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Power fluctuation and power loss of wind turbines due to wind shear and tower shadow

Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 321-332 doi: 10.1007/s11465-017-0434-1

Abstract: This study investigates the effects of wind shear and tower shadow on power output in terms of powerFirst, wind speed models, particularly the wind shear model and the tower shadow model, are describedPower fluctuation and power loss due to wind shear and tower shadow are analyzed by performing theoreticalshear.shear and tower shadow.

Keywords： wind turbine     wind shear     tower shadow     power fluctuation     power loss    

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Nonlinear dynamics of a wind turbine tower

A. GESUALDO, A. IANNUZZO, F. PENTA, M. MONACO

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 342-350 doi: 10.1007/s11465-019-0524-3

Abstract: The recent proliferation of wind turbines has revealed problems in their vulnerability under differentsite conditions, as evidenced by recent collapses of wind towers after severe actions.The procedure’s model is applied to a wind turbine tower subjected to inertial forces generated by harmonicground acceleration, and failure is assumed to depend on the formation of shear hinges.

Keywords： nonlinear dynamics     plastic shear failure     modal approximation     time history    

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Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue

Yun-Shuai SU, Shu-Rong YU, Shu-Xin LI, Yan-Ni HE

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 4,   Pages 434-441 doi: 10.1007/s11465-018-0474-1

Abstract: Wind turbine gearbox bearings fail with the service life is much shorter than the designed life.WEAs were compared with adiabatic shear bands (ASBs) generated in the high strain rate deformation in

Keywords： rolling contact fatigue (RCF)     white etching area (WEA)     white etching crack (WEC)     adiabatic shear band    

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Modeling of shear walls using finite shear connector elements based on continuum plasticity

Ulf Arne GIRHAMMAR, Per Johan GUSTAFSSON, Bo KÄLLSNER

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 143-157 doi: 10.1007/s11709-016-0377-3

Abstract: behavior of the sheathing-to-framing joints has a significant impact on the structural performance of shearThis paper is focused on the finite element modeling of shear walls.The purpose is to present a new shear connector element based on the theory of continuum plasticity.Load-displacement curves for shear walls are calculated using the shear connector model and they are

Keywords： shear walls     wall diaphragms     finite element modelling     plastic shear connector     analytical modelling     experimental    

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Nonlinear numerical simulation of punching shear behavior of reinforced concrete flat slabs with shear-heads

Dan V. BOMPA, Ahmed Y. ELGHAZOULI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 331-356 doi: 10.1007/s11709-019-0596-5

Abstract: paper examines the structural response of reinforced concrete flat slabs, provided with fully-embedded shear-headsassessments enable the identification of three modes of failure as a function of the interaction between the shear-headPractical recommendations are also provided for the design of shear-heads in RC slabs, including theshown to offer a more reliable design approach in comparison with existing methods for all types of shear-heads

Keywords： non-linear numerical modelling     concrete damage plasticity     RC flat slabs     shear-heads     punching shear    

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Behaviour of self-centring shear walls——A state of the art review

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 53-77 doi: 10.1007/s11709-022-0850-0

Abstract: post-tensioning (PT) in structural walls has led to the development of advanced self-centring (rocking) shearconcrete, masonry, and timber), reduced residual drifts, and little damage upon extreme seismic and windsliding, confinement, seismic performance factors, PT loss, PT force range and residual drifts of shearThe established database was then used to review shear walls’ configurations, material, and componentsThe behaviour of concrete, masonry and timber shear walls were compared and critically analysed.

Keywords： self-centring shear walls     rocking walls     energy dissipation     seismic performance factors     PT loss     residual    

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Prediction of the shear wave velocity

Amoroso SARA

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1,   Pages 83-92 doi: 10.1007/s11709-013-0234-6

Abstract: The paper examines the correlations to obtain rough estimates of the shear wave velocity from non-seismic

Keywords： horizontal stress index     shear wave velocity     flat dilatometer test     cone penetration test    

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On braced trapezoidal corrugated steel shear panels: An experimental and numerical study

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 396-410 doi: 10.1007/s11709-023-0934-5

Abstract: system consisting of a combination of braces and steel infill panels called the braced corrugated steel shearSubsequently, a relationship was established to estimate the buckling shear strength of the system withoutThe results obtained from the parametric study indicate that the corrugated steel shear panel (CSSP)

Keywords： trapezoidal corrugated plate     steel shear panel     braced steel shear panel     experimental study     buckling    

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Experimental study on shear behavior of reinforced concrete beams with web horizontal reinforcement

Dong XU,Yu ZHAO,Chao LIU

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 325-336 doi: 10.1007/s11709-014-0080-1

Abstract: In determining the shear capacity of reinforced concrete beams, current codes do not provide any calculationThe primary design variables are the shear-span-depth ratio, different reinforcement ratio of stirrupsIt was found that web horizontal reinforcement can increase the shear capacity of the beams and restrainTest results are very valuable, as very few references of shear tests can be found focusing on the effectof web horizontal reinforcement on the shear capacity of the beams.

