel (CFS) lipped c-channel section composite beam encased with concrete partially is proposed using rebars embedded in concrete. The development of research on the CFS composite beams technology with partial encasement shows that the section of the composite beam encased with concrete partially can provide ductile flexural action for the composite beam. The application of profiled metal decking slabs in the composite beam is becoming increasingly popular compared to solid slabs. However, it has a detrimental effect on the structural behavior of a composite beam. This research is aimed primarily at presenting the behavior of the rebar shear connector to evaluated ductility, shear capacity, and modes of failure. Two samples using a rebar 12 mm in diameter in the profiled metal decking slabs and solid slabs were tested using the standard push-out test till failure. For the composite beam design, the proposed shear connector embedded in the slab concrete and the CFS encased with concrete partially used the test results’ shear capacity, greater than the values as proposed by section 3.1, BS 5950. Due to rebars shear-off, the solid slab specimen failed with the highest load of 489.6 kN while the Profiled Metal Decking Slab specimen failed due to the formation of the cracks on the PMDS at 421.1 KN ultimate loading.

HIGHLIGHTS

A new system of the rebar shear connectors for the Cold-Formed Steel (CFS) composite beam partially encased in concrete have been developed
The main purpose of push-out testing is to investigate the shear capacity and ductility of the proposed shear connector failure modes and load-slip connections
The shear capacity of the test results is greater than the values as indicated by BS 5950 Part 3.1
The proposed rebars as a shear connector for partly embedded CFS can be used in the construction

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References

WW Yu, RA LaBoube and H Chen. Cold-formed steel design. John Wiley & Sons, New Jersey, 2010.

MM Tahir, TC Siang and SP Ngian. Typical tests on cold-formed steel structures. In: Proceedings of the Asia-Pacific Structural Engineering and Construction Conference, Kuala Lumper, Malaysia. 2006, p. 5-6.

SD Nardin and ALHCE Debs. Study of partially encased composite beams with innovative position of stud bolts. J. Construct. Steel Res. 2009; 65, 342-50.

V Kvocák and L Drab. Partially-encased composite thin-walled steel beams. Proc. Eng. 2012; 40, 91-5.

S Ahmad, A Masri and ZA Saleh. Analytical and experimental investigation on the flexural behavior of partially encased composite beams. Alexandria Eng. J. 2018; 57, 1693-712.

AAS Armo, A Saggaff, MM Tahir, SP Ngian, AS Musab and NA Salih. Behaviour of rebar shear connector in a push test for composite beam with cold-formed steel section. IOP Conf. Ser. Mater. Sci. Eng. 2019; 620, 012037.

Khadavi, MM Tahir, SP Ngian, A Sulaiman and A Bakri. Economic aspects of cold formed steel section designed as composite beam. Adv. Sci. Lett. 2018; 24, 4318-21.

Khadavi, MM Tahir, MNA Salih, SAA Achmad and PN Shek. Behaviour of composite beam arranged as boxed-section with c-channel of cold-formed steel of lipped section. IOP Conf. Ser. Mater. Sci. Eng. 2020; 849, 012073.

Khadavi and MM Tahir. Prediction on flexural strength of encased composite beam with cold-formed steel section. In: Proceedings of the 3rd International Conference on Construction and Building Engineering, Palembang, Indonesia, 2017.

MNA Salih, MM Tahir, S Mohammad, Y Ahmad, A Sulaiman, PN Shek, A Abraham, M Firdaus, KM Aminuddin and Khadavi. Experimental study on flexural behaviour of partially encased cold-formed steel composite beams using rebar as shear connector. IOP Conf. Ser. Mater. Sci. Eng. 2019; 513, 012038.

MNA Salih, MMd Tahir, S Mohammad and Y Ahmad. Behavior of boxed cold-formed steel as composite beam with rebar as shear connector. In: Proceedings of the 2nd GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt. 2019.

MNA Salih , MMd Tahir, S Mohammad, Y Ahmad, PN Shek, A Abraham, M Firdaus and Khadavi. Bending experiment on a novel configuration of composite system using rebar as shear connectors with partially encased cold-formed steel built-up beams. Mater. Today Proc. 2021; 39, 999-1005.

BS EN1994-1-1. Eurocode 4: Design of composite steel and concrete structures - part 1-1: General rules and rules for buildings, British Standard Institution, London, 2004.

BS 5950-3.1. Structural use of Steelwork in building - Part 3: Design in composite construction - Section 3.1 Code of practice for design of simple and continuous composite beams, British Standard Institution, London, 1990.

SO Bamaga, MM Tahir, CS Tan, PN Shek and R Aghlara. Push-out tests on three innovative shear connectors for composite cold-formed steel concrete beams. Construct. Build. Mater. 2019; 223, 288-98.

MM Lawan, MM Tahir, J Mirza and A Saggaff. Performance of varying bolted shear connectors in cold-formed steel composite beam. Architectural Engineering and New Materials, Malaysia, 2015, p. 58-67.

MM Tahir, MM Lawan, A Saggaff and J Mirza. Influence of shear connector size on ultimate strength in composite construction with cold-formed steel channel lipped section. Rev. Ind. Eng. Lett. 2016; 3, 1-10.

A Saggaff, T Alhajri, MM Tahir, K Alenezi, CS Tan, A Sulaiman, MM Lawan and M Ragaee. Experimental and analytical study of various shear connectors used for cold-formed steel-ferrocement composite beam. Appl. Mech. Mater. 2015; 754-755, 315-9.

A Saggaff, MM Tahir, M Azimi and MM Lawan. Impact of bolted shear connector spacing in composite beam incorporating cold-formed steel of channel lipped section. Rev. Ind. Eng. Lett. 2016; 3, 441-5.