effect of spiral spacing and concrete strength on behavior

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Effect of Spiral Spacing and Concrete Strength on Behavior ...

Hollow concrete columns (HCCs) are one of the preferred construction systems for bridge piers, piles, and poles because they require less material and have a high strength-to-weight ratio. While spiral spacing and concrete compressive strength are two critical design parameters that control HCC behavior, the deterioration of steel reinforcement ...

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Effect of spiral spacing and concrete strength on behavior ...

Hollow concrete columns (HCCs) are one of the preferred construction systems for bridge piers, piles, and poles because they require less material and have a high strength-to-weight ratio. While spiral spacing and concrete compressive strength are two critical design parameters that control HCC behavior, the deterioration of steel reinforcement is becoming an issue for HCCs.

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Effect of Spiral Spacing and Concrete Strength on Behavior ...

Effect of Spiral Spacing and Concrete Strength on Behavior of GFRP-Reinforced Hollow Concrete Columns

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Journal of Composites for Construction

1 EFFECT OF SPIRAL SPACING AND CONCRETE STRENGTH ON BEHAVIOR OF 2 GFRP-REINFORCED HOLLOW CONCRETE COLUMNS 3 Omar S. AlAjarmeh1, Allan C. Manalo2,*, Brahim Benmokrane3, Warna Karunasena4, and 4 Priyan Mendis5 5 6 Abstract 7 Hollow concrete columns (HCCs) are one of the preferred construction systems for bridge 8 piers, piles, and poles because they require less material and have a high strength ...

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Effect of spiral spacing and concrete strength on behavior ...

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Effect of spiral spacing on axial compressive behavior of ...

Spiral spacing effect on axial compressive behavior of reinforced concrete filled steel tube (RCFST) stub column is experimentally investigated in this paper. A total of twenty specimens including sixteen square RCFST columns and four benchmarked conventional square concrete filled steel tube (CFST) columns are fabricated and tested. Test variables include spiral spacing (spiral ratio) and ...

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Mechanical behavior of spiral stirrup reinforced concrete ...

Jan 01, 2021  Within the range of reinforcement ratios (0.44–2.90%) in this study, the strength of spiral stirrup can be fully utilized. In particular, the effect of spiral stirrup gradually manifests after the yield of the square steel tube under eccentric compression, and the smaller the spacing of spiral stirrup is, the better the deformation capacity ...

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Journal of Composites for Construction

1 EFFECT OF SPIRAL SPACING AND CONCRETE STRENGTH ON BEHAVIOR OF 2 GFRP-REINFORCED HOLLOW CONCRETE COLUMNS 3 Omar S. AlAjarmeh1, Allan C. Manalo2,*, Brahim Benmokrane3, Warna Karunasena4, and 4 Priyan Mendis5 5 6 Abstract 7 Hollow concrete columns (HCCs) are one of the preferred construction systems for bridge 8 piers, piles, and poles because they require less material and have a high strength ...

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Effect of Spiral Spacing and Concrete Strength on Behavior ...

Hollow concrete columns (HCCs) are one of the preferred construction systems for bridge piers, piles, and poles because they require less material and have a high strength-to-weight ratio. While spiral spacing and concrete compressive strength are two critical design parameters that control HCC behavior, the deterioration of steel reinforcement ...

Get price

Mechanical behavior of spiral stirrup reinforced concrete ...

Jan 01, 2021  Within the range of reinforcement ratios (0.44–2.90%) in this study, the strength of spiral stirrup can be fully utilized. In particular, the effect of spiral stirrup gradually manifests after the yield of the square steel tube under eccentric compression, and the smaller the spacing of spiral stirrup is, the better the deformation capacity ...

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STR-827: SHEAR STRENGTH OF CIRCULAR CONCRETE

spiral-reinforcement ratio (spiral spacing and size) on the shear strength and behavior of circular concrete beams. Each beam was simply supported over a 2,400 mm span and had a total length of 3,000 mm, an equivalent effective

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Stress-Strain Behavior of Steel Fiber-Reinforced Concrete ...

