High-strength concrete exterior beam-column joints with high-yield strength steel reinforcements

2017 ◽  
Vol 145 ◽  
pp. 305-321 ◽  
Author(s):  
Pooya Alaee ◽  
Bing Li
Keyword(s):  
Yield Strength ◽  
High Strength Concrete ◽  
High Strength ◽  
High Yield ◽  
High Yield Strength ◽  
Strength Concrete

REPUBLIC 50

Alloy Digest ◽  
1967 ◽  
Vol 16 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Yield Strength ◽  
Physical Properties ◽  
Structural Steel ◽  
High Strength ◽  
Heat Treating ◽  
High Yield ◽  
Bend Strength ◽  
High Yield Strength

Abstract Republic 50 is a high-strength low-alloy structural steel recommended where high yield strength and toughness combined with good weldability and corrosion resistance are required. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive, shear, and bend strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-205. Producer or source: Republic Steel Corporation.

Structural Behavior of RC Cylinders Confined with High Strength Transverse Reinforcement

2010 ◽  
Vol 163-167 ◽  
pp. 1321-1324
Author(s):  
Sang A. Cha ◽  
Cho Hwa Moon ◽  
Sang Woo Kim ◽  
Kil Hee Kim ◽  
Jung Yoon Lee
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Yield Strength ◽  
High Strength Concrete ◽  
High Strength ◽  
Structural Behavior ◽  
Transverse Reinforcement ◽  
Strength Concrete ◽  
High Rise ◽  
Compressive Strength Of Concrete

The number of high-rise reinforced concrete (RC) buildings is steadily increasing since 1980’s. The use of high strength concrete is indispensible for high-rise RC construction to ensure sufficient strength of the structure. The effect of high strength concrete can be significantly improved by the use of high strength and large size reinforcing bars. The yield strength of transverse reinforcement is limited in the current design codes to prevent possible sudden concrete failure due to over reinforcement. This paper presents the effects of the yield strength of transverse reinforcement and compressive strength of concrete on the structural behavior of reinforced concrete cylinders. Two parameters were considered in this investigation: compressive strength of concrete and the yield strength of transverse reinforcement (472MPa, 880MPa, and 1,430 MPa). Analytical and experimental results indicated that the structural behavior of RC cylinders confined with high strength transverse reinforcement is strongly influenced by compressive strength of concrete.

scholarly journals Modeling Shear Strength of Medium- to Ultra-High-Strength Concrete Beams with Stirrups using SVR and Genetic Algorithm

2021 ◽  
Author(s):  
Chun-song Jiang ◽  
Gui-Qin Liang
Keyword(s):  
Genetic Algorithm ◽  
Shear Strength ◽  
Yield Strength ◽  
High Strength Concrete ◽  
Concrete Beams ◽  
High Strength ◽  
Reinforcement Ratio ◽  
Longitudinal Reinforcement ◽  
Strength Concrete ◽  
Shear Span

Abstract This paper presents a data-driven machine learning approach of support vector regression (SVR) with genetic algorithm (GA) optimization approach called SVR-GA for predicting the shear strength capacity of medium-to ultra-high strength concrete beams with longitudinal reinforcement and vertical stirrups. 148 experimental samples collected with different geometric, material and physical factors from literature were utilized for SVR-GA with 5-fold cross validation. Shear influence factors such as the stirrup spacing, the beam width, the shear span-to-depth ratio, the effective depth of the beam, the concrete compressive and tensile strength, the longitudinal reinforcement ratio, the product of stirrup ratio and stirrup yield strength were served as input variables. The simulation results show that the predicted shear strength of SVR-GA model can achieve high accuracy based on testing set with a coefficient of determination (R2) of 0.9642, root mean squared error (RMSE) of 1.4685 and mean absolute error (MAE) of 1.0216 superior to that for traditional SVR model with 0.9379, 2.0375 and 1.4917. The sensitivity analysis reveals that the most important variables affecting the prediction of the shear strength are shear span-to-depth ratio, concrete compressive strength, reinforcement ratio and the product of stirrup ratio and stirrup yield strength. Three-dimensional input/output maps can vividly reflect the nonlinear variation of the shear strength with the two coupling variables. All in all, the proposed SVR-GA model presents an effective and accurate artificial intelligence technology for modeling the shear strength of ultra-high strength concrete beams with stirrups.

