Wind and structural modelling for an accurate fatigue life assessment of tubular structures

Jia, Junbo

doi:10.1016/j.engstruct.2010.11.004

Cited by 18 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, in [15], the effects on the efficiency of turbine inability for optimal aligning to the wind direction (due to meandering wind caused by wakes) were examined. In addition, wind direction should be taken into consideration for the estimation of standard and design (extreme) wind loads to accurately assess the fatigue life of the offshore structure; see, for example, [17] and references therein. On these grounds, and for the sake of completeness of the presented wind climate assessment, wind direction characteristics (mean value and circular variance) are also included in the analysis.…”

Section: Introductionmentioning

confidence: 99%

Satellite-Based Offshore Wind Resource Assessment in the Mediterranean Sea

Soukissian

Karathanasi

Axaopoulos

2017

IEEE J. Oceanic Eng.

View full text Add to dashboard Cite

Identification of prominent sea areas for the efficient exploitation of offshore wind energy potential requires primarily the assessment and modeling of several aspects of the long-term wind climate. In this work, the offshore wind speed and wind direction climate of the Mediterranean Sea is analytically described, the corresponding offshore wind energy potential is estimated on an annual and seasonal basis, and candidate areas for potential offshore wind farm development are identified. The analysis is based on ocean surface wind fields obtained from the Blended Sea Winds product, provided by the U.S. National Oceanic and Atmospheric Administration (NOAA), from 1995 to 2014. The satellite data are evaluated with reference to buoy wind measurements in the Spanish and Greek Seas. Wind data analysis reveals areas in the western and eastern Mediterranean Sea with high mean annual wind speed combined with rather low temporal variability. The obtained results suggest that offshore wind power potential in the Mediterranean Sea is fairly exploitable at specific suitable locations, such as the Gulf of Lions (with mean annual wind power density up to ∼1600 W/m 2 ) and the Aegean Sea (with mean annual wind power density up to ∼1150 W/m 2 ), that are certainly worth further in-depth assessment for exploiting offshore wind energy. Finally, based on the available offshore wind resource potential and the water depth suitability, three specific sites (in the Gulf of Valencia and the Adriatic and Ionian Seas) are selected and the average wind power output for a specific wind turbine type is estimated.Index Terms-Blended sea winds, Mediterranean Sea, offshore wind energy, UpWind turbine.

show abstract

Section: Introductionmentioning

confidence: 99%

Satellite-Based Offshore Wind Resource Assessment in the Mediterranean Sea

Soukissian

Karathanasi

Axaopoulos

2017

IEEE J. Oceanic Eng.

View full text Add to dashboard Cite

show abstract

“…For example, Repetto [2][3][4] selected several types of mast structures, including telegraph poles and lamp-posts, and, by considering the changing wind speed and wind direction simultaneously, performed fatigue assessment of along-wind and crosswind response effect on structures from the frequency domain and time domain, respectively. Jia [5,6] presented a practical and efficient approach for calculating wind-induced fatigue of tubular structures and studied the effects of the wind direction and wind grid size on the high cycle fatigue of the structure. However, the fatigue assessment of welded joints based on nominal stress and hot spot stress methods cannot accurately consider the effect of the notch effect, which is a strong stress concentration near notch roots or notch toes.…”

Section: Introductionmentioning

confidence: 99%

Wind-Induced Fatigue Analysis of High-Rise Steel Structures Using Equivalent Structural Stress Method

Fang

et al. 2017

Applied Sciences

View full text Add to dashboard Cite

Abstract:Welded beam-to-column connections of high-rise steel structures are susceptive to fatigue damage under wind loading. However, most fatigue assessments in the field of civil engineering are mainly based on nominal stress or hot spot stress theories, which has the disadvantage of dependence on the meshing styles and massive curves selected. To address this problem, in this paper, the equivalent structural stress method with advantages of mesh-insensitive quality and capability of unifying different stress-life curves (S-N curves) into one is introduced to the wind-induced fatigue assessment of a large-scale complicated high-rise steel structure. The multi-scale finite element model is established and the corresponding wind loading is simulated. Fatigue life assessments using equivalent structural stress method, hot spot stress method and nominal stress method are performed, and the results are verified and comparisons are made. The mesh-insensitive quality is also verified. The results show that the lateral weld toe of the butt weld connecting the beam flange plate and the column is the location where fatigue damage most likely happens. Nominal stress method considers fatigue assessment of welds in a more global way by averaging all the stress on the weld section while in equivalent structural stress method and hot spot method local stress concentration can be taken into account more precisely.

show abstract

“…The effect of low-cycle fatigue of BRBs for three consecutive Level-2 earthquakes is investigated by Usami et al [21] and the BRBs' fatigue performance is found to be in an acceptable range. On the other hand, although the failure mechanism of wind-induced fatigue for steel buildings has been examined by researchers [26][27][28][29], there are few studies to discuss the BRBs under the combination of low-and high-cycle excitations in high-rise buildings.…”

Section: Introductionmentioning

confidence: 99%

Time-Dependent Damage Estimation of a High-Rise Steel Building Equipped with Buckling-Restrained Brace under a Series of Earthquakes and Winds

2021

View full text Add to dashboard Cite

This study investigates the cumulative damage of a 20-story high-rise steel building equipped with buckling-restrained braces (BRB) under the likely occurrence of earthquake and wind events in the design life of the building. The objective of this research is to introduce a method for evaluating the cumulative damage of BRBs under multi-hazard events that are expected to occur during the service life of a high-rise building in order to achieve a safer building. A methodology is proposed using a Poisson point process to estimate the timeline of earthquake and wind events, wherein the events are assumed to be independent in nature. The 20-story high-rise steel building with BRBs is designed according to the Japanese standard and analyzed using the finite element approach, considering nonlinearities in the structural elements and BRBs. The building is analyzed consecutively using the timeline of earthquakes and winds, and the results are compared with those under individual earthquakes and winds. In addition to the responses of the frame such as the floor displacement and acceleration, the damage of BRBs in terms of the damage index, the energy absorption, the plastic strain energy, and the maximum and cumulative ductility factor are evaluated. It is observed that the BRB’s fatigue life under multi-hazard scenarios is a multi-criteria issue that requires more precise investigation. Moreover, the overall building’s performance and BRB’s cumulative damage induced by the sequence of events in the design life of the building is significantly larger than that under an individual event.

show abstract

Wind and structural modelling for an accurate fatigue life assessment of tubular structures

Cited by 18 publications

References 22 publications

Satellite-Based Offshore Wind Resource Assessment in the Mediterranean Sea

Satellite-Based Offshore Wind Resource Assessment in the Mediterranean Sea

Wind-Induced Fatigue Analysis of High-Rise Steel Structures Using Equivalent Structural Stress Method

Time-Dependent Damage Estimation of a High-Rise Steel Building Equipped with Buckling-Restrained Brace under a Series of Earthquakes and Winds

Contact Info

Product

Resources

About