Research Directions in Welded High Strength Steel Structures

1990 ◽  
pp. 193-207
Author(s):  
R. M. Denys
Keyword(s):  
High Strength Steel ◽  
Steel Structures ◽  
High Strength ◽  
Research Directions

Study on the Local Buckling Behavior of Steel Equal Angle Members under Axial Compression with the Steel Strength Variation

2011 ◽  
Vol 374-377 ◽  
pp. 2430-2436
Author(s):  
Gang Shi ◽  
Zhao Liu ◽  
Yong Zhang ◽  
Yong Jiu Shi ◽  
Yuan Qing Wang
Keyword(s):  
Finite Element ◽  
Axial Compression ◽  
High Strength Steel ◽  
Local Buckling ◽  
Steel Structures ◽  
High Strength ◽  
Element Analysis ◽  
Equal Angle ◽  
Buckling Behavior ◽  
Steel Strength

High strength steel sections have been increasingly used in buildings and bridges, and steel angles have also been widely used in many steel structures, especially in transmission towers and long span trusses. However, high strength steel exhibits mechanical properties that are quite different from ordinary strength steel, and hence, the local buckling behavior of steel equal angle members under axial compression varies with the steel strength. However, there is a lack of research on the relationship of the local buckling behavior of steel equal angle members under axial compression with the steel strength. A finite element model is developed in this paper to analyze the local buckling behavior of steel equal angle members under axial compression, and study its relationship with the steel strength and the width-to-thickness ratio of the angle leg. The finite element analysis (FEA) results are compared with the corresponding design method in the American code AISC 360-05, which provides a reference for the related design.

scholarly journals Performance analysis of the bump beams made of High Strength Steel and Carbon Fiber reinforce plastics

2018 ◽  
Vol 207 ◽  
pp. 03006
Author(s):  
Yi Yao ◽  
Quan Yuan ◽  
Sihuan Fu
Keyword(s):  
Carbon Fiber ◽  
Automobile Industry ◽  
High Strength Steel ◽  
Lightweight Design ◽  
High Strength ◽  
Research Directions ◽  
Deformation And Failure ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Fiber Reinforce

Lightweight and safe are the key research directions of the automobile industry. Bump beam is an important part of the car safety protection and it’s lightweight design has drawn much attention. In this paper, the static strength and the low-speed impact performances of two types of bump beam with the same structure, which made of carbon fiber reinforced plastics (CFRP) and high strength steel (HSS), were investigated. Under the condition of static press, frontal and 40% offset impact, part structural stiffness, component crush intrusion, energy absorption were comparison analyzed. In order to guide the product design, the deformation and failure of CFRP beams with five different laminate structures were simulated under frontal and 40% offset impact. The results indicate that, with the same structure, the properties of CFRP bump beam are generally superior to HSS product, more conducive to lightweight and the optimum design of the laminate is [0° / 60° / 120°]

Review on High Strength Steel Bolted End-Plate Connections

2015 ◽  
Vol 744-746 ◽  
pp. 265-273
Author(s):  
Xi Yu Wang ◽  
Yong Feng Luo ◽  
Xu Hong Qiang ◽  
Xiao Liu
Keyword(s):  
High Strength Steel ◽  
Structural Engineering ◽  
Mechanical Performance ◽  
Rapid Development ◽  
Steel Structures ◽  
High Strength ◽  
Design Standards ◽  
Existing Problems ◽  
End Plate ◽  
Plate Connections

Past three decades have seen the rapid development of high strength steel (HSS) in its application in structural engineering. However, so far the mechanical performance of a HSS beam-to-column connection has not been systematically studied, especially for bolted end-plate connections, the commonly employed beam-to-column connections in steel structures, which could restrict the application of HSS. Therefore, this paper aims to represent the basic methods, current achievements, recent applications, and the existing problems that lie in the way. In doing so, this paper is composed of three parts, experimental results, numerical analysis as well as component method. At the end, this paper indicates that future investigation should be based upon experimental analysis and proper finite element modeling, to verify a numerical model and to refine design standards.

Use and design of high strength steel structures

2003 ◽  
Vol 100 (11) ◽  
pp. 1115-1123 ◽  
Author(s):  
B. Johansson
Keyword(s):  
High Strength Steel ◽  
Steel Structures ◽  
High Strength

Investigation of ductile fracture behavior of lap-welded joints with 460 MPa steel

2017 ◽  
Vol 21 (9) ◽  
pp. 1376-1387 ◽  
Author(s):  
Gang Shi ◽  
Yufeng Chen
Keyword(s):  
Ductile Fracture ◽  
Welded Joints ◽  
High Strength Steel ◽  
Fracture Behavior ◽  
Steel Structures ◽  
High Strength ◽  
Welded Steel ◽  
Fracture Parameters ◽  
Tension Tests ◽  
Micromechanics Models

Fractures in welded connections usually occurred at Earthquake. The lap-welded joints are an important type of welded connections in high strength steel structures. In this article, the ductile fracture behavior of lap-welded joints has been studied experimentally and numerically with 460 MPa steel. A series of coupon tests were used to determine two corresponding weld materials (ER55-D2 and ER55-G) mechanical properties. Two micromechanics models (void growth model and stress-modified critical strain models) had been calibrated by circumferentially notched tension specimens and calculated the fracture parameters numerically, which had been applied in predicting in five lap-welded joints. The experimental study showed that the fracture mode of 460 MPa lap-welded joints exhibited plastic damage under the tension tests. Numerical analysis of the fracture parameters also showed that the ductile fracture behavior of lap-welded joint with ER55-G was better. The study establishes an accurate numerical model for analyzing the ductile fracture behavior of Q460 high strength steel lap-welded joints that is applicable in predicting the fracture failure of welded steel structures.

A Particle Swarm Algorithm-Based Optimization for High-Strength Steel Structures

2012 ◽  
Vol 28 (01) ◽  
pp. 1-9
Author(s):  
Soren Ehlers
Keyword(s):  
High Strength Steel ◽  
Failure Strain ◽  
Particle Swarm ◽  
Steel Structures ◽  
High Strength ◽  
Good Choice ◽  
Nonlinear Finite Element ◽  
Particle Swarm Algorithm ◽  
Swarm Optimization ◽  
Shipbuilding Steel

Crash resistant ship structures with high post accidental residual strength are more and more important as a requirement of Goal Based Standards. A first step in the development of structures, which fulfill these requirements, is the rational identification of crashworthy structural concepts. Therefore, efficient optimization algorithms are needed, besides reliable numerical collision simulations. Particle swarm optimization (PSO) algorithms tend to improve the objective fast, which makes them a good choice for lengthy nonlinear finite element-based collision simulations. As an application of PSO and numerical collision simulations a liquefied natural gas tanker is optimized for crashworthiness. Furthermore, one concept using normal shipbuilding steel only and one concept using a combination of normal and high strength steel is investigated. Hence, it will be shown if the benefits from high strength steel outweigh the increase in cost. Therefore, it will be shown if the combination of normal and higher strength steel can result in increased crashworthiness, even though the high strength steel has a lower failure strain when compared with the normal steel.

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