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 Construction and design of welded structures

OBJECTIVES

At the end of the training course, the trainee will be capable of doing the following :  

 understand the effects of external loads on structures

 understand the principles governing the behavior of metallic welded structures under loading

 design, calculate and draw weld details related to a given assembly configuration

understand the different types of loading and the influence of temperature on structures

understand the development of fatigue and the influence of notches on metallic welded structures

 understand the special requirements of design and construction of pressure equipments with regard to the calculation of welds

 understand the behavior of welded aluminium structures

 understand and explain the main factors affecting welding stress and distortions

 establish a dialogue with design specialists and inspection personnel

 

SUITABLE FOR

Technicians and engineers, non specialized in construction and design of metallic structures and confronted with the problems of implementation of design rules and appreciation of structure design.

To get the best benefit of the course, it is highly recommended to have basic knowledge in the field of welding processes technology and welding metallurgy.

DURATION

5 days i.e. 35 hours.

 

GENERALITIES :

The course provides an introduction to the basics of construction, design and calculation of welded structures required for the understanding and implementation of construction codes.

TEACHING

Active, dynamic and participative, alternating theoretical overviews with case studies.

DETAILS

BASICS

BASIC THEORY OF STRUCTURAL SYSTEMS

Theory of forces

Equilibrium of forces and torques

Equilibrium of structural systems

Stress in structural systems

Calculation and determination of internal forces

FUNDAMENTALS OF THE STRENGTH OF MATERIALS

Types of stresses and deformations

Stress-strain relationship

Characteristic material properties

Calculation of stresses and section properties

WELDED JOINT DESIGN

Types of welded joints

Classification of groove shapes, tolerances

Welding symbols on drawings

Symbolic representation according to ISO 2553

BASICS OF WELD DESIGN

Types of stresses in welded joints

Calculation of section properties of welds

Worked examples of calculation of nominal stresses in welded joints

BEHAVIOR OF WELDED STRUCTURES

WELDED STRUCTURES UNDER DIFFERENT TYPES OF LOADING

Static strength

Elevated temperature strength

Low temperature strength

Types of fracture

WELDED STRUCTURES UNDER DYNAMIC LOADING

Types of cyclic loading

Fatigue strength

Stress distribution

Influence of notches and weld defects

Standards

 

DESIGN OF WELDED STRUCTURE

 

DESIGN OF WELDED STRUCTURES WITH PREDOMINANTLY STATIC LOA

Steel constructions

Use of different types of welds related to joint types

Use of standards and specifications

Worked examples

 

DESIGN OF DYNAMICALLY LOADED WELDED STRUCTURES

Range of application

Design details and notches classes

Acceptance criteria

DESIGN OF WELDED PRESSURE EQUIPMENT

Construction of boilers, pressure vessels, pipelines …

High and low temperatures applications

Details of design

RESIDUAL STRESSES AND DISTORTION

Influencing factors, origins

Thermal data of the materials

Shrinkage stresses

Relationship between shrinkage and distortion

Welding sequence techniques

Residual stresses : effects and reducing methods

Correction and removal of welding deformation

 

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