Behavior of CSC-Type Shear Connectors under Pry-Out Shear Test: Analytical Study

Author:

Hurtado Xavier Fernando1,Molina Maritzabel1

Affiliation:

1. Universidad Nacional de Colombia

Abstract

The use of cold-formed steel (CFS) shapes in steel-concrete composite sections has increased over the past 20 years in the construction industry worldwide. This system has constructive advantages such as high load-bearing capacity, high stiffness and ductility, ease of transportation and assembly, and full usage of the capacity of the materials. Additionally, CFS sections are considered a sustainable alternative in construction.The capacity of the system depends on the effectiveness of shear connectors during the transfer of stress between materials. Currently, the push-out experimental test follows a standardized procedure to evaluate the capacity of shear connectors in composite sections, but CFS shapes have demonstrated premature failures by local buckling, thus questioning the applicability of the experimental test for such configurations.In this research, the capacity of the proposed confined shear connectors (CSC) is evaluated in composite systems, through the alternative pry-out test methodology. From numerical models, the effects of the steel shape thickness, the thickness of concrete slabs, the compressive strength of concrete and the separation between connectors in composite systems are studied. The analysis concluded that, under this test methodology, the separation between connectors does not represent statistically significant changes in the final capacity of the composite system.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference23 articles.

1. S.O. Bamaga, M.M. Tahir, & C.S. Tan, Push tests on innovative shear connector for composite beam with cold-formed steel section, in: International Specialty Conference on Cold-Formed Steel Structures, Scholars' Mine, USA Missouri University of Science and Technology, St. Louis, (2012).

2. T.M. Alhajri, M.M. Tahir, M. Azimi, J. Mirza, M.M. Lawan, K.K. Alenezi, & M.B. Ragaee, Behavior of pre-cast u-shaped composite beam integrating cold-formed steel with ferro-cement slab, Thin-Walled Structures 102 (2016) 18-29.

3. J.M. Irvwan, A.H. Hanizah, & I. Azmi, Test of shear transfer enhancement in symmetric cold-formed steel concrete composite beams, J. Const. Steel Res. 65 (2009) 2087-2098.

4. M.M. Lawan, M.M. Tahir, S.P. Ngian, & A. Sulaiman, Structural performance of cold-formed steel section in composite structures: a review. Jurnal Teknologi 74 (4) (2015) 165-175.

5. ANSI/AISC 360-16: Specification for Structural Steel Buildings, American Institute of Steel Construction, Chicago, (2016).

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