ductility improvement of highstrength concrete columns

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Ductility Improvement of High-Strength Concrete

Ductility Improvement of High-Strength Concrete Columns with Lateral Confinement by H. Muguruma and F. Watanabe §;ynopsis : The object of this study is to investigate the possi­ bility of improving ductility of high-strength concrete columns with the lateral reinforcement. Eight column specimens confined

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Ductility Improvement of High-Strength Concrete

1990-11-1  The object of this study is to investigate the possibility of improving ductility of high-strength concrete columns with the lateral reinforcement. Eight column specimens confined by lateral reinforcements having 328.4 and 792.3 MPa in yield strength were tested under reversed cyclic lateral loads with constant axial compressive load levels from 0.254 to 0.629.

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Ductility Improvement of High-Strength Concrete

2008-6-1  Title: Ductility Improvement of High-Strength Concrete Columns with Lateral Confinement. Author(s): Muguruma, H., and Watanabe, F. Publication: 318Reference. Volume: 21. Issue: 10. Appears on pages(s): pp. 47-60. Keywords: Date: 6/1/2008. Abstract:

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STRENGTH AND DUCTILITY OF HIGH-STRENGTH

2020-5-13  1 STRENGTH AND DUCTILITY OF HIGH-STRENGTH CONCRETE COLUMNS REINFORCED WITH HIGH-STRENGTH STEEL Mohsen K. Khalajestani 1, Ahsan Parvez , Stephen J. Foster 1, Hamid Valipour and Graeme McGregor2 1School of Civil and Environmental Engineering, UNSW Sydney, Australia 2Liberty Steel, Australia Abstract: The demand for high-strength reinforcing

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Flexural ductility of high-strength concrete columns

2008-9-25  It can be seen from Fig. 7a that at a relatively low axial stress level of P/A g = 10 MPa, the ductility factor μ increases as the concrete strength f co increases while at a higher axial stress level of P/A g ≥ 20 MPa, the ductility factor μ changes only slightly as the concrete strength f co increases. Hence, at the same axial stress level, the use of a higher strength concrete has basically no adverse effect on the flexural ductility.

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Ductility Design of High-Strength Concrete Beams

2016-11-7  High-strength concrete (HSC) is increasingly used for the construction of tall buildings and long span bridges. However, most engineers just focus on how to better utilize the strength potential of HSC and little attention is paid to ensure that the HSC structures would have sufficient ductility.

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Strength and Ductility of High-Strength Concrete

Strength and Ductility of High-Strength Concrete Columns Confined with High-Strength Steel Ties . Ahsan Parvez1, Stephen J. Foster2, Hamid Valipour3 and Graeme McGregor4 1Research Associate ...

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Flexural ductility design of high‐strength concrete

In the seismic design of a structure, it is necessary to provide not only sufficient strength, but also a minimum level of flexural ductility for reinforced concrete (RC) columns. Eurocode EN1998‐1 directly...

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Critical factors in displacement ductility assessment of ...

2017-11-23  Displacement ductility of HSC columns was evaluated in terms of their concrete and reinforcement strengths, bar arrangement, volumetric ratio of transverse reinforcement, and axial loading. The results indicatedthattheconfinementrequirementsanddisplacement ductility in HSC columns are more sensitive than those in normal strength concrete columns.

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Design of High-Strength Concrete Columns for

2003-5-22  Strength and ductility of concrete are inversely proportional. Therefore, high- strength concrete columns exhibit brittle characteristics, developing sudden and explosive failures under concentric compression. Therefore, the design of high-strength concrete columns becomes a challenge, especially for seismically active regions.

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STRENGTH AND DUCTILITY OF HIGH-STRENGTH

2020-5-13  1 STRENGTH AND DUCTILITY OF HIGH-STRENGTH CONCRETE COLUMNS REINFORCED WITH HIGH-STRENGTH STEEL Mohsen K. Khalajestani 1, Ahsan Parvez , Stephen J. Foster 1, Hamid Valipour and Graeme McGregor2 1School of Civil and Environmental Engineering, UNSW Sydney, Australia 2Liberty Steel, Australia Abstract: The demand for high-strength reinforcing

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STRENGTH AND DUCTILITY OF HIGH-STRENGTH

2020-2-20  strength and ductility of high-strength concrete columns confined with high-strength steel Please register to access this resource It only takes a moment to register and get access instantly.

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Strength and Ductility of High-Strength Concrete

needed in HSC columns to maintain a similar level of ductility to that of normal strength concrete (1,3- 6). This requirement may be met by either increasing the volumetric ratio of confinement ...

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Strength and Ductility of High-Strength Concrete

Strength and Ductility of High-Strength Concrete Columns Confined with High-Strength Steel Ties . Ahsan Parvez1, Stephen J. Foster2, Hamid Valipour3 and Graeme McGregor4 1Research Associate ...

