Residual stresses in welded I-shaped sections fabricated from Q460GJ structural steel plates

Yang, Bo; Nie, Shidong; Xiong, Gang; Hu, Yi; Bai, Jubo; Zhang, Weifu; Dai, Guoxin

doi:10.1016/j.jcsr.2016.03.029

Cited by 42 publications

(11 citation statements)

References 9 publications

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“…Ban et al [22] and Yang et al [23] conducted a similar study with a larger range of width-to-thickness ratios on 460 MPa HSS welded I-shaped members and Q460GJ HSS welded I-shaped members, respectively. The residual stress distribution they obtained was found to be similar to that of mild steel with lower magnitudes and was related to section dimensions.…”

Section: Residual Stress Of Hssmentioning

confidence: 99%

Behavior of High Strength Steels under and After High Temperature Exposure: A Review

Wang¹,

Lui²

2017

J Steel Struct Constr

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Fire-resistant and high temperature behavior of high strength steels (HSS) for structural engineering applications has become an important research topic in recent years. In this paper, a succinct review of HSS behavior under and after high temperature exposure is provided. The review addresses the following aspects of HSS: (1) their mechanical properties under and after fire exposure, (2) residual stress in welded HSS sections, and (3) high temperature performance of HSS columns. Recent studies have demonstrated that different grades of HSS can exhibit noticeable differences in their mechanical properties under and after fire exposure, and different cooling methods could have an effect on the post-fire mechanical properties of HSS. Because current design standards for steel structures under elevated temperature were developed based on mild steel, care must be exercised when applying these standards to HSS as they are not necessarily applicable.

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Section: Residual Stress Of Hssmentioning

confidence: 99%

Behavior of High Strength Steels under and After High Temperature Exposure: A Review

Wang¹,

Lui²

2017

J Steel Struct Constr

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“…These three types of errors are the error from the difference between the arc length and the chord length, the error from the difference between the residual stress on the surface and the residual stress in the middle layer, and the error from disaccord between the axe of the drilled-hole and the cone-head of length measuring instrument. In Yang's paper [5], in terms of the engineering application, another efficient method to correct the effect of strip curve deformation, called straightening measurement, was proposed. The straightening measurement provided a concise way to obtain the residual strains because only the outer surface length of strips should be measured.…”

Section: Curve Deformation Correctionmentioning

confidence: 99%

“…The performance between HPS and NSS is different, and the results and conclusions of above literature can only play a reference role. In recent years, the study focus on the structural members fabricated from HSS plates with 460~800 MPa yield strength [5][6][7][8][9][10][11]. All of these residual stress tests involved plate thickness ranging from 6 mm to 21 mm, which do not cover thick-walled sections.…”

Section: Introductionmentioning

confidence: 99%

12.19: Experimental investigation on residual stresses in welded thick‐walled I‐shaped sections fabricated from Q460GJ structural steel plates

et al. 2017

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With the development of steel structures, a new type of high performance structural steel named by Q460GJ has been increasingly used in the modern steel constructions like the National Stadium of China in Beijing. Q460GJ structural steel is normally used in thick-walled section members because of the favourable material properties, such as good weldability, low thickness effect on yield strength and low yield ratio. However, only limited knowledge is available on the residual stress distribution of thick-walled section members fabricated from Q460GJ structural steel. Q460GJ structural steel has different mechanical characteristics and thermal properties from mild steel, both of which influence the formation of residual stress. This indicates that the available residual stress models of mild steel may not be appropriate for Q460GJ high performance steel. In this paper, residual stress in four thick-walled welded H-sections fabricated by Q460GJ structural steel were studied by experimental tests. Residual stress were measured by the sectioning method, and the variation of residual stress along steel plate thickness was then determined by slicing method. This study provides the magnitude and distribution of the longitudinal residual stress by both circular curve correction method and straightening measurement method. The effects on plate thickness and the interaction between flanges and webs are explored. Based on the statistical evaluation of the experimental results, a simplified multilayer residual stress model which is expected to use as initial imperfection in column analysis for residual stress in high performance steel is proposed.

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“…It was found that tensile residual stress at welding regions was less than actual yield strength of GJ steel (624 MPa), and compressive residual stress in flanges and webs decreased as the widththickness ratio increased. Yang et al [23] focused on the residual stress of flame-cut welded I sections made of 460 MPa GJ steel. 8 full scale I sections welded by flame-cut 460 MPa GJ steel plates including 5 doubly symmetric sections and 3 singly symmetric sections were tested.…”

Section: Introductionmentioning

confidence: 99%

Residual Stress of Welded I Sections Fabricated From High Performance Steel: Experimental Investigation and Modelling

2019

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An experimental study was presented to investigate the magnitude and distribution of residual stresses i n welded I sections fabricated from a new type of high performance steel with high strength as well as improved fire and corrosion resistance. The residual stress of three I sections with various width-thickness ratios was measured by using sectioning method and more than 2000 original readings were obtained. The effects of width-thickness ratio and interaction of residual stress in the flange and web were clarified. It was found that compressive residual stress was strongly correlated with sectional dimensions, while tensile residual stress at the weld region or flange edge was less correlated with them. In addition, no interaction between the residual stress in the flange and web was identified. Based on the test results, a distribution model of residual stress was proposed which could well represent the experimental results. Finally, the magnitude of residual stresses in welded I sections fabricated from this new type of high performance steel was compared with that of high strength steel.

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Residual stresses in welded I-shaped sections fabricated from Q460GJ structural steel plates

Cited by 42 publications

References 9 publications

Behavior of High Strength Steels under and After High Temperature Exposure: A Review

Behavior of High Strength Steels under and After High Temperature Exposure: A Review

12.19: Experimental investigation on residual stresses in welded thick‐walled I‐shaped sections fabricated from Q460GJ structural steel plates

Residual Stress of Welded I Sections Fabricated From High Performance Steel: Experimental Investigation and Modelling

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