Finite element investigation on plate buckling coefficients of tapered steel members web plates

Structures ◽  
2020 ◽  
Vol 28 ◽  
pp. 2321-2334
Author(s):  
Mostafa Mohamed Ibrahim ◽  
Ihab Mohamed El Aghoury ◽  
Sherif Abdel-Basset Ibrahim
Keyword(s):  
Finite Element ◽  
Plate Buckling ◽  
Steel Members ◽  
Web Plates

scholarly journals Surface Rust Detection Using Ultrasonic Waves in a Cylindrical Geometry by Finite Element Simulation

2018 ◽  
Vol 3 (3) ◽  
pp. 29 ◽  
Author(s):  
Qixiang Tang ◽  
Cong Du ◽  
Jie Hu ◽  
Xingwei Wang ◽  
Tzuyang Yu
Keyword(s):  
Finite Element ◽  
Early Stage ◽  
Steel Corrosion ◽  
Steel Structures ◽  
Potential Method ◽  
Ultrasonic Waves ◽  
Steel Plates ◽  
Fiber Optic Sensor ◽  
Surface Corrosion ◽  
Steel Members

Detection of early-stage corrosion on slender steel members is crucial for preventing buckling failures of steel structures. An active photoacoustic fiber optic sensor (FOS) system is reported herein for the early-stage steel corrosion detection of steel plates and rebars using surface ultrasonic waves. The objective of this study is to investigate a potential method for detecting surface corrosion/rust of steel rods using numerically simulated surface ultrasonic waves. The finite element method (FEM) was applied in the simulation of propagating ultrasonic waves on steel rod models. The pitch-catch mode of damage detection was adopted, in which one source (transmitter) and one sensor (receiver) were considered. In this research, radial displacements at the receiver were simulated and analyzed by short-time Fourier transform (STFT) for detecting, locating, and quantifying surface rust located between the transmitter and the receiver. From our time domain and frequency domain analyses, it was found that the presence, location, and dimensions (length, width, and depth) of surface rust can be estimated by ultrasonic wave propagation.

scholarly journals Surface Rust Detection Using Ultrasonic Waves in a Cylindrical Geometry by Finite Element Simulation

2018 ◽  
Author(s):  
Qixiang Tang ◽  
Cong Du ◽  
Jie Hu ◽  
Xingwei Wang ◽  
Tzuyang Yu
Keyword(s):  
Finite Element ◽  
Early Stage ◽  
Steel Corrosion ◽  
Steel Structures ◽  
Ultrasonic Waves ◽  
Steel Plates ◽  
Surface Corrosion ◽  
Steel Members ◽  
Length Width ◽  
Simulated Surface

Detection of early stage corrosion on slender steel members is crucial for preventing buckling failures of steel structures. An active photoacoustic fiber optic sensors (FOS) system has been reported for early stage steel corrosion detection of steel plates and rebars using surface ultrasonic waves. The objective of this paper is to investigate the surface corrosion/rust detection problem on steel rods using numerically simulated surface ultrasonic waves. The finite element method (FEM) is applied in simulating the propagation of ultrasonic waves on steel rod models. Transmission mode of damage detection is adopted, in which one source (transmitter) and one sensor (receiver) are considered. In this research, radial displacements at the receiver were simulated and analyzed by short-time Fourier transform (STFT) for detecting, locating, and quantifying a surface rust located between the transmitter and the receiver. From our time domain and frequency domain analyses, it is found that the presence, location, and dimensions (length, width, and depth) of surface rust can be estimated by ultrasonic waves propagating through the surface rust.

Finite Element Analysis on the Local Buckling Behavior of High Strength Steel Members under Axial Compression

2011 ◽  
Vol 243-249 ◽  
pp. 1477-1482 ◽  
Author(s):  
Gang Shi ◽  
Cuo Cuo Lin ◽  
Yuan Qing Wang ◽  
Yong Jiu Shi ◽  
Zhao Liu
Keyword(s):  
Finite Element ◽  
Axial Compression ◽  
High Strength Steel ◽  
Local Buckling ◽  
High Strength ◽  
Finite Element Models ◽  
Loading Capacity ◽  
Element Analysis ◽  
Steel Members ◽  
Buckling Behavior

Compared to the ordinary strength steel extensively applied in structures currently, high strength steel, a new kind of construction material, has many differences on mechanical properties. Though high strength steel has been applied in several projects in the world, which has obtained good effects, there is a lack of the design method for high strength steel structures and researches on the loading capacity of high strength steel members. To study the local buckling behavior of high strength steel members under axial compression, finite element models are developed to predict the loading capacity of high strength steel welded I-section and box-section stub columns under axial compression in this paper. With accurate simulation of 17 high strength steel specimens, the finite element analysis results agree well with the corresponding test results, and the average deviation of the ultimate loading capacity of 17 specimens is about -3.1%. It’s verified that the finite element models developed in this paper can accurately simulate high strength steel members with the initial geometric imperfections and residual stresses, and analyze the local buckling behavior of high strength steel members under axial compression. In addition, it provides a basis for the parametric study of high strength steel members under axial compression in future.

scholarly journals Finite Element Analysis of Axial Compression Steel Members Strengthened with Unbonded CFRP Laminates

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3540
Author(s):  
Fengky Satria Yoresta ◽  
Phan Viet Nhut ◽  
Yukihiro Matsumoto
Keyword(s):  
Finite Element ◽  
Axial Compression ◽  
Slenderness Ratio ◽  
Fiber Reinforced Polymers ◽  
Strength Increase ◽  
Fe Model ◽  
Element Analysis ◽  
Cfrp Laminates ◽  
Compression Performance ◽  
Steel Members

This paper presented a non-linear finite element (FE) analysis to investigate the potential of unbonded carbon fiber-reinforced polymers (CFRP) strengthening in improving the axial compression performance of steel members. The FE model was firstly developed and validated against experimental works. Four parameters considered in the parametric study were the number of CFRP layers, CFRP length, slenderness ratio, and elastic modulus of CFRP. It was confirmed that the unbonded CFRP strengthening method is effective at enhancing the load-carrying capacity as well as delaying the overall buckling of the axial steel members. The strength increase is highly affected by the first three parameters. In addition, the method of an equivalent slenderness ratio can be used for strength design.

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