A load–deformation formulation for CHS X- and K-joints in push-over analyses

Qian, Xudong; Zhang, Yang; Choo, Yoo Sang

doi:10.1016/j.jcsr.2013.07.024

Cited by 21 publications

(8 citation statements)

References 8 publications

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“…Fig. 3a confirms the accuracy of the joint formulation against an experimentally measured load-deformation response [34] and the corresponding loading-deformation relationship computed from a large-deformation, elastic-plastic analysis for an X-joint [31]. subjected to symmetric brace loads [35].…”

Section: Load-deformation Response For Intact Jointssupporting

confidence: 73%

“…Qian et al [31] have proposed a dimensionless load-deformation relationship for circular hollow section X-and K-joints subjected to brace axial loads,…”

Section: Load-deformation Response For Intact Jointsmentioning

confidence: 99%

“…Qian et al [31]. Table 1 lists the geometry-dependent coefficients A 1 to A 3 for the CHS X-and K-joints.…”

Section: Load-deformation Response For Intact Jointsmentioning

confidence: 99%

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Translating the material fracture resistance into representations in welded tubular structures

Qian

Zhang²

2015

Engineering Fracture Mechanics

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Section: Load-deformation Response For Intact Jointssupporting

confidence: 73%

“…Qian et al [31] have proposed a dimensionless load-deformation relationship for circular hollow section X-and K-joints subjected to brace axial loads,…”

Section: Load-deformation Response For Intact Jointsmentioning

confidence: 99%

See 1 more Smart Citation

Translating the material fracture resistance into representations in welded tubular structures

Qian

Zhang²

2015

Engineering Fracture Mechanics

Self Cite

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“…Feng et al [29,30] investigated the performance of CFST joints under static loading. What's more, Lesani et al [31], Ju and Wang [32], Lvet al [33], Rong et al [34], Qian et al [35] performed a series of experimental and analytical investigations on the mechanical behaviour of tubular joints and developed different formulas for determining the ultimate strength of the tubular joints. Yin et al [36] conducted an experimental investigation on the hysteretic behavior of tubular N-joints.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Hysteretic Behavior of the Overlapped K-Joints with Concrete Filled in Chord

et al. 2019

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Due to the insufficient radial stiffness of the steel tube, the cracking of the weld and the plastic deformation of the string often occur under the cyclic loading of the hollow section pipe joint. In order to avoid such a failure, the overlapped K-joints were strengthened by pouring different concrete into the chords. Furthermore, to explore the detailed effect of filling different concrete in a chord on the hysteretic behavior of the overlapped K-joints, six full-scale specimens were fabricated by two forms, which included the circular chord and braces, the square chord and circular braces, and the low cyclic loading tests, which were carried out. The failure modes, hysteretic curves and skeleton curves of the joints were obtained, and the bearing capacity, ductility and energy dissipation of the joints were evaluated quantitatively. The results showed that plastic failure occurs on the surface of the chord of the joints without filling concrete, while the failure mode of the joints filled with concrete in the chords was the tensile failure of the chords at the weld of the brace toe, and the compressive braces had a certain buckling deformation; The strengthening measures of concrete filled with chord can effectively improve the mechanical properties of the K-joints, the delay of the plastic deformation of the chord, and improve the bearing capacity of the K-joints. Contrarily, the ductility coefficient and the energy dissipation ratio of K-joints decreased with the concrete filled in the chord. The hysteretic behavior of the K-joints with a circular chord and brace was slightly better than that of the K-joints with a square chord and circular brace, and the hysteretic behavior of the K-joints strengthened with fly ash concrete, which was better than that of the K-joints strengthened with ordinary concrete. The results of ANSYS (a large general finite element analysis software developed by ANSYS Company in the United States) analysis agreed well with the experimental results.

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“…Tubular joints are classified into spatial form and planar form according to their geometric forms. In 2012, Haque [1] et al conducted experimental research on 12 t-shaped and x-shaped intersecting nodes; Qian [2] et al proposed in 2013 the stress and deformation formulas of X -and k-shaped joints of round steel tubes applicable to the nappe analysis of steel truss structures. Subsequently, Qian [3] et al proposed a new fracture form to describe the ductile tear and brittle fracture failure of circular hollow section joints under monotonic load.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of complex tubular joints of Beijing New Airport Terminal C type column

et al. 2019

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The numerical simulation analysis of the two groups of fullscale complex tubular joints of the Beijing New Airport Terminal C type steel column under space static loading tests has been conducted by adopting software ABAQUS. The results obtained from the numerical simulation analysis consistent with those from the tests which enriched the research findings. Based on the research, mechanical performance of the joints has been carried out, the failure modes and ultimate bearing capacity of the joints with no stiffening ribs, three stiffening ribs and five stiffening ribs has been obtained. The numerical simulation results showed that, the bearing capacity of the joints without stiffening ribs were relatively low, the plastic failure of the main pipe was the major form of the destruction and the safety performance were too poor to meet the actual needs of the project. The bearing capacity of the joints significantly improved with the stiffening ribs set inside and the destruction changed to the connection of the main tubular and the branch, which means that the stress of the joints has been obviously improved by the setting of the stiffening ribs and was able to meet the needs of Beijing New Airport Terminal C type column. Through the comparative analysis of the stiffening ribs setting, it can be found that the bearing capacity of the joints were similar between the three and five stiffening ribs, considering the construction difficulty and economic benefits, three stiffening ribs has been selected as the final optimization result.

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A load–deformation formulation for CHS X- and K-joints in push-over analyses

Cited by 21 publications

References 8 publications

Translating the material fracture resistance into representations in welded tubular structures

Translating the material fracture resistance into representations in welded tubular structures

Experimental Study on Hysteretic Behavior of the Overlapped K-Joints with Concrete Filled in Chord

Numerical simulation of complex tubular joints of Beijing New Airport Terminal C type column

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