The Effective Utilization of Yield Strength

1971 ◽  
Vol 93 (4) ◽  
pp. 962-968
Author(s):  
J. H. Gross
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Yield Strength ◽  
Stress Corrosion ◽  
High Strength Steels ◽  
High Strength ◽  
High Yield ◽  
High Yield Strength ◽  
Stress Dependent ◽  
Design Stress

In many structural and constructional applications (such as pressure vessels), steels, particularly high-yield-strength steels, are not being utilized as effectively as may be possible. This occurs because the design stress permitted by many specifications and codes is effectively based only on the tensile strength. Thus, the increase in yield-to-tensile-strength ratio with increasing tensile strength is not recognized, and no design-stress credit is given for the proportionately higher yield strength of high-strength steels. Because increased utilization of yield strength will probably require demonstration of the satisfactory fabricability and service performance of high-yield-strength steels, the present paper summarizes the general effects of increased yield strength on formability and weldability and on resistance to failure by stress-dependent modes—overload, brittle fracture, fatigue, and stress corrosion. The present state of knowledge indicates that fabrication does not significantly limit the use of high-strength steels. Although high-yield-strength steels are more difficult to form and weld than lower-strength steels, appropriate forming and welding practices that are not unduly restrictive are in common use for such steels. If design stress is based directly on yield strength, the safety factor against failure by simple overload or by unstable propagation of a crack decreases with increasing yield strength. However, increasing fracture toughness can significantly reduce susceptibility to failure by unstable crack propagation that is the result of low shear energy absorption or the growth of cracks to critical size by fatigue or stress corrosion. In recent years, the fracture toughness of steel has been continuously rising because control of metallurgical factors is continuously improving. For this and other reasons that suggest beneficial effects of yield strength, the possibility of more effectively utilizing the yield strength of steel should be reexamined.

DEVELOPMENT OF HIGH STRENGTH Mg-Cu-Zn ULTRAFINE EUTECTIC COMPOSITES WITH ENHANCED PLASTICITY

2009 ◽  
Vol 23 (06n07) ◽  
pp. 947-952 ◽  
Author(s):  
KIAN SONG ◽  
KI BUEM KIM ◽  
JIN MAN PARK ◽  
JAE SEOL LEE ◽  
JOON SIK PARK ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Plastic Strain ◽  
Yield Strength ◽  
Room Temperature ◽  
High Strength ◽  
Eutectic Structure ◽  
High Yield ◽  
Length Scale ◽  
High Yield Strength ◽  
Micrometer Size

Mg - Cu - Zn ultrafine eutectic composites with different length scale heterogeneity, consisting of micrometer size dendrites and/or ultrafine scale bimodal eutectics, exhibit high yield strength as well as good plasticity at room temperature compression. Among these alloys, micron-scale α- Mg dendrites reinforced ultrafine eutectic composites exhibit high yield strength of 310 ~ 420 MPa and large plasticity of 7 ~ 12%. Meanwhile, a Mg 72Cu5Zn23 alloy comprising a bimodal eutectic structure without the micron-scale α- Mg dendrites shows the optimized mechanical properties the highest yield strength of 455 MPa combined with a considerable plastic strain of ~5%.

Modelling of a Composite Prosthesis for Quasi-Cylindrical Ligaments

1980 ◽  
Vol 102 (3) ◽  
pp. 194-198 ◽  
Author(s):  
G. Drouin ◽  
R. Dore´ ◽  
P. S. Thiry ◽  
C. Jean-Francois
Keyword(s):  
Yield Strength ◽  
Cruciate Ligament ◽  
High Strength ◽  
Elastic Behavior ◽  
High Yield ◽  
High Yield Strength ◽  
Deformation Response ◽  
The Core ◽  
Design Variables ◽  
Material Composite

A prosthesis for a cruciate ligament of the knee involves the problem of implanting a short and small spring for which the load-deformation response cannot be duplicated by any single man-made material. This work presents a model of the elastic behavior of a two material composite prosthesis made of high-strength fibers spirally wound around a soft elastic core. At each end of the core, the fibers are attached to a pulling device. Under a tension load, the fibers exert a pressure on the core which deforms radially, permitting the elongation of the prosthesis. This allows the achievement of large deformation while both the fibers and the core remain in the elastic domain. The high strength of the spring is provided by the high yield strength of the fibers. The results show the influence of the design variables on the deformation of the prosthesis.

STELCOLOY-S

Alloy Digest ◽  
1966 ◽  
Vol 15 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Yield Strength ◽  
Physical Properties ◽  
High Strength ◽  
Heat Treating ◽  
High Yield ◽  
Bend Strength ◽  
Low Alloy Steel ◽  
Steel Company ◽  
High Yield Strength

Abstract STELCOLOY-S is a high-strength low-alloy steel recommended where high yield strength combined with toughness are required in such applications as earth moving equipment, railroad and mine cars and bridges. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-198. Producer or source: The Steel Company of Canada Ltd.

Study on Strength Development of High Strength Concrete Containing Alccofine and Fly-Ash

2012 ◽  
Vol 2 (3) ◽  
pp. 102-104 ◽  
Author(s):  
Suthar Sunil B ◽  
◽  
Dr. (Smt.) B. K. Shah Dr. (Smt.) B. K. Shah
Keyword(s):  
Fly Ash ◽  
High Strength Concrete ◽  
High Strength ◽  
Strength Development ◽  
Strength Concrete
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