Generalities on welded connections

OBJECTIVE/SCOPE

To describe the different types of structural welds and give basic information on weld preparation and weld quality.

SUMMARY

Mechanical and geometrical characteristics of welds are described. Fundamental principles concerning edge preparation, fit-up, and quality of welds are given.

NOTATION

As% Elongation of steel at failure

a Throat thickness of welds        [mm]

fy Nominal yield strength of parent metal        [MPa]

fu Nominal ultimate strength of parent metal        [MPa]

1. INTRODUCTION

Where there are favourable working conditions, welding is the most economical way to make strong connections. Therefore, workshop connections are usually welded. Where site connections are necessary (erection) they are usually bolted except for bridges, but the connections are often prepared in the workshop with the welded plates, etc. necessary for the bolted joint.

Figures 1-3 show some examples on welded connections and the way they carry external loads.

Read more

Prerequisites

Introduction to the design of simple industrial buildings

Read Lecture

Concept and basis of steel metallurgy

Read Lecture

Mechanical properties of steel

Read Lecture

Introduction to connection design

Read Lecture

Related lectures

Steel grades and qualities

Read Lecture

Weldability of structural steels

Read Lecture

Principles of welding

Read Lecture

Generalities on welded connections

Read Lecture