Apr 26, 2018  The compressive strength of concrete according to certain codes can be based on the compressive strength of unconfined plain standard concrete cylinders tests at the age of 28 days. In this paper, the standard concrete cylinders were spirally confined with steel bars and with/without hooked-end steel fibers. The influence of the use of hooked-end steel fiber in spirally confined concrete with ...

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Effect of Test Parameters on Behavior of Circular GFRP ...

steel bars based on the equivalent strength of 6 longitudinal steel bars used in the two counterpart specimens (S1 and S2). Group III, IV, and V specimens served to study the effect of lateral reinforcement parameters on axial capacity in terms of volumetric ratios, diameters, and spacing of spiral reinforcement. The specimens in

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Research on uniaxial compressive behavior of high‐strength ...

Sep 29, 2020  Transverse reinforcement and steel fibers had a combined effect on improving the post-peak behavior. Reducing the stirrup spacing or increasing the steel fibers volume content can better improve the axial compressive behavior of columns. A new

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Structural Behavior of GFRP-Reinforced Circular HFRC ...

Aug 31, 2020  The loading eccentricities significantly affect the axial strength of GFRP-reinforced concrete columns . A detailed study on the eccentrically loaded GFRP-RC circular columns indicated that the difference in the load-carrying capacity of columns reduced from 15.5% at low eccentricity to 2.3% at high eccentricity with a 40 mm and an 80 mm spiral ...

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10NCEE Anchorage, Alaska MONOTONIC AND CYCLIC

effect of SMA spirals pitch spacing in the behavior of SMA confined concrete. Second, the effect of applying SMA confinement to concrete under cyclic loading is then investigated experimentally through comparing it with that of concrete confined using conventional steel spirals with similar level of confining pressure and the same spiral spacing.

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(PDF) Compressive behavior of concrete confined by CFRP ...

Parameter ac is defined as the ratio compressive behavior of concrete cylinder column between the ultimate confinement pressure (flu ) and confined by both CFRP and TSR. The effects of main the compressive strength of unconfined concrete (fco0 ).

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Confinement Effect of Reinforced Concrete Columns with ...

Conventional spiral-type transverse reinforcement is effective at increasing the ductility and the maximum strength of reinforced concrete (RC) columns because it confines the inner concrete and the longitudinal reinforcement. However, when arranging crossties in a RC column with spirals, problems such as mutual interference with longitudinal reinforcement, overcrowding of reinforcement, and ...

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Flexural Strength and Ductility Analysis of Spirally ...

The compressive strength of spirally confined concrete is given as: f~=J: { 2.254-v I+ 7.94 ~-2~-1.254} (6) which assumes that the compressive strength of uncon­ fined concrete is given by the cylinder strength t:. The ef­ fective lateral confining pressure J,. due to the spiral in Eq. (6) is given by: (7)

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Bond Strength of FRP Rebar to Concrete: Effect of Concrete ...

available on the effect of concrete confinement of FRP rebar. Due to the limited availability of experi-mental data, no definite relationship can be estab-lished between transverse reinforcement and bond strength for FRP rebar. ACI 440.1R-06 proposed the following bond strength equation of FRP rebar to concrete (in SI units): embed l b d b d c ...

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‪Omar Saleh Alajarmeh‬ - ‪Google Scholar‬

Effect of spiral spacing and concrete strength on behavior of GFRP-reinforced hollow concrete columns OS AlAjarmeh, AC Manalo, B Benmokrane, W Karunasena, P Mendis Journal of Composites for Construction 24 (1), 04019054 , 2020

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Reinforced Concrete Columns Confined by Circular Spirals ...

Sep 01, 1993  Effects of different variables, such as amount and type of lateral steel, lateral steel spacing, and specimen size, on the behavior of columns were investigated. The relation between lateral pressure on concrete and concrete strength enhancement, and the variation of spiral steel stress and confinement effectiveness coefficient k with respect ...

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Effect of Test Parameters on Behavior of Circular GFRP ...

steel bars based on the equivalent strength of 6 longitudinal steel bars used in the two counterpart specimens (S1 and S2). Group III, IV, and V specimens served to study the effect of lateral reinforcement parameters on axial capacity in terms of volumetric ratios, diameters, and spacing of spiral reinforcement. The specimens in

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(PDF) Stress-Strain Behavior of High-Strength Concrete ...

