Elastoplastic large deformation analysis of a lattice steel tower structure and comparison with full-scale tests

Lee, Phill-Seung; McClure, Ghyslaine

doi:10.1016/j.jcsr.2006.06.041

Cited by 84 publications

(46 citation statements)

References 7 publications

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“…These structures are suited for weight minimisation and for reducing wind resistance. For structural design and analysis of lattice towers, the current industrial tools are finite element (FE) software packages combined with established design codes [3][4][5][6][7][8][9][10]. The majority of the work in published literature with regard to lattice towers concerns the analysis of electricity transmission towers [11][12][13][14][15][16][17][18][19].…”

Section: Lattice Towersmentioning

confidence: 99%

“…The latter is most common for towers which are fabricated from members having an angle cross section using a single bolt or welding without the use of a gusset plate. This eccentricity in the connection induces a secondary bending moment at the joint end of the members [6,27]. Results from actual full-scale tower tests indicate that linear static analysis is not consistent in modelling the behaviour of the structure.…”

Section: Lattice Towersmentioning

confidence: 99%

“…Results from actual full-scale tower tests indicate that linear static analysis is not consistent in modelling the behaviour of the structure. It is also reported that bending stresses in the members, which initially were assumed to be negligible, can be as high as the axial stresses [27][28][29][30][31]. Ref.…”

Section: Lattice Towersmentioning

confidence: 99%

“…Ref. [27] gives a number of reasons why the pin joint assumption does not hold for real towers. One of the main reasons is due to the main legs normally being continuous through the joint and due to the fact that, usually, more than one bolt is used in the connections, so that they should be assumed to be semi-rigid and not pinned.…”

Section: Lattice Towersmentioning

confidence: 99%

See 3 more Smart Citations

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Axisa

Muscat

Sant

et al. 2017

Int J Energy Environ Eng

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This paper deals with a limit load assessment and preliminary experimental testing of a lattice-type steel tower used to support a newly designed, prototype small wind turbine having nine blades and a rotor diameter of 3.4 m. Small wind turbine and structural engineering codes of standards were followed with the purpose of implementing a system that meets European Union countries' legislation. The supporting lattice tower structure was subjected to a full-scale load test. This test verified that the structure can withstand the design loads. The finite element software ANSYS Mechanical was used to model and analyse the actual structure, and to determine the possible failure modes and their associated load levels. The most probable mode of failure for such a structure was found to be elastic buckling of the main corner posts. A number of finite element lattice tower models utilising different modelling strategies and solution methods are presented and analysed. The paper highlights the importance of using non-linear analyses as opposed to linear analyses and gives recommendations on the most reliable available modelling technique. Computational analyses' results are compared with measurements from a full-scale test on the tower structure.

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Section: Lattice Towersmentioning

confidence: 99%

Section: Lattice Towersmentioning

confidence: 99%

Section: Lattice Towersmentioning

confidence: 99%

Section: Lattice Towersmentioning

confidence: 99%

See 2 more Smart Citations

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Axisa

Muscat

Sant

et al. 2017

Int J Energy Environ Eng

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show abstract

“…Albermani and Kitipornchai [11] presented a nonlinear analytical method, with considering both material and geometric nonlinearity to predict latticed tower failure. The advanced models were created by Lee P. S., McClure G. [12] to obtain accurate predictions of latticed steel towers using finite element analysis. A simplified 2D model using a simple locking system between 'locking stripes' on the component members was developed by Yan Zhuge et al [5] to model the multi-panel retrofitted towers.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on behavior of Q420 dual-angle steel with cruciform section under dynamic compression

Li¹,

Cao²,

Zhang³

et al. 2017

J. vibroeng.

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Abstract. In order to investigate the mechanical behavior and deformation characteristic of dual-angle steel with cruciform section, this paper presents a series of dynamic compression tests performed on the compound members. The specimens are designed with different width-to-thickness ratios and slenderness ratios. The cruciform plates are used as interconnectors between two components, with three or four bolts connecting each face and angle limb. The experimental results indicate that the failure mode of core members is a mixture of flexural buckling and local instability. The internal force distribution of two sub-members is asymmetric, with the ratios varying from 1.04 to 1.31. A simplified finite element model is then developed to stimulate their experimental behavior. The analytical model is verified by experimental results and proved to be precise and reliable. Moreover, the theoretical analysis is performed to investigate the critical stresses due to different buckling modes. The bearing capacity predicted by Chinese standard is proved to be not conservative, on this basis, a modified design approach is proposed, and the design capacities fit the test data well.

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Assessment of the Elastoplastic Nonlinear Static and Dynamic Behavior of Guyed Antenna Towers Subjected to Cable Rupture

2022

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Cable‐stayed antenna towers are slender structures composed of a central mast and several cable levels and exhibit a highly non‐linear behavior under static and dynamic loads, due to the mast‐cable interaction and the tower height. Many accidents reported in literature are due to cable rupture. Thus, the aim of the present work is to study the effect of cables rupture and plasticity on the load capacity, stability and nonlinear oscillations of a cable stayed tower considering the influence of both geometric and material nonlinearity. For this, finite element models of cable‐stayed towers with two levels of pre‐tensioned cables are developed, considering both fan and parallel cable distributions. Initially, the linear behavior of the structure is evaluated through the natural frequencies and critical loads. Next, the non‐linear equilibrium paths of each model are obtained, applying the concept of modal imperfection. Finally, forced free and damped vibration analyses are performed. For this, time responses, phase plane projections, Fourier transforms and spectrographs are used. The results confirm and quantify the strong influence of the loss of one or more cables on the response of the guyed tower.

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Elastoplastic large deformation analysis of a lattice steel tower structure and comparison with full-scale tests

Cited by 84 publications

References 7 publications

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Experimental research on behavior of Q420 dual-angle steel with cruciform section under dynamic compression

Assessment of the Elastoplastic Nonlinear Static and Dynamic Behavior of Guyed Antenna Towers Subjected to Cable Rupture

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