Vol. 14, No. 1, pp. 73-89(2018)
EXPERIMENTAL STUDY ON EVOLUTION OF
RESIDUAL STRESS IN WELDED BOX-SECTIONS AFTER
HIGH TEMPERATURE EXPOSURE
Weiyong Wang1,*, Shiqi Qin2, Venkatesh Kodur3 and Yuhang Wang4
1. Professor, School of Civil Engineering, Chongqing University, Key Laboratory of New Technology for
Construction of Cities in Mountain Area (Ministry of Education), Chongqing, China
* (Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it. )
2. Graduate student, School of Civil Engineering, Chongqing University, Chongqing, China
3. Professor, Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, 48824, USA.
4. Professor, School of Civil Engineering, Chongqing University, Chongqing, China
Received: 20 August 2016; Revised: 18 May 2017; Accepted: 4 June 2017
DOI:10.18057/IJASC.2018.14.1.5
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ABSTRACT
Presence of residual stresses can significantly influence the stiffness and fatigue life of steel structures. The extent of residual stress that develops in welded box-shaped sections at room temperature is extensively studied. However, there is limited data on the development of residual stresses after fire exposure. Such fire exposure has great influence on the residual stress distribution due to temperature induced plastic deformation and creep strains in steel. In order to provide benchmark data for the theoretical models and post-fire design recommendations, this paper presents results from an experimental investigation on the post-fire residual stresses in welded box-shaped sections. The tests are carried out by sectioning method, and two types of commonly used steels, mild Q235 steel with a nominal yield stress of 235MPa and high strength Q460 steel with a nominal yield stress of 460MPa are considered. The residual stresses were evaluated after exposing the specimens to 200℃, 400℃, 600℃ and 800℃and cooling down to room temperature. Data from the tests clear show that the residual stresses decrease significantly with increase in specimen temperature. Further, results from the tests are utilized to propose simplified relations for temperature induced residual stresses in welded box-section of Q235 and Q460 steels.
KEYWORDS
Residual stress, mild Q235 steel, high strength Q460 steel, high temperature, box-section
REFERENCES
[1] Tebedge, N. and Tall, L., “Residual Stress in Structural Steel Shapes — A Summary of Measured Values”, Fritz Laboratory Report, Lehigh University; 1973.
[2] Wang, W.Y., Liu, B. and Kodur, V.K.R., “Effect of Temperature on Strength and Elastic Modulus of High Strength Steel”, Journal of Materials in Civil Engineering, 2013, Vol. 25, No. 2, pp. 174-182.
[3] Wang, Y.B., Li, G.Q. and Chen, S.W., “The Assessment of Residual Stresses in Welded High Strength Steel Box Sections”, Journal of Constructional Steel Research, 2012, Vol. 76, pp.93-99.
[4] Ban, H.Y., Shi, G. and Shi, Y.J. et al., “Residual Stress of 460 MPa High Strength Steel Welded Box Section : Experimental Investigation and Modeling”, Thin-walled Structures 2013, Vol. 64, pp. 73-82.
[5] Li, T.J., Li, G.Q. and Wang, Y.B., “Residual Stress Tests of Welded Q690 High-strength Steel Box- and H-sections”, Journal of Constructional Steel Research, 2015, Vol. 115, pp.283-289.
[6] Ma, J.L., Chan, T.M. and Young, B., “Material Properties and Residual Stresses of Cold-formed High Strength Steel Hollow Sections”, Journal of Constructional Steel Research, 2015, Vol. 109, pp. 152-165.
[7] Khan, M., Paradowska, A. and Uy, B., et al., “Residual Stresses in High Strength Steel Welded Box Sections”, Journal of Constructional Steel Research, 2016, Vol. 116, pp. 55-64.
[8] Wang, W.Y., Li, G.Q. and Ge, Y., “Residual Stress Study on Welded Section of High Strength Q460 Steel after Fire Exposure”, Advanced Steel Constructions, 2015, Vol. 11, No. 2, pp. 150-164.
[9] GB/T 2975‐1998 Steel and Steel Products: Location and Preparation of Test Pieces for Mechanical Testing, Beijing: China Standard Press, 1998 (in Chinese).
[10] GB/T 228‐2002 Metallic Materials: Tensile Testing at Ambient Temperature, Beijing: China Standard Press, 2002 (in Chinese).
[11] Wang, W.Y., Liu, T.Z. and Liu, J.P., “Experimental Study on Post-fire Mechanical Properties of High Strength Q460 Steel”. Journal of Constructional Steel Research, 2015, Vol. 114, pp. 100–109.
[12] Zhang, Y.J., Zhu, Y., Zhao, S. and Hu, K.X., “Experimental Research on Mechanical Properties of Steel Cooled in Different Modes after High Temperature Treatment”, Structural Engineers, 2009, Vol. 25, No. 5, pp. 104–109 (in Chinese).
[13] Cruise, R.B. and Gardner, L., “Residual Stress Analysis of Structural Stainless Steel Sections”, Journal of Constructional Steel Research, 2008, Vol. 64, pp. 352–66.
[14] Tebedge, N., Alpsten, G. and Tall, L., “Residual-stress Measurement by the Sectioning Method”, Exp. Mech., 1973, Vol. 13, pp. 88–96.
[15] JGJ81-2002, Technical Specification for Welding of Steel Structure of Building, Beijing: China Architecture & Building Press, 2002 (in Chinese).
[16] Jiang, J., Chiew, S.P., Lee, C.K. and Tiong, P.L.Y., “An Experimental Study on Residual Stresses of High Strength Steel Box Columns”, Journal of Constructional Steel Research 2017, Vol. 130, pp. 12–21.