Variables investigated in the experiment included the concrete com- Cusson and Paultre (1995) pressive strength, the spiral spacing, and the strain rate effect Cusson and Paultre7 have developed a stress-strain model (slow and fast).

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Flexural Strength and Ductility Analysis of Spirally ...

The compressive strength of spirally confined concrete is given as: f~=J: { 2.254-v I+ 7.94 ~-2~-1.254} (6) which assumes that the compressive strength of uncon­ fined concrete is given by the cylinder strength t:. The ef­ fective lateral confining pressure J,. due to the spiral in Eq. (6) is given by: (7)

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TORSIONAL EFFECTS ON SEISMIC PERFORMANCE OF

They found that the effect of degradation of concrete strength in the ... the spiral significantly affects the behavior of circular columns due to their winding ... spacing of 83 mm. This resulted in a transverse reinforcement ratio of 1.32% similar to circular columns. In order to

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Stress-Strain Behavior of Steel Fiber-Reinforced Concrete ...

Apr 26, 2018  The compressive strength of concrete according to certain codes can be based on the compressive strength of unconfined plain standard concrete cylinders tests at the age of 28 days. In this paper, the standard concrete cylinders were spirally confined with steel bars and with/without hooked-end steel fibers. The influence of the use of hooked-end steel fiber in spirally confined concrete with ...

Get price

Experimental Investigation of Fiber Reinforced Concrete Beams

Historically, much effort has been spent improving the behavior of concrete structures. Flexural, compressive, shear strength, ductility, and other properties have been the focus of many researchers who have tested concretes with added steel and other materials to improve the behavior of concrete. The concept of adding fibers to improve brittle

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Performance Assessment of the Post-Tensioned Anchorage ...

The compressive strength of concrete was 30 MPa, and all specimens showed large strain behavior in loading conditions. This was because they did not use spiral reinforcement. Usually, the post-tension method uses spiral reinforcement to give an effect of confinement to

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Improving the Torsional Capacity of Reinforced Concrete ...

Three different spacing were used (125, 150, and 200 mm). The stirrups were inclined at five angles (62°, 70°, 75°, 80°and 85°). The results showed that the shear capacity increased for specimens with continuous rectangular spiral in a range of 11-18 %, 1.5-17 %, and 1.5-30 % for spacing

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EFFECT OF SPACING OF SINGLE SWIMMER BARS ON THE

EFFECT OF SPACING OF SINGLE SWIMMER BARS ON THE SHEAR BEHAVIOR OF HIGH STRENGTH CONCRETE BEAMS Sreejith P S1, P Eapen Sakaria2 1Sreejith P S, P G Student, Dept. of Civil Engineering, Saintgits College of Engineering, Kerala, India 2 Prof. Eapen Sakaria, Professor Of P.G.Studies, Dept. of Civil Engineering, Saintgits College of Engineering, Kerala,

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Bond Strength of FRP Rebar to Concrete: Effect of Concrete ...

available on the effect of concrete confinement of FRP rebar. Due to the limited availability of experi-mental data, no definite relationship can be estab-lished between transverse reinforcement and bond strength for FRP rebar. ACI 440.1R-06 proposed the following bond strength equation of FRP rebar to concrete (in SI units): embed l b d b d c ...

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EffectofSpiralSpacingandConcreteStrengthonBehaviorofGFRP ...

Lateral expansion of the peri-meter at midheight was noted after concrete-cover spalling, Spiral spacing affects the load displacement, confined strength, and leading to final failure, as highlighted by the rupturing of the ductility behavior of HCCs reinforced with GFRP bars, as shown in longitudinal GFRP bars and massive damage to the ...

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Effect of chloride-induced corrosion on the bond behaviors ...

Jun 01, 2021  To investigate the stirrup effects on the bond behavior of steel strands and concrete, two different series concerning the stirrup arrangement were designed for each type of specimen, as shown in Fig. 1.Specifically, for one series, the specimens were reinforced with one stirrup circuit based on smooth bars, while no stirrup was reinforced in the specimens for the other series.

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