Experiments on hybrid tubular K-joints with circular braces and square chord in stainless steel

Ruan, Feng; Lin, Junwu; Mou, Xinling

doi:10.1016/j.engstruct.2019.04.005

Cited by 20 publications

(4 citation statements)

References 13 publications

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“…Therefore, the influence of the DC joints should be considered when evaluating the mechanical properties of the steel support system. Current research on joints mainly focuses on the joints of frame structures [8][9][10] and beam-column structures [11][12][13], such as K-joints [14,15], T-joints [16][17][18], and X-joints [19]. The research on DC joints is relatively minor.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Disconnectable Coupling Joints for Steel Bracing under Eccentric Load

Xie

Niu

et al. 2023

Applied Sciences

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Disconnectable coupling (DC) joints of steel bracing in foundation pit engineering are inevitably subjected to eccentric load, but their mechanical properties under eccentric load have not been thoroughly investigated. Based on full-scale test results of DC joints under axial compression, a validated finite element model was established. The bearing capacity and flexural performance of DC joints under eccentric load were studied systematically through a series of numerical simulations. These parameters included the length, width and height of the steel wedge; eccentricity; steel tube wall thickness; channel steel thickness and middle-rib plate height. Based on the numerical results, a modified moment–rotation model was established. The results obtained show that the numerical models accurately reflect the failure mode and the load-displacement curves revealed by the full-scale test. The bearing capacity and flexural performance of DC joints decreases with eccentricity, middle-rib plate height, and steel wedge height. The effect of eccentricity is the most significant. By contrast, the bearing capacity and flexural performance of DC joints increases with steel wedge length, steel wedge width, channel steel thickness and steel tube wall thickness. The modified moment–rotation model can describe the flexural performance of DC joints accurately under eccentric load.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Disconnectable Coupling Joints for Steel Bracing under Eccentric Load

Xie

Niu

et al. 2023

Applied Sciences

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“…Shao et al [7] and Dodaran et al [8] studied the structural performance of tubular K-joints at high temperature, and the results showed that the ultimate strength of the joints would decrease with increasing temperature. Feng et al [9,10] studied the effect of different parameters on the failure mode and bearing capacity of stainless steel tubular K-joints through experimental and numerical methods and proposed a formula to accurately predict the ultimate stress of tubular K-joints.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Mechanical Properties of Transmission Tower K‐Joints under Cyclic Loading

Zhang

Wang

et al. 2021

Shock and Vibration

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During the vibration of a transmission tower, the joints will be subjected to a reciprocating load. To obtain the accurate state of the transmission tower under the load, the mechanical properties of the joints under the vibration load must be considered. In this paper, the mechanical properties of typical K-joints in transmission tower structures are studied by numerical simulation. The failure mode of the K-joint under cyclic loading is also analyzed. The mechanical properties of the K-joint are discussed from the aspects of hysteretic characteristics, stiffness degradation, energy dissipation capacity, and ductility evaluation, and the influencing factors are discussed. The results show that the failure mode of the K-joint is related to the bolt grade and steel strength. When analyzing K-joints, the moment-rotation hysteresis curve should be combined with the realistic parameters of joints to consider the hysteretic behavior of the K-joint. The results provide a theoretical reference for the accurate modeling of transmission towers.

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“…Jusoh and Mandourah [ 12 ] established the FE model of gap K‐shaped joints under out‐of‐plane load and studied the influence of out‐of‐plane bending on the stress distribution of gap K‐shaped joints. Feng et al [ 13 ] tested 14 tubular K‐shaped joints made of AISI 304 austenitic stainless steel to obtain the failure mode and bearing capacity characteristics of the specimens, concluded that the load‐carrying capacity of the lap tubular K‐shaped joints was much greater than that of the gap K‐shaped joints, and pointed out that the design formula provided by CIDECT was generally not conservative. Lu et al [ 14 ] investigated the dynamic characteristics of K‐shaped joints on the offshore platform through experiments and numerical calculations.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical analysis for steel CHS K‐shaped joints stiffened with joint plates

Peng

Zhang

Cui³

et al. 2021

Structural Design Tall Build

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Summary K‐shaped intersecting joint is a common type of joint in steel tubular structures, and its bearing capacity has an important effect on the structural performance. The relevant literatures and design codes are still lacking of the calculation theory on bearing capacity of steel tubular K‐shaped joints stiffened with joint plates, by which the effect of well‐welded stiffeners could not be considered. Four steel tubular K‐shaped joints with or without stiffened plates are designed, and their tests and nonlinear FEAs are carried out to investigate the bearing capacity characteristics, failure modes, and the effectiveness of stiffeners. The tests shown that the stiffened plates can significantly improve the bearing capacities of K‐shaped joints, and the plates should be looked as joint plates to evaluate its contribution to intensity, not just as stiffeners. Then, the parameter simulations and their influences on bearing capacities of stiffened K‐shaped joints are performed, in which the different sizes of chords, braces, and stiffened plates are selected. Compared with the test and simulation results, the bearing capacity of tubular K‐shaped joints with no stiffened plates could be calculated well by the theory in the relevant design codes. Using the superposition method of bearing capacities, the annular strength model and the calculation theory of stiffened tubular K‐shaped joints are proposed, in which the coefficients of multiparameter model are determined through regression analysis. Lastly, the theoretical bearing capacities of stiffened K‐shaped joints are analyzed and have good agreements with the test values. It can be concluded that the proposed calculation theory can be used to calculate the bearing capacity of stiffened K‐shaped joints with plates.

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Experiments on hybrid tubular K-joints with circular braces and square chord in stainless steel

Cited by 20 publications

References 13 publications

Mechanical Properties of Disconnectable Coupling Joints for Steel Bracing under Eccentric Load

Mechanical Properties of Disconnectable Coupling Joints for Steel Bracing under Eccentric Load

Numerical Study on the Mechanical Properties of Transmission Tower K‐Joints under Cyclic Loading

Experimental and theoretical analysis for steel CHS K‐shaped joints stiffened with joint plates

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