Keywords： reinforced concrete beam     shear strength     web horizontal reinforcement     experiments    

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Effect of loading rate on shear strength parameters of mechanically and biologically treated waste

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1595-7

Abstract:

● Mechanical behavior of MBT waste affected by loading rate was investigated.

Keywords： Mechanically and biologically treated waste     Landfill     Triaxial test     Loading rate     Axial strain     Shear    

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Micromixing performance of the teethed high shear mixer under semi-batch operation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 4,   Pages 546-559 doi: 10.1007/s11705-021-2069-3

Abstract: Herein the structural and operating parameters of the teethed high shear mixers were adjusted to studythat the rising of the rotor speed and the number of rotor teeth, the decrease of the width of the shearevolution of the flow pattern and turbulent energy dissipation rate of the semi-batch operated high shearwhich can provide valuable guidance on the design and optimization of the semi-batch operated high shear

Keywords： high shear mixer     semi-batch operation     micromixing performance     Villermaux/Dushman system     segregation    

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Predicting the capacity of perfobond rib shear connector using an ANN model and GSA method

Guorui SUN; Jun SHI; Yuang DENG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 10,   Pages 1233-1248 doi: 10.1007/s11709-022-0878-1

Abstract: A connector is an important part of a composite beam, and its shear strength can have a significant impactIn this paper, the shear performance of perfobond rib shear connectors (PRSCs) is predicted based onvariables were based on different empirical formulas and the output variables were the corresponding shearresults predicted by the ANN models and empirical equations were compared, and the factors affecting shearforce between steel plate and concrete has the least sensitivity to shear strength.

Keywords： perfobond rib shear connector     shear strength     ANN model     global sensitivity analysis    

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Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2,   Pages 306-325 doi: 10.1007/s11709-022-0890-5

Abstract: studied the effect of uncertainty and random distribution of concrete strength in beams failing in shearComparative studies were conducted for both shear- and flexure-deficit beams under four-point loadingThe scatter of random load-capacities was higher in flexure (range: 0.680–0.990) than that of shear (

Keywords： lattice modeling     shear failure     flexural failure     uncertainty     deficiency     numerical simulation    

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Fatigue shear performance of concrete beams reinforced with hybrid (glass-fiber-reinforced polymer+ steel

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 576-594 doi: 10.1007/s11709-021-0728-6

Abstract: However, the fatigue shear performance of such beams is unclear.Therefore, beams with hybrid longitudinal bars and hybrid stirrups were designed, and fatigue shear testsFor specimens that failed by fatigue shear, all the glass-fiber-reinforced polymer stirrups and someGlass-fiber-reinforced polymer stirrups were subjected to fatigue tension and shear, and failed owingto shear.

Keywords： fatigue     shear     hybrid stirrups     hybrid reinforcement     fiber-reinforced polymer    

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A simple method for evaluating liquefaction potential from shear wave velocity

Lianyang ZHANG,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2,   Pages 178-195 doi: 10.1007/s11709-010-0023-4

Abstract: The simplified procedure using shear wave velocity measurements is increasingly used to evaluate theThis paper develops a simple method for evaluating the liquefaction potential of soils from shear waveThe factors considered are the earthquake magnitude, the vertical effective overburden stress, the shearThe most important factor has been identified as the shear wave velocity.Neither stress-correction of shear wave velocity nor calculation of cyclic shear stress as in the simplified

Keywords： liquefaction     earthquake     simple method     shear wave velocity     case history introduction    

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Title Author Date Type Operation

Power fluctuation and power loss of wind turbines due to wind shear and tower shadow

Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU

Journal Article

Nonlinear dynamics of a wind turbine tower

A. GESUALDO, A. IANNUZZO, F. PENTA, M. MONACO

Journal Article

Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue

Yun-Shuai SU, Shu-Rong YU, Shu-Xin LI, Yan-Ni HE

Journal Article

Modeling of shear walls using finite shear connector elements based on continuum plasticity

Ulf Arne GIRHAMMAR, Per Johan GUSTAFSSON, Bo KÄLLSNER

Journal Article

Nonlinear numerical simulation of punching shear behavior of reinforced concrete flat slabs with shear-heads

Dan V. BOMPA, Ahmed Y. ELGHAZOULI

Journal Article

Behaviour of self-centring shear walls——A state of the art review

Journal Article

Prediction of the shear wave velocity

Amoroso SARA

Journal Article

On braced trapezoidal corrugated steel shear panels: An experimental and numerical study

Journal Article

Experimental study on shear behavior of reinforced concrete beams with web horizontal reinforcement

Dong XU,Yu ZHAO,Chao LIU

Journal Article

Effect of loading rate on shear strength parameters of mechanically and biologically treated waste

Journal Article

Micromixing performance of the teethed high shear mixer under semi-batch operation

Journal Article

Predicting the capacity of perfobond rib shear connector using an ANN model and GSA method

Guorui SUN; Jun SHI; Yuang DENG

Journal Article

Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling

Journal Article

Fatigue shear performance of concrete beams reinforced with hybrid (glass-fiber-reinforced polymer+ steel

Journal Article

A simple method for evaluating liquefaction potential from shear wave velocity

Lianyang ZHANG,

Journal Article