Confinement Of High Strength Concrete (Hsc) Columns

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(PDF) Confinement of high-strength concrete columns

High-strength concrete (HSC) with compressive strength of 8000 psi (55 MPa) or higher is commonly used in columns at present. However, very little is known about

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Confinement of High-Strength Concrete Columns

01/01/1994  High-strength concrete (HSC) with compressive strength of 8000 psi (55 Mpa) or higher is commonly used in columns at present. However, very little is known about its behavior under large inelastic deformations, particularly when subjected to severe earthquakes, and most building codes do not provide the required design guidelines. Results from four high-strength concrete specimens,

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Confinement of High Strength Concrete (HSC) Columns with ...

Confinement of High Strength Concrete (HSC) Columns with Fibre Reinforced Polymer Wraps Jagannathan Saravanan Kannan Suguna Pulipaka Narasimha Rao Raghunath Department of Structural Engineering Annamalai University,Annamalainagar-608002, India [email protected],[email protected] Abstract— This paper presents the results of an experimental study on high strength concrete columns

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(PDF) Confinement of high-strength concrete with welded ...

Increased ductility of columns made with high-strength concrete (HSC) can be accomplished through proper confinement of the concrete core. To determine the effectiveness of welded wire fabric as ...

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(PDF) COnfinement Reinforcement Design Considerations for ...

The current work deals with the experimental behavior of high-strength concrete (HSC) and ultrahigh-strength concrete (UHSC) column behavior. Realistically sized columns (305 X

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Top PDF Confinement of High Strength Concrete Columns with ...

Authors discussed the results indicate that more confinement is required in columns high strength concrete than in columns of low strength concrete to achieve the desired post-peak deformability and behaviour of high strength columns is characterized by the sudden spalling of concrete cover leading to a loss of axial capacity. The authors (Hadi, 2007; Hadi, 2003; Yong et al., 1998) conducted ...

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(PDF) High-strength concrete columns: A design guide

The results provided insight into the strength and deformability of circular high-strength concrete (HSC) columns and were used to generate design information for confinement of these columns

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High Strength Concrete Columns under Axial Compression ...

Addition of steel fibers to high strength concrete (HSC) improves its post-peak behavior and energy absorbing capability, which can be described well in term of toughness. This paper attempts to obtain both analytically and experimentally the efficiency of steel fibers in HSC columns with hybrid con High Strength Concrete Columns under Axial Compression Load: Hybrid Confinement Efficiency ...

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(PDF) CONFINEMENT REINFORCEMENT DESIGN

This paper presents results from a continuing research program that aims to study confinement of concrete by lateral reinforcement. The current work deals with the experimental behavior of high-strength concrete (HSC) and ultrahigh-strength concrete

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Nominal Curvature Design of Circular HSC Columns Confined ...

This article proposes new parameters for the practical design of circular high-strength concrete (HSC) columns confined with an innovative Steel Strapping Tensioning Technique (SSTT) using a nominal curvature approach. Previous experimental research has proven the effectiveness of the SSTT at providing active confinement and enhancing the ductility of HSC columns, but to date no practical ...

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(PDF) Eccentrically Loaded Externally Confined HSC Columns

The application of steel-straps confinement has been proven to be effective in increasing the strength and ductility of High-Strength Concrete (HSC) column comparable to Fiber-Reinforced Polymer.

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Uniaxial behaviour of confined high-strength concrete ...

25/05/2015  High-strength concrete (HSC) columns are usually provided with heavy confining steel within the potential plastic hinge region to restore flexural ductility. However, as the effectiveness of confining steel decreases with the concrete strength, the required confining steel content for high-strength concrete columns becomes very large, which causes steel congestion in the proximity of

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(PDF) Effect of eccentricity on SSTT-confined HSC columns ...

Assuming that these models are also valid for larger HSC column cross-sections, existing models for confined HSC cation also been extended to high-strength concrete (HSC) imply that confined HSC column will undergo substantial considering the pre-tensioned forced provided by SSTT can deformations. In case of eccentric loading, larger ultimate hor- significantly enhance the ductility of HSC

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Strengthening square reinforced concrete columns by ...

8 study uses high strength concrete (HSC) in the covers to increase the load carrying capacity of 9 columns. However, using HSC leads to different behaviours between the concrete core and the 10 segmental concrete covers. Also, HSC was found to achieve lower effective confinement than 11 normal strength concrete [5]. Therefore, this st udy ...

