Experimental Study on Performance of Fiber Concrete-filled Tube Columns under Axial Loading

Abstract

There have been great developments in the area of civil engineering in the recent few decades and among these, construction and material innovation are quite prominent. Steel-concrete composite construction has emerged as one of the fastest methods of construction. Even though considerable research efforts on conventional reinforced concrete columns have been executed prior to now, concrete filled steel tube (CFST) composite columns however have received limited attention. This work aims to study the experimental behavior of steel tubular specimens. Plastic and steel specimens are considered with circular and square sections filled with the concrete with the steel fiber and as well, plain concrete. Four parameters are considered in this study which are sectional designs (circular and square), tube thickness (2 and 5 mm), tube material (plastic and steel) and content of steel fiber (0 and 5%). Ten concrete filled steel tubular columns were cast and tested. Two circular columns were made from plastic and the other made from steel. The main purpose of this work are study the effect of steel fiber and cross section on the ultimate load capacity of columns. It was discovered the utilization of steel fiber reinforced concrete filled steel tubular columns have comparatively substantial stiffness in comparison with plain concrete filled columns.

Punching Shear Characterization of Steel Fiber-Reinforced Concrete Flat Slabs

“…Steel fibers fill in shear cracks in concrete, which improves the material's ability to soften under tension and, as a result, the overall deformational influence. Steel fibers, based on fiber type and characteristics, may also contribute significantly to punching resistance [17][18]. The current slab-column connection code provisions, such as ACI 318-11 [19], Fib Model Code 2010 [20,21], and JSCE 2007 [22], were developed for normal concrete structures.…”

Experimental Study on Compressive Behavior of Concrete-filled Double-skin Circular Tubes with Active Confinement

“…The steel tube of concrete-filled (CFST) columns has *Corresponding Author Institutional Email: m-naghi@nit.ac.ir (M. Naghipour) become popular in constructing tall buildings amongst these measures recently. One of the reasons is that CFST columns performance is superior to columns of ordinary RC under torsion [12,13], under uni-axial load [14][15][16][17][18], and under flexure [19][20][21], based on experimental and theoretical research. Several examples of composite structures with CFST columns in circular or square forms, as external or internal structural members, are built.…”

Axial Compression Behaviour Analysis of Insulated Concrete Form (ICF) Wall Panel with Fibre Cement Board

“…Construction of commercial, industrial and residential structures was increased due to the rapid population growth. Therefore, the new technique in the construction industry got more demand to improve the time and cost effectively, flexible to construct and disaster resistant, serve the purpose and so on [1,2]. One of the successful methods is to use the locally available building material was boosted by the expansion of industries.…”