Efficiency of Steel Fiber on Carrying Capacity of Short Square Columns

Abstract

An experimental investigation is carried out to find the beneficial effect of adding steel fiber to reinforced concrete square columns. Hooked end steel fiber type is used in this investigation. The aspect ratio is 60 and the percentages of the steel fiber that added to the concrete are 0.5%, 1.0% and 1.5%. The experimental work consists of fabricated twenty columns to observe the effect of steel fibers on the axial and bending moment capacity. The specimens are classified into five groups according to the applied load on it. Each of these groups is consisted of four columns having different steel fiber ratios (0, 0.5, 1.0 and 1.5) %. The columns are tested under concentric, eccentric with variable eccentricities and two-point loading. All tested columns in a one group having the same dimensions, same interior reinforcement and were tested under one applying–load and they have a square cross-section with a dimension of (100 × 100) mm. Specimens with steel fiber results are compared with the control specimen of their own (columns mad of plain concrete). The results showed that increasing steel fiber ratio is caused an increasing in the first cracking load and an increase in the ultimate load for all tested columns.

Behavior of RC columns incorporating with steel and recycled plastic fibers under eccentric load: An experimental work

“…But when many variables were similar between the current study and Hadier et al, 64 the results were in agreement. Increase in the P u of present columns (P S1 , P S2 , and P S3 ) and columns of Reference 64; CO‐7‐E = 60, CO‐12‐E = 60, and CO‐17‐E = 60 is very close. From the above it is clear that the role of fiber in improving the capacity of the columns is exacerbated as the concrete grade decreased.…”

“…Almost all of these results were reached in. 64 Experiments proved that the ultimate axial strength of centrally loaded fibrous column was higher than that of regular concrete column. Steel fibers, which resist the spread of cracks in concrete, were responsible for this improvement in strength.…”

“…Steel fibers, which resist the spread of cracks in concrete, were responsible for this improvement in strength. 64 Despite the fact that the load carrying capability of the examined specimen reduced due to eccentricity, steel fibers had a role in the ultimate axial strength. The applied load is plotted against the transverse/ vertical reinforcement strains curves of the columns P 0 and P 0* in Figure 8.…”

Reuse of Industrial Metal Wastes as Partial Replacement of Aggregates in Mortar Production

“…The reason for the improvement in flexural behavior through the presence of fibers is bridging in crack zone and preventing crack propagation [31,32]. Improved properties such as increased load carrying capacity, energy absorption and toughness were due to the increased energy demand for propagation of the crack thanks to the bridging effect of fibers [33,34]. Today, although various fiber types are produced according to material type, size and shape, costs of these fibers increase the economic burden of construction sector [35].…”

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

“…Abdulsattar and Al-Baghdadi [10] presented an experimental program for strengthening columns against axial loads. Alkufi and Al-Sherrawi [11] investigated an experimental program to find the beneficialeeffect of adding steel fiber to reinforcedcconcrete square columns. The resultssshowed that increasing steellfiber ratio is caused aniincreasing in the first crackinglload and an increase in the ultimatelload for all tested columns .…”