Session Start Date

10-17-2002

Abstract

G450 steel to AS 1397 is a cold-reduced sheet steel with in-line galvanizing. Its grade is 65 ksi (450 MPa) yield and 70 ksi (480 MPa) tensile strength. It is widely used in Australia for purlins, and is being used to fabricate light-weight portal frames, often by welding. The effect of welding on G450 sheet steel in the heat affected zone (HAZ) was unknown and so the project was performed to investigate the strength of flare-bevel and flare-vee welded connections. Flare-bevel and flare-vee welded connections in 0.06-in (1.5-mm) and 0.12-in (3.0-mm) sheet steels were tested to failure. The failure modes and ductility of different types of connections are described. The test results are used to check the design rules in the AISI Specification (Section E2.5) and the Australian/New Zealand Standard for Cold-Formed Steel Structures AS/NZS 4600 (Clause 5.2.6). Connections in 0.12-in (3.0-mm) sheet steel failed in the weld and it is important that these connections are checked for weld throat failure, not just parent material failure. The quality of flare-bevel welded connections in thin sheet steels produced by industry fabricators is investigated. The results of this study have recently been incorporated into the AISI Specification for Cold-Formed Steel Structures by reducing the thickness at which weld throat failure should be checked to 2.5 mm (0.10 in).

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Meeting Name

16th International Specialty Conference on Cold-Formed Steel Structures

Publisher

University of Missouri--Rolla

Publication Date

10-17-2002

Document Version

Final Version

Rights

© 2002 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

 
COinS
 
Oct 17th, 12:00 AM

Strength and Behavior of Flare-bevel and Flare-vee Welded Connections in G450 Sheet Steel

G450 steel to AS 1397 is a cold-reduced sheet steel with in-line galvanizing. Its grade is 65 ksi (450 MPa) yield and 70 ksi (480 MPa) tensile strength. It is widely used in Australia for purlins, and is being used to fabricate light-weight portal frames, often by welding. The effect of welding on G450 sheet steel in the heat affected zone (HAZ) was unknown and so the project was performed to investigate the strength of flare-bevel and flare-vee welded connections. Flare-bevel and flare-vee welded connections in 0.06-in (1.5-mm) and 0.12-in (3.0-mm) sheet steels were tested to failure. The failure modes and ductility of different types of connections are described. The test results are used to check the design rules in the AISI Specification (Section E2.5) and the Australian/New Zealand Standard for Cold-Formed Steel Structures AS/NZS 4600 (Clause 5.2.6). Connections in 0.12-in (3.0-mm) sheet steel failed in the weld and it is important that these connections are checked for weld throat failure, not just parent material failure. The quality of flare-bevel welded connections in thin sheet steels produced by industry fabricators is investigated. The results of this study have recently been incorporated into the AISI Specification for Cold-Formed Steel Structures by reducing the thickness at which weld throat failure should be checked to 2.5 mm (0.10 in).