Probabilistic modelling of residual stress in advanced analysis of steel structures

2014 ◽  
Vol 101 ◽  
pp. 407-414 ◽  
Author(s):  
S. Shayan ◽  
K.J.R. Rasmussen ◽  
H. Zhang
Keyword(s):  
Residual Stress ◽  
Steel Structures ◽  
Probabilistic Modelling ◽  
Advanced Analysis

Influence of the Welded Joint on the Mechanical Behavior of Steel Piles during Static and Dynamic Deformation

2007 ◽  
Vol 345-346 ◽  
pp. 1469-1472
Author(s):  
Gab Chul Jang ◽  
Kyong Ho Chang ◽  
Chin Hyung Lee
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Mechanical Behavior ◽  
Welded Joint ◽  
Dynamic Deformation ◽  
Three Dimensional ◽  
Steel Structures ◽  
Residual Stress Distribution ◽  
Dynamic Mechanical Behavior ◽  
Steel Piles

During manufacturing the welded joint of steel structures, residual stress is produced and weld metal is used inevitably. And residual stress and weld metal influence on the static and dynamic mechanical behavior of steel structures. Therefore, to predict the mechanical behavior of steel pile with a welded joint during static and dynamic deformation, the research on the influence of the welded joints on the static and dynamic behavior of steel pile is clarified. In this paper, the residual stress distribution in a welded joint of steel piles was investigated by using three-dimensional welding analysis. The static and dynamic mechanical behavior of steel piles with a welded joint is investigated by three-dimensional elastic-plastic finite element analysis using a proposed dynamic hysteresis model. Numerical analyses of the steel pile with a welded joint were compared to that without a welded joint with respect to load carrying capacity and residual stress distribution. The influence of the welded joint on the mechanical behavior of steel piles during static and dynamic deformation was clarified by comparing analytical results

05.36: An efficient approach to limiting the elastic range in advanced analysis of steel structures via RPHM

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 1353-1362
Author(s):  
Ígor José Mendes Lemes ◽  
Rafael Cesário Barros ◽  
Everton André Pimentel Batelo ◽  
Ricardo Azoubel da Mota Silveira
Keyword(s):  
Steel Structures ◽  
Efficient Approach ◽  
Elastic Range ◽  
Advanced Analysis

ADVANCED ANALYSIS WITH STRAIN LIMITS FOR THE DESIGN OF STEEL STRUCTURES

2018 ◽  
Author(s):  
Andreas C. Fieber ◽  
◽  
Leroy Gardner ◽  
Lorenzo Macorini ◽  
◽  
...  
Keyword(s):  
Steel Structures ◽  
Advanced Analysis

Numerical Analysis of the Influence on High Humidity in a T-Joint Fillet Weld for High Strength Low Alloy Steel

2014 ◽  
Vol 651-653 ◽  
pp. 56-59
Author(s):  
Song Ping Chen ◽  
Yong Xian Li ◽  
Yan Ji Xie
Keyword(s):  
Residual Stress ◽  
Alloy Steel ◽  
Steel Structures ◽  
High Strength ◽  
Computational Procedure ◽  
Steel Plates ◽  
Transient Temperature ◽  
High Humidity ◽  
Low Alloy Steel ◽  
Port City

Welding at high humidity is frequently needed for the harbor hoisting machinery of steel structures in the coastal port city. A computational procedure is proposed for analyzing residual stress and temperature distributions induced by the T-joint welding in two types of St52-3 high strength low alloy steel plates both 6 mm in thickness. The relative humidity conditions varied from 75 to 90% at constant pressure. The finite element models are employed to evaluate the transient temperature and the residual stress during welding. According to the analysis results, the higher residual stress and the highest concentration of hydrogen are distributed in and surround the heat affected zone (HAZ), and vary with different humidity.

scholarly journals Análise inelástica de segunda ordem em pórticos planos de aço

2016 ◽  
Vol 12 (3) ◽  
Author(s):  
Alex Sander Clemente De Souza ◽  
Margot Fabiana Pereira ◽  
Silvana De Nardin
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Three Dimensional ◽  
Steel Structures ◽  
Nonlinear Effects ◽  
Design Codes ◽  
Analysis Model ◽  
Plane Frames ◽  
Advanced Analysis ◽  
Simplified Procedures

