Joint Slip Formulation Based on Experimental Results in Wind Turbine Lattice Towers

Yaghoobi, Saleh; Shooshtari, Ahmad

doi:10.1061/(asce)st.1943-541x.0002023

Cited by 9 publications

(4 citation statements)

References 18 publications

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“…An et al conducted simulation and experimental research on the slippage of bolted joints in steel lattice transmission tower legs, and presented a simplified polynomial model of boltedslippage [8]. Yaghoobi and Shooshtari established the joint-slippage model of the joints in towers based on joint tests [9,10]. However, the equations of this model are only mathematically complex formulas, and most of the symbols in the equations have no specific mechanical meaning.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of leg member bolted joint slippage and its effects on mechanical behavior of lattice transmission tower

Yuan,

Zhang,

Wang

et al. 2024

Fourth International Conference on Mechanical Engineering, Intelligent Manufacturing, and Automation Technology (MEMAT 2023)

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Lattice transmission towers are typical spatial truss structure, which are commonly composed of equilateral angle steel members using bolts. Different from the bolted joints in beam-column connections of steel frame structures, bolted joints in lattice transmission tower are normally under great axial force and negligible bending moment. Joint slippage will affect the performance of the members under large axial force and even change the behavior of the lattice tower structure system. Therefore, it is very important to establish the joint slippage model for the analysis of lattice transmission towers. Firstly, this study investigates the process of joint slip through a series of tensile tests and analyses the influence of different structural parameters on the slip characteristics of bolted joints. Then, an exponential joint slippage model for the bolted joint of leg member used in steel lattice transmission power is established based on the experimental results. Finally, the finite element model of the transmission tower considering joint slip is established. The influence of different slip models on displacement and axial force of the transmission tower is analyzed.

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Section: Introductionmentioning

confidence: 99%

Experimental study of leg member bolted joint slippage and its effects on mechanical behavior of lattice transmission tower

Yuan,

Zhang,

Wang

et al. 2024

Fourth International Conference on Mechanical Engineering, Intelligent Manufacturing, and Automation Technology (MEMAT 2023)

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“…They simulated joint slip using contact and target elements available in the FE software ANSYS and found that bolt slip resulted in an increase of deformation while the effect of joint slip on the load carrying capacity is not significant. Subsequently, Jiang et al [12,13], Rao et al [6] and Yaghoobi and Shooshtari [14] investigated the influence of joint slip on the performance of lattice steel towers experimentally and numerically. In Jiang et al [12], the numerical simulation was conducted incorporating the Ungkurupanian's joint-slip model which was developed for galvanized bolted connections.…”

Section: Introductionmentioning

confidence: 99%

“…However, relatively large differences in the stiffness were found between the results obtained from the analytical method and the experiment. Yaghoobi and Shooshtari [14] proposed a joint-slip model for connections in wind turbine lattice towers based on connection test results. However, the equations defining the model had no direct relation to the physical behaviour of the joint.…”

Section: Introductionmentioning

confidence: 99%

Modeling of galvanized lattice steel structures incorporating the effect of joint slip

Zhan

et al. 2020

Journal of Constructional Steel Research

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The behaviour of galvanized lattice steel structures with joint slip is difficult to model accurately using either theoretical methods or numerical simulations. This paper proposes an accurate and efficient finite element (FE) model for the performance prediction of such structures including the effect of joint slip. In this study, an improved joint-slip model for bolted connections is developed on the basis of experimental results and Ungkurupanian's joint-slip model. Validation of the proposed model is performed utilizing results from full-scale structural testing. Compared with the conventional structural model and the structural model incorporating Ungkurupanian's joint-slip model, the proposed model has the highest accuracy in regard to predicted response. This newly developed model can be readily programmed into existing structural analysis and design software. The proposed model has the potential to improve reliability and safety of lattice structures in practical design.

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“…The slippage mechanism of the FRP-concrete bolted connections in the original paper is basically the same as that of steel connections connected by bolts. Since the slippage of steel bolted joints is substantially influenced by the bolt torque (Ungkurapinan 2000;Ungkurapinan et al 2003;Yaghoobi and Shooshtari 2018), similarly, the bolt torque has a significant influence on the load-slip responses of FRP-concrete connections. However, it is clear that the torque of 50 N · m applied to the HSBs is less than one-third of the torque values determined using Eqs.…”

mentioning

confidence: 99%

Discussion of “Bolted Shear Connection of FRP-Concrete Hybrid Beams” by Xingxing Zou, Peng Feng, and Jingquan Wang

Zhan

2020

J. Compos. Constr.

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The original paper proposes two trilinear models for fiber-reinforced polymer (FRP)-concrete connections based on the authors' test results. The influence of related parameters (bolt diameter, bolt-embedding length in concrete, FRP shear strength, etc.) is also analyzed. The discussers appreciate the authors' comprehensive work to develop the load-slip models for FRP-concrete connections. Some findings are interesting; however, they warrant further discussion. Experimental and Numerical SpecimenIn the original paper, the same torque value of 50 N · m was applied to the high-strength bolts (HSBs) with different diameters (namely, 12 and 14 mm). However, the torque value for HSBs with different diameters should be different according to Eqs. (1) and (2), which were recommended by Fastenal (2005) and according to the standard EN 14399-2 (CEN 2005), respectively, © ASCE 07020003-2 J. Compos. Constr. J. Compos. Constr., 2020, 24(3): 07020003 Downloaded from ascelibrary.org by 44.224.250.200 on 07/10/20.

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Joint Slip Formulation Based on Experimental Results in Wind Turbine Lattice Towers

Cited by 9 publications

References 18 publications

Experimental study of leg member bolted joint slippage and its effects on mechanical behavior of lattice transmission tower

Experimental study of leg member bolted joint slippage and its effects on mechanical behavior of lattice transmission tower

Modeling of galvanized lattice steel structures incorporating the effect of joint slip

Discussion of “Bolted Shear Connection of FRP-Concrete Hybrid Beams” by Xingxing Zou, Peng Feng, and Jingquan Wang

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