Location

Saint Louis, Missouri

Session Start Date

10-18-1994

Abstract

The paper describes a test program on welded stainless steel X- and K-joints fabricated from circular hollow section brace members and chords. The X-joints were tested in compression and tension using three different ratios of brace diameter to chord diameter. The K-joints were tested using three different ratios of brace diameter to chord diameter and three different angles between chord and brace members. A total of 15 tests were performed. Design rules are proposed for X- and K-joints by adopting the rules of the CIDECT Recommendations for carbon steel tubular structures and replacing the yield stress in these recommendations by a proof stress. It is shown that both the 0.2 % and 0.5 % proof stresses, as determined from the finished tube, can be used to determine the ultimate strength using the CIDECT strength rules. For K-joints, the serviceability limit state corresponding to joint deformations of 1 % of the chord diameter will not be exceeded if the CIDECT strength rules are adopted. However, for less than full width X-joints, the deformations are likely to reach about 1. 7 % and 1.9 % of the chord diameter if the design strength is based on the 0.2 % and 0.5 % proof stresses respectively.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Meeting Name

12th International Specialty Conference on Cold-Formed Steel Structures

Publisher

University of Missouri--Rolla

Publication Date

10-18-1994

Document Version

Final Version

Rights

© 1994 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Oct 18th, 12:00 AM

Stainless Steel Tubular Joints - Tests and Design of X- and K-joints in Circular Hollow Sections

Saint Louis, Missouri

The paper describes a test program on welded stainless steel X- and K-joints fabricated from circular hollow section brace members and chords. The X-joints were tested in compression and tension using three different ratios of brace diameter to chord diameter. The K-joints were tested using three different ratios of brace diameter to chord diameter and three different angles between chord and brace members. A total of 15 tests were performed. Design rules are proposed for X- and K-joints by adopting the rules of the CIDECT Recommendations for carbon steel tubular structures and replacing the yield stress in these recommendations by a proof stress. It is shown that both the 0.2 % and 0.5 % proof stresses, as determined from the finished tube, can be used to determine the ultimate strength using the CIDECT strength rules. For K-joints, the serviceability limit state corresponding to joint deformations of 1 % of the chord diameter will not be exceeded if the CIDECT strength rules are adopted. However, for less than full width X-joints, the deformations are likely to reach about 1. 7 % and 1.9 % of the chord diameter if the design strength is based on the 0.2 % and 0.5 % proof stresses respectively.