Fatigue Behavior of Welded T-Joints with a CHS Brace and CFCHS Chord under Axial Loading in the Brace

Wang, Ke; Tong, Lewei; Zhu, Jun; Zhao, Xiao Ling; Mashiri, Fidelis Rutendo

doi:10.1061/(asce)be.1943-5592.0000331

Cited by 50 publications

(62 citation statements)

References 8 publications

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“…Substantial experiments (Liu et al, 2010;Packer, 1995;Sakai et al, 2004) and analysis of tubular structure indicate that the joints' strength and fatigue performance are governing factors in design (Hou et al, 2013;Liu et al, 2009;Machacek and Cudejko, 2009;Schumacher et al, 2009;Shi et al, 2012;Wang et al, 2013). In this paper, perfobond ribs (PBR) have been settled in chord joints for better performance than the hollow tubes.…”

Section: Introductionmentioning

confidence: 93%

“…Many experiments and researches have been done to find out the SCF of the hollow circular and rectangular tubular joint. The SCF of the circular concrete-filled tubular joint has been proved to be different from the non-filled joint (Wang et al, 2013). A finite element model is established to obtain the SCF of the concrete-filled joint (J2) and joint with PBR (J1), which could supply important data for the fatigue evaluation of the pilot composite bridge proposed by the author.…”

Section: Stress Concentration Factormentioning

confidence: 99%

See 1 more Smart Citation

Double-composite rectangular truss bridge and its joint analysis

Liu

Xiong

Luo

et al. 2015

Journal of Traffic and Transportation Engineering (English Edit

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Composite truss bridge Joint analysisPerfobond rib Concrete-filled tube a b s t r a c t This paper describes a novel composite tubular truss bridge with concrete slab and concrete-filled rectangular chords. With concrete slab plus truss system and joints reinforced with concrete and Perfobond Leiste rib, double composite truss bridge proved to be a fairly suitable solution in negative moment area. Perfobond Leiste shear connector (PBL) is widely implemented in the composite structure for its outstanding fatigue resistance. In this pilot bridge, Perfobond Leister ribs (PBR) were installed in the truss girder's joints, which played double roles as shear connector and stiffener. An erection method and overall bridge structural analysis were then presented. Typical joints in the pilot bridge were selected to analyze the effect of PBR. Investigation of the effect of PBR in concretefilled tubular joints was elaborated. Comparison has revealed that concrete-filled tubular joints with PBR have much higher constraint capability than joints without PBR. For rectangular tubular truss, the punching shear force of the concrete filled joint with PBR is approximately 43% larger than that of the joint without PBR. Fatigue performance of the joint installed with PBR was improved, which was found through analysis of the stress concentration factor of joint. The PBR installed in the joints mitigated the stress concentration factor in the chord face. Therefore, the advantages of this new type of bridge are demonstrated, including the convenience of construction using rectangular truss, innovative concept of structural design and better global and local performances. © 2015 Periodical Offices of Chang'an University. Production and hosting by Elsevier B.V. on behalf of Owner. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).

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Section: Introductionmentioning

confidence: 93%

Section: Stress Concentration Factormentioning

confidence: 99%

Double-composite rectangular truss bridge and its joint analysis

Liu

Xiong

Luo

et al. 2015

Journal of Traffic and Transportation Engineering (English Edit

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“…In previous research (Zheng et al 2018), three-dimensional finite element (FE) models of CFST T-joints with the brace in axial tension were developed in order to replicate the results of published experiments (Chen et al 2010;Chen 2011;Wang et al 2011;Xu et al 2015). After confirming the precision of these FE models, they were employed for parametric analysis to reveal the influences of certain non-dimensional parameters.…”

Section: Introductionmentioning

confidence: 99%

Extended Formulation of Stress Concentration Factors for CFST T-Joints

Jian

Nakamura

Ge³

et al. 2020

J. Bridge Eng.

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In previous research, the authors numerically investigated 212 finite element (FE) models of concrete-filled steel tubular (CFST) T-joints under axial force in the brace to derive formulae for stress concentration factors (SCFs). The formulations involve four non-dimensional parameters: diameter ratio, β; diameter to thickness ratio of chord, 2γ; thickness ratio, τ; and relative chord length, α. In the current study, the earlier formulation is extended to include four additional loading conditions: in-plane bending (IPB) in the brace, out-of-plane bending (OPB) in the brace, axial compression in the chord, and IPB in the chord. The validity of the new SCF formulae is demonstrated by comparing the SCFs obtained using the formulae with the results of numerical analysis.

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“…Over the years, various methods have been developed to evaluate the fatigue performance of steel tube joints. Among them, hot spot stress stands out as the most popular and successful strategy for fatigue calculated of welded tube joints [3][4][5][6][7][8][9][10][11][12][13][14][15]. Nevertheless, there is not yet a consensus on the effects of weld size on hot spot stress in the calculation of fatigue performance of the joints.…”

Section: Introductionmentioning

confidence: 99%

Effects of weld size on stress concentration factors of CHS-CFSHS joints

Yang

Tong

2018

Frattura Ed Integrità Strutturale

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This paper aims to disclose the effects of weld size on hot spot stress in the calculation of fatigue performance of the joints. For this purpose, the author explored the hot spot stress of CHS-CFSHS T-joints, which consists of circular hollow section (CHS) braces and concrete-filled square hollow section (CFSHS) chords. After reviewing the previous studies and the relevant specifications on weld size, the author probes into the effects of weld size on the stress concentration factor (SCF) of CHS-CFSHS joints via finiteelement analysis. The analysis show that the weld size directly affected the hot spot stress in both conditions, and the influence laws were largely the same; with the increase of weld size, the brace-side SCF plunged when the chordsize weld size remained the same, but the chord-side SCF changed slightly when the brace-side weld size was constant; the brace-side and chord-side SCF declined when the brace-side and chord-side weld sizes increased by the same amount. This research successfully determined the weld sizes that are consistent with the relevant specifications, and safe and simple to apply in actual engineering.

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Fatigue Behavior of Welded T-Joints with a CHS Brace and CFCHS Chord under Axial Loading in the Brace

Cited by 50 publications

References 8 publications

Double-composite rectangular truss bridge and its joint analysis

Double-composite rectangular truss bridge and its joint analysis

Extended Formulation of Stress Concentration Factors for CFST T-Joints

Effects of weld size on stress concentration factors of CHS-CFSHS joints

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