RESUMO: Na análise estrutural de edifícios é necessária e exigida em códigos de projeto a consideração do comportamento não-linear do material e da estrutura para determinação de esforços e deslocamentos. O desenvolvimento de novos softwares permite a realização de análises mais rigorosas, como a análise avançada, em que é possível avaliar a capacidade resistente e a estabilidade da estrutura dispensando a verificação dos elementos isolados e ainda considerando os efeitos não-lineares, sejam eles físicos e/ou geométricos. Por outro lado, os códigos normativos ainda permitem procedimentos simplificados para a análise estrutural, embora seja relativamente comum o uso de métodos mais avançados de análise, como por exemplo, o Método dos Elementos Finitos. Pretende-se, com este estudo, fornecer subsídios para a compreensão dos códigos normativos e a importância da escolha do modelo de análise estrutural na fase de projeto. Neste contexto, a fim de exemplificar, os efeitos das não-linearidades geométrica e física sobre o comportamento da estrutura foram avaliados pórticos planos em aço por meio de modelagem avançada. Além disso, uma modelagem com elementos finitos de barra / mola foi desenvolvida e os resultados obtidos se mostraram compatíveis com aqueles dos modelos tridimensionais onde os perfis foram modelados com elementos de chapa. Desta forma contribui-se para ampliar o estado da arte sobre análise estrutural de forma integrada com o dimensionamento de estruturas metálicas. ABSTRACT: In structural analysis of buildings it is necessary and required in design codes include non -linear effects on the material and structure for determining forces and displacements. The development of new software allows more rigorous analyzes, such as the advanced analysis; it is possible to assess the strength and stability of a structure excusing the verification of separate structural elements and considering the nonlinear effects. The design codes allow structural analysis by simplified procedures. However, it has been used advanced analysis methods such as the Finite Element Method. The aim of this study provide support for the normative codes and the importance of choosing the structural analysis model in the design phase. In order to illustrate the effects of geometry and physical nonlinearities on the behavior of the structure was evaluated plane frames steel through advanced modeling. In addition, a finite element modeling bar / spring was developed and the results obtained were consistent with those of three-dimensional shell models. In this way it contributes to extend the state of the art structural analysis integrated with the design of steel structures.

FE Welding Residual Stress Analysis and Validation for Spent Nuclear Fuel Canisiters

2018 ◽  
Author(s):  
Jae-Min Gim ◽  
Ji-Soo Kim ◽  
Yun-Jae Kim ◽  
Poh-Sang Lam
Keyword(s):  
Residual Stress ◽  
Stress Analysis ◽  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Steel Structures ◽  
Fe Analysis ◽  
Post Weld Heat Treatment ◽  
Welding Residual Stress ◽  
Weld Residual Stress ◽  
Welding Procedure

Spent Nuclear Fuel (SNF) Canisters are large welded stainless steel structures without post-weld heat treatment, possibly leaving large welding residual stresses (WRS). For CISCC assessments for SNF canisters, the estimation of the weld residual stress accurately is very important because tensile stress can make crack initiate. In this paper, the welding procedure for the SNF canisters is simulated through a FE analysis. Two-dimensional FE WRS analysis is performed for both longitudinal welding and circumferential welding. To simulate the welding procedure, heat analysis and stress analysis are conducted separately. The results are compared with the experimental mock-up canister WRS data conducted at the Sandia National Laboratories. It seems that FEA could sufficiently confirm the experimental data.

Simulation of the Residual Stress of Cold-Formed Thin-Wall Steel Members and Calculation of Load under Its Influence

2005 ◽  
Vol 490-491 ◽  
pp. 112-117
Author(s):  
Feng Zhao ◽  
Hua Chen Liu
Keyword(s):  
Residual Stress ◽  
Initial Stress ◽  
Technical Specification ◽  
Steel Structures ◽  
Thin Wall ◽  
Integral Points ◽  
Elastic Plastic ◽  
Steel Members ◽  
Specific Object ◽  
Set Up

Because of the particularity of distribution of the residual stress of cold-formed thin-wall steel members, now there has not yet been a proper method for directly considering the influence of the residual stress in calculating the reliable capacity of carrying load of cold-formed thin-wall steel members, and such is the typical case in China’s National Technical Specification of Cold-formed Thin-wall Steel Structures GB50018-2002. With the cold-formed thin-wall channel steel taken as specific object in this study as well as assumed to be ideal elastic-plastic body, their finite modular models are set up in ANSYS. According to the tested results and the distributing rules of residual stress, the models of the residual stress of cold-formed thin-wall channel steel are established close to the factual data, and also the initial stress file is set up that can describe the magnitude and distribution of the residual stress. The file has two features: first, it is likely to find out about the rules of the cold-steel residual stress varying in the direction of thickness by using the values of residual stress at some integral points in thickness direction of a specified module , and second, it is applicabled to simulate various distributions of residual stress. So the ultimate load of the member can be worked out and elastic-plastic calculating problem of cold-formed thin-walled steel sections can be easily solved by introducing the initial stress file into the stability analysis of ANSYS.