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Confinement of ultra-high-performance fiber reinforced ...

15/09/2017  1. Introduction. Extensive research has been carried in order to prevent brittle failure of high-strength concrete (HSC) and ultra-high-strength concrete (UHSC) columns for high-rise building applications , , , , , , , , .Providing transverse reinforcement to confine the core concrete is the most common solution to avoid brittle failures but it also results in steel congestion and cannot ...

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Confinement of High-Strength Concrete Columns Semantic ...

The paper presents results from 4 high strength concrete specimens, 3 nonprismatic and 1 prismatic, tested under constant axial load and cyclic lateral loads simulating earthquake forces, and comparison is made with similar specimens of normal strength concrete. Concrete strength varied between 4500 and 8500 psi. Relevant provisions of the ACI Building Code are evaluated in light of the test data.

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Top PDF Confinement of High Strength Concrete Columns with ...

Authors discussed the results indicate that more confinement is required in columns high strength concrete than in columns of low strength concrete to achieve the desired post-peak deformability and behaviour of high strength columns is characterized by the sudden spalling of concrete cover leading to a loss of axial capacity. The authors (Hadi, 2007; Hadi, 2003; Yong et al., 1998) conducted ...

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High Strength Concrete Columns under Axial Compression ...

Addition of steel fibers to high strength concrete (HSC) improves its post-peak behavior and energy absorbing capability, which can be described well in term of toughness. This paper attempts to obtain both analytically and experimentally the efficiency of steel fibers in HSC columns with hybrid con High Strength Concrete Columns under Axial Compression Load: Hybrid Confinement Efficiency ...

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Confinement effects on high strength concrete under axial ...

30/11/2014  For high strength concrete (HSC) it has been found that a brittle behavior occurs when a great amount of confinement is not provided. This paper, focused on HSC columns, will show the limits of some international standard indications on confinement when this is provided in order to achieve high values of resistance, strain and hence ductility in the concrete.

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Seismic Behavior of High-Strength Concrete Columns ...

06/12/2006  The use of high-strength concrete (HSC) in seismically active regions poses a major concern because of the brittle nature of material. The confinement requirements for HSC columns may be prohibitively stringent when ordinary grade transverse steel reinforcement is used. An alternative to conventional confinement reinforcement is the use of fiber-reinforced polymer (FRP) tubes in the

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Uniaxial behaviour of confined high-strength concrete ...

25/05/2015  High-strength concrete (HSC) columns are usually provided with heavy confining steel within the potential plastic hinge region to restore flexural ductility. However, as the effectiveness of confining steel decreases with the concrete strength, the required confining steel content for high-strength concrete columns becomes very large, which causes steel congestion in the proximity of

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Stress–strain model for high-strength concrete tied ...

Since the use of high-strength concrete (HSC) has become more commonplace in the construction industry, ... Razvi and Saatcioglu proposed another formula for the effective confinement stress for HSC tied columns: (7) f le = k 2 f lave k 2 = 0.15 b c s b c s l ≤ 1.0 where s l is the spacing between adjacent longitudinal bars. The effective stresses obtained from Eq. are clearly on the outer ...

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Experimental Investigation on Using Mesh as Confinement ...

It is well documented that reinforced high strength concrete (HSC) columns are subject to early cover spalling, which leads to strength reduction. The need of investigation on more economic confinement materials has arisen. In order to reduce early cover spalling, a new idea has been investigated in this study. This idea is about installing relatively cheap materials such as household fiber ...

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Confinement of ultra-high-performance fiber reinforced ...

15/09/2017  1. Introduction. Extensive research has been carried in order to prevent brittle failure of high-strength concrete (HSC) and ultra-high-strength concrete (UHSC) columns for high-rise building applications , , , , , , , , .Providing transverse reinforcement to confine the core concrete is the most common solution to avoid brittle failures but it also results in steel congestion and cannot ...

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Acoustic Emission Monitoring of High-Strength Concrete ...

One of the applications this method can contribute to is in high-strength concrete (HSC) columns. These elements have a great advantage in the lower stories of high-rise buildings. However, the premature failure of the concrete cover and the brittleness nature of the failure is of a concern for engineers. This paper presents a study on the AE monitoring of HSC columns subjected to

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