Experimental Tests of the Load-Bearing Capacity of the Bottom Reinforcement Bars Passing over the Column

Abstract:

In the paper the results of laboratory tests performed on a simplified model of a slab-column connection were presented. The aim of investigations was to find out at which value of the load the destruction of such a connection occurs due to a rupture of the bars above the column. In respective models the column was situated axially or eccentrically with respect to span of bars. In each case the reinforcement passing above the column consisted of bars with a diameter of ø8 mm, ø12 mm or ø16 mm. The obtained results of laboratory tests and calculations permitted to determine the relations between the exerted load and the displacement of the column in time and also were compared with the guidelines contained in the standards CSA A23.3 and ACI 352R. Based on the results, the reduction of the load bearing capacity of the reinforcement bars due to bending was determined.

• Periodical: Applied Mechanics and Materials (Volume 837)
• Pages: 146-151
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.837.146
• Online since: June 2016
• Authors: Barbara Wieczorek*
• Keywords: Experimental Research, Progressive Collapse, Reinforced Concrete Structure, Slab-Column Connections, Structural Integrity Reinforcement

References

[1] CSA Standard A23. 3-04: Design of concrete structures, Canadian Standard Association, (2004).

[2] ACI 352. 1R-89: Recommendations for design of slab-column connections in monolithic reinforced concrete structures, American Concrete Institute, ACI-ASCE Committee 352, USA, 1988, 22 p.

DOI: 10.1061/40558(2001)69

[3] PN-EN 1992-1-1: 2004/AC: Eurocode 2, Design of concrete structures - Part 1-1: General rules and rules for buildings, European Standard, (2010).

DOI: 10.3403/03178016

[4] N.M. Hawkins, D. Mitchell, Progressive collapse of flat plate structures, Journal of the American Concrete Institute 76(7) (1979).

[5] G. Melo, P. Regan, Post-punching resistance of connections between flat slabs and interior columns, Magazine of Concrete Research 50(4) (1998).

DOI: 10.1680/macr.1998.50.4.319

[6] Y. Mirzaei, Post-punching behavior of reinforced concrete slabs, School of Architecture, Civil and Environmental Engineering, EPFL, Switzerland, (2010).

[7] J. Sagaseta, A. Muttoni, M. Fernandez Ruiz, L. Tassinari, Non-axis-symmetrical punching shear around internal columns of RC slabs without transverse reinforcement, Magazine of Concrete Research, Paper 1000098, UK (2011), 17 pp.

DOI: 10.1680/macr.10.00098

[8] B. Wieczorek, Influence of the location of the column on the load capacity of a slab-column connection for the inner column after punching, Procedia Engineering 57 (2013) 1251-1259.

DOI: 10.1016/j.proeng.2013.04.158

[9] M. Wieczorek, Influence of amount and arrangement of reinforcement on the mechanism of destruction of the corner part of a slab-column structure, Procedia Engineering 57 (2013) 1260-1268.

DOI: 10.1016/j.proeng.2013.04.159

[10] M. Wieczorek, Investigations concerning the corner part of the reinforced concrete structure in the emergency of removing the corner support, Procedia Engineering 65 (2013) 135-142.

DOI: 10.1016/j.proeng.2013.09.023

[11] M. Wieczorek, Concept of shell-beam model of slab-column connection based on analysis of the 3D model . Procedia Engineering 65 (2013) 158-165.

DOI: 10.1016/j.proeng.2013.09.026

[12] B. Wieczorek, Idea of a simplified model to determination of the load capacity of an inner slab-column connection after its punching, Procedia Engineering 65 (2013) 126-134.

DOI: 10.1016/j.proeng.2013.09.022

[13] B. Wieczorek, Load-bearing capacity of reinforcing bars in the zone of the slab-column connection determined experimentally and in the result of numerical calculations, Procedia Engineering 65 (2013) 149-157.

DOI: 10.1016/j.proeng.2013.09.025