Advanced analysis and design of steel structures

Structures ◽  
2019 ◽  
Vol 17 ◽  
pp. 1
Author(s):  
Leroy Gardner ◽  
Nuno Silvestre ◽  
Tak-Ming Chan ◽  
Kwok-Fai Chung
Keyword(s):  
Steel Structures ◽  
Analysis And Design ◽  
Advanced Analysis

scholarly journals DIC-hole drilling method for in-situ residual stress measurement

2019 ◽  
Vol 275 ◽  
pp. 02004 ◽  
Author(s):  
Yang Peng ◽  
Jun Zhao ◽  
Lan-shu Chen ◽  
Jun Dong
Keyword(s):  
Residual Stress ◽  
Displacement Field ◽  
Stress Measurement ◽  
Steel Structures ◽  
Image Correlation ◽  
Residual Stress Measurement ◽  
Hole Drilling ◽  
Hole Drilling Method ◽  
Drilling Method

Residual stress measurement carries an important significance in ensuring safety and reliability of steel structures. In order to simplify the measurement procedure and enhance flexibility of the conventional hole drilling method to adopt in in-situ residual stress measurement, digital image correlation (DIC) is applied to measure the displacement field caused by the localized stress relief associated due to hole drilling. It is referred to as DIC-hole drilling method. The residual stress theoretical expressions of the DIC-hole drilling method are discussed. The requirements of drilling device, camera and lens are determined by accounting for the accuracy of the in-situ residual stress measurement. A benchmark experiment by using steel beam specimens is developed to verify the feasibility and reliability of DIC-hole drilling method. Test data are compared with theoretical calculations and FEM results. The comparison indicates the DIC-hole drilling method has enough accuracy for the in-situ residual stress measurement. The displacement field in the regions centred at 2 to 2.5 times drilling hole radius far from the hole is proposed for the accurate residual stress measurement.

scholarly journals Analysis of Mechanical Safety of Stadiums for the World Cup 2018

2018 ◽  
pp. 118-129 ◽  
Author(s):  
Alexander M. Belostotsky ◽  
Pavel A. Akimov ◽  
Andrey A. Aul ◽  
Dmitry S. Dmitriev ◽  
Yulia N. Dyadchenko ◽  
...  
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Computer Modelling ◽  
Concrete Structures ◽  
Steel Structures ◽  
Structural Safety ◽  
Reinforced Concrete Structures ◽  
World Cup ◽  
Advanced Analysis ◽  
Football Stadiums

It is obvious that contemporary design and construction of unique buildings and structures is unthinkable without mathematical (numerical) and computer modelling and advanced analysis ofload-bearing structures under various kinds ofloads and impacts. One of the most ambitious and important construction projects is the uniquelarge-span structures. These are, in particular, stadiums, sports palaces and water parks, shopping malls, pedestrian, road and railway bridges of various design solutions. The distinctive paper is devoted to theoretical foundations and results of mathematical (numerical) modeling of the state (in terms of the analysis of stress-strain state, strength and stability) of football stadiums built for the 2018 FIFA World Cup in Russia. Finite element method is used for approximation and high-precision numerical solution of corresponding boundary problems of structural mechanics. It is the most universal and powerful numerical method of mechanics. The paper, in particular, describes some features of development of finite element models and the main results of the analysis of the mechanical (structural) safety of three- dimensionallarge-span systems "soil foundation - reinforced concrete structures of foundations and stands - steel structures of the coating and facades" of these football stadiums with the basic and specialload combinations. In addition, the key procedures of scientific support during the corresponding expertise and assessments are outlined. Generally, socially significant and knowledge-intensive problem of providing mechanical (constructive) safety of unique combined objects of construction (three-dimensional systems "foundation - reinforced concrete structures of foundations and stands - steel structures of coating and facades") has been solved at a new level as a result of the performed complex of research works.

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