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Journal of Structural Engineering / Volume 137 / Issue 12 / TECHNICAL PAPERS

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Numerical Investigation on the Behavior of Circumferentially Butt-Welded Steel Circular Hollow Section Flexural Members

J. Struct. Eng. 137, 1395 (2011); http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000406 (10 pages)

Chin-Hyung Lee1 and Kyong-Ho Chang2

1Researcher, Dept. of Civil and Environmental Engineering, Chung-Ang Univ., 221, Huksuk-dong, Dongjak-ku, Seoul 156-756, Republic of Korea. E-mail: ifinder@hanmail.net
2Professor, Dept. of Civil and Environmental Engineering, Chung-Ang Univ., 221, Huksuk-dong, Dongjak-ku, Seoul 156-756, Republic of Korea (corresponding author). E-mail: ifinder11@freechal.com

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(Submitted 1 March 2010; accepted 18 February 2011; posted ahead of print 21 February 2011)

This paper presents a finite element (FE) analysis to quantify the effects of weld-induced residual stresses on the flexural behavior of circumferentially butt-welded steel circular hollow section (CHS) members. FE modeling of the weld-induced residual stresses is first described. Nonlinear FE analysis in which the behavior of the CHS members subjected to bending is explored incorporating the residual stresses is discussed next. Two FE CHS tube models with different failure modes are developed in order to clarify the effects that the residual stresses have on the flexural behavior. Simulated results show that welding residual stresses can have significant effects on the initial stiffness and the ultimate strength of the CHS flexural members depending on the loading position; hence, they should be taken into account in assessing the behavior of steel CHS members with circumferential weld under bending.

© 2011 American Society of Civil Engineers

Acknowledgments

This research was supported by the Chung-Ang University Research Grants in 2011.

Article Outline

  1. Introduction
  2. Residual Stresses in Circumferentially Butt-Welded Steel Circular Hollow Section Members
    1. FE Analysis Method
      1. Thermal Analysis
      2. Mechanical Analysis
  3. Verification
  4. Three-Dimensional Finite Element Model
  5. Results and Discussion
  6. Behavior of the Circular Hollow Section Members under Bending
    1. Finite Element Model for Analysis
  7. Results and Discussion
  8. Conclusions

KEYWORDS

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ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000406

PUBLICATION DATA

ISSN

0733-9445 (print)  
1943-541X (online)

Publisher

American Society of Civil Engineers

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