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Ductility Design of High-Strength Concrete Beams

2018-3-2  High-strength concrete (HSC) is increasingly used for the construction of tall buildings and long span bridges. However, most engineers just focus on how to better utilize the strength potential of HSC and little attention is paid to ensure that the HSC structures would have sufficient ductility.

Get price

Flexural ductility of high-strength concrete columns

The use of high-strength concrete (HSC) instead of normal-strength concrete (NSC) in columns has the advantage of allowing the column size to be reduced and is thus becoming popular. However, since HSC is more brittle than NSC, its use could result in undesirable brittle failure. To evaluate the ductility of columns, nonlinear moment–curvature analysis taking into account the stress-path ...

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Strength and Ductility Simulation of High-Strength ...

The strength statistics of 48 reinforced concrete columns representing normal-, high-, and very-high-strength are evaluated. The effects of the amount of confining steel, amount of longitudinal steel, and slenderness ratio are examined. Finally, ductility statistics at three different axial load levels are obtained.

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Flexural ductility design of high‐strength concrete

In the seismic design of a structure, it is necessary to provide not only sufficient strength, but also a minimum level of flexural ductility for reinforced concrete (RC) columns. Eurocode EN1998‐1 directly...

Get price

Flexural ductility design of confined high-strength ...

2016-1-1  The results revealed that the flexural ductility of HSC columns is highly dependent on normalised axial force and neutral depth axis of the columns. It was found that the flexural ductility design of SSTT-confined HSC columns can be simplified by controlling the

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Ductility and stiffness of slender confined reinforced ...

2019-11-1  Ductility and stiffness of slender confined reinforced high-strength concrete columns under monotonic axial load ... Table 3 also summarises the percentage of the improvement in ductility for different columns relative to their control specimen. Obviously, the confinement exhibited higher gain in ductility for columns with λ = 16. For short ...

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STRENGTH AND DUCTILITY OF HIGH-STRENGTH

2020-2-20  strength and ductility of high-strength concrete columns confined with high-strength steel Please register to access this resource It only takes a moment to register and get access instantly.

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Improving flexural ductility of high-strength concrete

With the advent of advanced mineral and chemical admixtures, the strength level of concrete has been raised dramatically and high-strength concrete (HSC) is becoming more and more commonly used. However, HSC is generally more brittle than normal strength concrete. In fact, it has been shown that the use of HSC, if not properly controlled, could significantly reduce the flexural ductility of ...

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Flexural ductility design of high‐strength concrete

In the seismic design of a structure, it is necessary to provide not only sufficient strength, but also a minimum level of flexural ductility for reinforced concrete (RC) columns. Eurocode EN1998‐1 directly...

Get price

Strength and Ductility Simulation of High-Strength ...

The strength statistics of 48 reinforced concrete columns representing normal-, high-, and very-high-strength are evaluated. The effects of the amount of confining steel, amount of longitudinal steel, and slenderness ratio are examined. Finally, ductility statistics at three different axial load levels are obtained.

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Strength and Ductility of Fiber-Reinforced High

2000-4-19  In this study 21 high-strength, fiber-reinforced columns were tested consisting of 9 155-mm square columns and 12 200-mm square columns. The concrete mix contained 2% (by weight) of end hooked steel fibers and with concrete strengths ranging from 67 to 88 MPa.

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Strength and ductility of fiber-reinforced high

Strength and ductility of fiber-reinforced high-strength concrete columns. [1] School of Civ. and Envir. Engrg., Univ. of New South Wales, Sydney, Australia. Journal of structural engineering (New York, NY). 2001, Vol 127, Num 1, pp 28-34 ; Illustration ; ref : 19 ref. 001 Exact sciences and technology / 001D Applied sciences / 001D14 Buildings ...

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Ductility and stiffness of slender confined reinforced ...

2019-11-1  Ductility and stiffness of slender confined reinforced high-strength concrete columns under monotonic axial load ... Table 3 also summarises the percentage of the improvement in ductility for different columns relative to their control specimen. Obviously, the confinement exhibited higher gain in ductility for columns with λ = 16. For short ...

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Critical factors in displacement ductility assessment of ...

Ductility of high-strength concrete (HSC) columns with rectangular sections was assessed in this study by reviewing experimental data from the available literature. Up to 112 normal weights concrete columns with strength in the range of 50-130 MPa were considered and presented as a database. The data included the results of column testes under axial and reversed lateral loading.

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Improving ductility of non-seismically designed RC

2020-1-22  Previous research7–10 has indicated that the strength and ductility of RC columns increase with core concrete confinement and are influenced significantly by the tie configurations. This paper reports tests on non-seismically designed RC columns with various configurations of transverse reinforcement with horizontal ties.

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Seismic Performance of High-Strength Concrete

This paper presents the experimental results of six scaled high-strength concrete columns with concrete compressive strengths of 76–86 MPa. Primary experimental parameters include axial loads ranging from 10 to 20% of column axial load-carrying capacity based on concrete gross section; longitudinal steel ratios of 2.46 to 3.53% of the gross sectional area; and volumetric ratios of transverse ...

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