Stress concentration factors in concrete-filled square hollow section joints with perfobond ribs

Jiang, Lei; Liu, Yongjian; Fam, Amir

doi:10.1016/j.engstruct.2018.12.016

Cited by 28 publications

(3 citation statements)

References 31 publications

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“…The FE modeling method used in this study is similar to the one adopted for 90° X-joints reported by Jiang et al (2019a). The general-purpose FE software ABAQUS was used to develop the models and to perform the elastic analysis.…”

Section: Fe Modelingmentioning

confidence: 99%

“…Liu et al (2017) performed experiments on CFSHS X-joints with PBLs to determine the SCFs at the intersection region. Jiang et al (2019a) derived parametric equations to predict the SCFs in CFSHS 90° T- and X-joints. However, the aforementioned research has not examined the SCFs for non-90° joints, which are often used in the truss bridges.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical analysis of the stress concentration factor for concrete-filled square hollow section Y-joints

Jiang

Liu

et al. 2019

Advances in Structural Engineering

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Previous studies have shown that the stress concentration factors for 90° square hollow section T- and X-joints can be significantly reduced by filling the chord with concrete and stiffening the chord with perfobond ribs. The current study examined stress concentration factors for non-90° (Y-type) joints. A total of 11 Y-joints were tested under axial tension, and the hot spot stresses were measured. The measured results were employed to evaluate the influence of design parameters on the stress concentrations. In addition, the measured results were used to evaluate finite element models. A parametric study was then undertaken using the finite element models to generate an extensive database of stress concentration factors and to develop parametric design equations to estimate the maximum stress concentration factors on the brace and the chord of concrete-filled square hollow section Y-joints with perfobond ribs. It was found that decreases of 13.7%–59.9% in the stress concentration factors occurred in concrete-filled square hollow section Y-joints stiffened by perfobond ribs relative to conventional square hollow section joints for different loading cases.

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Section: Fe Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of the stress concentration factor for concrete-filled square hollow section Y-joints

Jiang

Liu

et al. 2019

Advances in Structural Engineering

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“…Yang et al (2015) and Chen et al (2016) carried out investigations on SHS concrete-fillled double skin tube. Jiang et al (2019a), Jiang et al (2019b), Jiang et al (2019c) and Jiang et al (2020) carried out experimental investigations and numerical analysis on concrete-filled joints with perfobond ribs under different load cases. It was found that concrete filling the chords and the use of perfobond ribs stiffening reduced the SCFs in comparison to the empty SHS joints.…”

Section: Introductionmentioning

confidence: 99%

Experimental, numerical and parametric studies on stress concentration factors of T-joints under tension

Matti

Mashiri

2021

Advances in Structural Engineering

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This paper investigates the behaviour of square hollow section (SHS) T-joints under static axial tension for the determination of stress concentration factors (SCFs) at the hot spot locations. Five empty and corresponding concrete-filled SHS-SHS T-joint connections were tested experimentally and numerically. The experimental investigation was carried out by attaching strain gauges onto the SHS-SHS T-joint specimens. The numerical study was then conducted by developing three-dimensional finite element (FE) T-joint models using ABAQUS finite element analysis software for capturing the distribution of the SCFs at the hot spot locations. The results showed that there is a good agreement between the experimental and numerical SCFs. A series of formulae for the prediction of SCF in concrete-filled SHS T-joints under tension were proposed, and good agreement was achieved between the maximum SCFs in SHS T-joints calculated from FE T-joint models and those from the predicted formulae.

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Experimental and numerical investigation of vertical through‐plate for concrete‐filled steel tube column to H‐beam connections

Chang

Kim

Choi

et al. 2020

Structural Design Tall Build

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Summary The purpose of this study is to evaluate the structural behavior of concrete‐filled steel tube (CFT) column to H‐beam connections with vertical through‐plate through full‐scale experiments and examine retrofit methods using the finite element method to improve the connection performance. For this purpose, monotonic loading tests were performed on three full‐scale specimens with varying thickness of vertical through‐plate. The experiments showed that the specimens suffer from a brittle failure due to the stress concentrations and residual stresses at the welds before the beams reach their plastic moment capacity. A series of sectional analyses were conducted to evaluate the effects of the thermally induced residual stresses due to welding and then the strain concentrations in the welded connection were estimated by comparing the experimental maximum strain and the analytical mean strain values. Based on these results, a retrofit model for reinforcing a stiff plate on the upper flange of the beam was proposed and analyzed to reduce the stress concentrations in the welded connection. The results showed that using the proposed retrofit approach, the stress concentration at the connection between the vertical through‐plate and the top flange is reduced by 72%, and the strength of the connection is increased by 70%, which is 10% higher than the analytical plastic moment capacity of the beam.

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Stress concentration factors in concrete-filled square hollow section joints with perfobond ribs

Cited by 28 publications

References 31 publications

Experimental and numerical analysis of the stress concentration factor for concrete-filled square hollow section Y-joints

Experimental and numerical analysis of the stress concentration factor for concrete-filled square hollow section Y-joints

Experimental, numerical and parametric studies on stress concentration factors of T-joints under tension

Experimental and numerical investigation of vertical through‐plate for concrete‐filled steel tube column to H‐beam connections

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