Study on Mechanical Performance of Corroded High-Strength Steel Bars

2011 ◽  
Vol 250-253 ◽  
pp. 2524-2529
Author(s):  
Yang Hang Shi ◽  
Shao Feng Chu ◽  
De Hai Yu
Keyword(s):  
Experimental Method ◽  
High Strength Steel ◽  
Mechanical Performance ◽  
High Strength ◽  
Tension Test ◽  
Engineering Practice ◽  
Accelerated Corrosion ◽  
Corrosion Condition ◽  
Steel Bars ◽  
Different Diameters

In this paper, the experimental method is adopted to study the mechanical performance of corroded high-strength steel bars. HRB400 and HRB500 with different diameters are corroded by electrifying accelerated corrosion in the laboratory, followed the tension test on these corroded bars with different corroded degree. The studying of the corrosion condition and mechanical performance of corroded high-strength steel bars lay the basic foundation for the analysis and research on their selection and relevant structural resilience which provide the reference basis for engineering practice.

scholarly journals Experimental Investigation into Corrosion Effect on Mechanical Properties of High Strength Steel Bars under Dynamic Loadings

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Hui Chen ◽  
Jinjin Zhang ◽  
Jin Yang ◽  
Feilong Ye
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Dynamic Loading ◽  
High Strength Steel ◽  
High Strength ◽  
Tensile Tests ◽  
Reinforcing Steel ◽  
Test Results ◽  
Cross Sectional ◽  
Steel Bars

The tensile behaviors of corroded steel bars are important in the capacity evaluation of corroded reinforced concrete structures. The present paper studies the mechanical behavior of the corroded high strength reinforcing steel bars under static and dynamic loading. High strength reinforcing steel bars were corroded by using accelerated corrosion methods and the tensile tests were carried out under different strain rates. The results showed that the mechanical properties of corroded high strength steel bars were strain rate dependent, and the strain rate effect decreased with the increase of corrosion degree. The decreased nominal yield and ultimate strengths were mainly caused by the reduction of cross-sectional areas, and the decreased ultimate deformation and the shortened yield plateau resulted from the intensified stress concentration at the nonuniform reduction. Based on the test results, reduction factors were proposed to relate the tensile behaviors with the corrosion degree and strain rate for corroded bars. A modified Johnson-Cook strength model of corroded high strength steel bars under dynamic loading was proposed by taking into account the influence of corrosion degree. Comparison between the model and test results showed that proposed model properly describes the dynamic response of the corroded high strength rebars.

The effect of trace elements (Cu and Sn) on mechanical properties of steel castings

1980 ◽  
Vol 295 (1413) ◽  
pp. 125-125
Keyword(s):  
Mechanical Properties ◽  
Trace Elements ◽  
Regression Analysis ◽  
Experimental Work ◽  
High Strength Steel ◽  
Mechanical Performance ◽  
High Strength ◽  
Residual Elements ◽  
Steel Castings ◽  
Effect Of Copper

Because of the increase in the levels of residual elements in steel, a programme of work was initiated to determine the limits of copper and tin impurities that were tolerable in steel castings. A 1.5 % Mn—Mo steel was chosen as a base, since any effect of trace elements would be readily apparent in terms of mechanical performance in this medium—high strength steel. The effect of copper was investigated within the range < 0.01-0.5 %, and tin within the range < 0.01-0.26%. The results were analysed by using factorial analysis in the first instance and later, as the amount of experimental work expanded and more results became available, a regression analysis was used.

Fracture toughness of high-strength steel bars

2017 ◽  
Vol 170 ◽  
pp. 119-129 ◽  
Author(s):  
M. Elices ◽  
M. Perez-Guerrero ◽  
M. Iordachescu ◽  
A. Valiente
Keyword(s):  
Fracture Toughness ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Bars

Hysteretic Behavior of Composite Vertical Connection Structures used in Prefabricated Shear Wall Systems

2020 ◽  
Vol 20 (06) ◽  
pp. 2040007
Author(s):  
Limeng Zhu ◽  
Haipeng Yan ◽  
Po-Chien Hsiao ◽  
Jianhua Zhang
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
High Strength Steel ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Shear Walls ◽  
High Strength ◽  
Shear Wall ◽  
Hysteretic Behavior ◽  
Design Standards

An innovative composite vertical connecting structure (CVC) with capacity carrying and energy-dissipating ability is proposed in this study, which could be used in prefabricated composite shear wall structural systems to enhance the resilience and seismic performance of structural system. The CVC structure is mainly composed of three parts, including the connecting zone, the capacity bearing zone characterized by high strength and elastic deforming ability, and the energy-dissipating zone assembled by replaceable metal dampers. The low-yield strength steel and high-strength steel are used, respectively, for the metal dampers in the energy-dissipating zone and the concrete-filled high-strength steel tubes in the bearing capacity zone to enhance the energy dissipation and self-centering abilities of CVC structures. The working mechanism is analyzed and validated through finite element models built in ABAQUS. The hysteretic behavior is simulated to evaluate their performance. First, the metal dampers are designed. The theoretical and finite elemental parametric analysis are carried out. According to the simulation results, the “Z-shaped” metal dampers exhibit better energy-dissipating ability than the rectangular shape, in which the “Z-shaped” metal dampers with 45∘ show the best performance. Simultaneously, the results of the models calculated by the finite element method and theoretical analysis work very well with each other. Furthermore, seven FE models of shear walls with CVC structures are designed. Monotonic and cyclic loading simulations are conducted. The failure modes and comprehensive mechanical performance are investigated and evaluated according to their calculated force–displacement curves, skeleton curves, and ductility coefficients. The results indicate that the CVC structure delivered preferable lateral-bearing capacity and displacement ductility. Finally, according to available design standards, the lateral stiffness of CVC structures could be conventionally controlled and some practical design recommendations are discussed.

Analysis of workpiece thermal behaviour in cut-off grinding of high-strength steel bars to control quality and efficiency

CIRP Annals ◽  
2019 ◽  
Vol 68 (1) ◽  
pp. 325-328 ◽  
Author(s):  
Matthias Putz ◽  
Macario Cardone ◽  
Martin Dix ◽  
Rafael Wertheim
Keyword(s):  
Thermal Behaviour ◽  
High Strength Steel ◽  
High Strength ◽  
Control Quality ◽  
Steel Bars
Sign in / Sign up

Export Citation Format

Share Document