Strength and ductility enhancement in high-strength confined concrete

1994 ◽  
Vol 46 (168) ◽  
pp. 177-189 ◽  
Author(s):  
M. A. Issa ◽  
H. Toban
Keyword(s):  
High Strength ◽  
Confined Concrete ◽  
Strength And Ductility

FEM Analysis on Concrete Column Confined by Straps of BFRP Sheets

2013 ◽  
Vol 639-640 ◽  
pp. 1083-1086
Author(s):  
Xiao Kun Wang ◽  
Hua Xin Liu ◽  
Xue Zhi Wang ◽  
Cheng Zhai
Keyword(s):  
Compressive Strength ◽  
Axial Loading ◽  
Fem Analysis ◽  
High Strength ◽  
Confined Concrete ◽  
Concrete Column ◽  
Good Resistance ◽  
Axial Compressive Strength ◽  
Loading Tests ◽  
Strength And Ductility

More attention has been paid on the technology of BFRP in civil engineering due to it’s unique properties, such as high strength-to-weight radio, good resistance to corrosion and convenient to construction. In order to study the properties of BFRP sheets confined concrete column ,we did it through three groups of columns subjected to axial loading tests and FEM analyses, mainly considering the effect of spacing of straps of BFRP sheets confining concrete column.The results shows that the axial compressive strength and ductility of concrete column winded by BFRP straps have all increased and the process of destruction of concrete column wrapped by BFRP is longer than that of the unconfined concrete column.

Response of Confined Concrete to Cyclic Loading at Various Slow Strain Rates

1985 ◽  
Vol 64 ◽  
Author(s):  
S. H. Perry ◽  
A. H. Al-Shaikh ◽  
H. K. Cheong
Keyword(s):  
Cyclic Loading ◽  
Energy Absorption ◽  
High Strength ◽  
Confined Concrete ◽  
Strain Rates ◽  
Envelope Curve ◽  
Cyclic Behaviour ◽  
Strain Relationship ◽  
Steel Bolts ◽  
Strength And Ductility

ABSTRACTTests have been undertaken in the Imperial College concrete laboratories to study the effect of cyclic loading upon the compressive strength, the stress-strain relationship and the energy absorption and dissipation characteristics of concrete prisms at variable strain rates. Comparison is made with prisms loaded monotonically at similar strain rates. Prisms were confined by high-tensile steel bolts inserted horizontally in two orthogonal directions through pre-formed ducts, and the annular space between ducts and bolts was grouted with high strength epoxy resin. Both steel and concrete deformational response was measured. Significant enhancement of the strength and ductility of the concrete was obtained. Specimens displayed large energy absorption and dissipation capacity under cyclic loading. The validity of an envelope curve to describe cyclic behaviour is discussed.

APEX 417

Alloy Digest ◽  
1958 ◽  
Vol 7 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Dimensional Stability ◽  
High Strength ◽  
Heat Treating ◽  
Casting Alloy ◽  
Excellent Corrosion Resistance ◽  
Magnesium Casting ◽  
Strength And Ductility

Abstract APEX 417 is an aluminum-magnesium casting alloy having high strength and ductility, excellent corrosion resistance and good dimensional stability. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-61. Producer or source: Apex Smelting Company.

ALUMINUM 5056

Alloy Digest ◽  
1979 ◽  
Vol 28 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
High Strength ◽  
Heat Treating ◽  
Chromium Alloy ◽  
Temperature Performance ◽  
Wrought Aluminum ◽  
Strength And Ductility ◽  
Cold Workability ◽  
Manganese Chromium

Abstract ALUMINUM 5056 is a non-heat-treatable wrought aluminum-magnesium-manganese-chromium alloy possessing high strength and ductility along with good hot and cold workability. It is recommended for such applications as rivets and screen wire. It may be used with or without cladding. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Al-126. Producer or source: Various aluminum companies. Originally published June 1963, revised February 1979.

COPPER ALLOY No. C86100

Alloy Digest ◽  
1986 ◽  
Vol 35 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Copper Alloy ◽  
Iron Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Good Combination ◽  
Good Resistance ◽  
Copper Zinc ◽  
Strengthening Element ◽  
Strength And Ductility

Abstract Copper Alloy No. C86100 is a copper-zinc-aluminum-manganese-iron alloy, sometimes classified as a high-strength yellow brass. The principal strengthening element is aluminum. Its tensile strength is typically 95,000 psi (655 MPa). It has a good combination of strength and ductility along with good resistance to corrosion. Its typical uses are marine castings, gears, gun mounts, bearing and bushings. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-510. Producer or source: Copper alloy foundries.

COPPER ALLOY No. C86700

Alloy Digest ◽  
1985 ◽  
Vol 34 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Good Resistance ◽  
Strength And Ductility

Abstract Copper Alloy No. C86700 is a free-machining, high-tensile (typically 85,000 psi) cast manganese bronze; it is also known as high-strength yellow brass. It has an excellent combination of strength and ductility and good resistance to corrosion in numerous environments, including seawater. Typical uses are valve stems, moderate-duty gears and marine components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-499. Producer or source: Copper alloy foundries.

scholarly journals Facile route to bulk ultrafine-grain steels for high strength and ductility

Nature ◽  
2021 ◽  
Vol 590 (7845) ◽  
pp. 262-267
Author(s):  
Junheng Gao ◽  
Suihe Jiang ◽  
Huairuo Zhang ◽  
Yuhe Huang ◽  
Dikai Guan ◽  
...  
Keyword(s):  
High Strength ◽  
Ultrafine Grain ◽  
Strength And Ductility ◽  
Facile Route

Additively manufactured high strength and ductility CrCoNi medium entropy alloy with hierarchical microstructure

2021 ◽  
pp. 141545
Author(s):  
Bolun Han ◽  
Chengcheng Zhang ◽  
Kai Feng ◽  
Zhuguo Li ◽  
Xiancheng Zhang ◽  
...  
Keyword(s):  
High Strength ◽  
Hierarchical Microstructure ◽  
Strength And Ductility

scholarly journals Postheated Model of Confined High Strength Fibrous Concrete

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Kaleem A. Zaidi ◽  
Umesh K. Sharma ◽  
N. M. Bhandari ◽  
P. Bhargava
Keyword(s):  
High Temperature ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
High Strength ◽  
Fibre Volume ◽  
Experimental Results ◽  
Confined Concrete ◽  
Structural Safety ◽  
Stress Strain ◽  
Fibrous Concrete

HSC normally suffers from low stiffness and poor strain capacity after exposure to high temperature. High strength confined fibrous concrete (HSCFC) is being used in industrial structures and other high rise buildings that may be subjected to high temperature during operation or in case of an accidental fire. The proper understanding of the effect of elevated temperature on the stress-strain relationship of HSCFC is necessary for the assessment of structural safety. Further stress-strain model of HSCFC after exposure to high temperature is scarce in literature. Experimental results are used to generate the complete stress-strain curves of HSCFC after exposure to high temperature in compression. The variation in concrete mixes was achieved by varying the types of fibre, volume fraction of fibres, and temperature of exposure from ambient to 800°C. The degree of confinement was kept constant in all the specimens. A comparative assessment of different models on the high strength confined concrete was also conducted at different temperature for the accuracy of proposed model. The proposed empirical stress-strain equations are suitable for both high strength confined concrete and HSCFC after exposure to high temperature in compression. The predictions were found to be in good agreement and well fit with experimental results.

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