The slenderness effect on wind response of industrial reinforced concrete chimneys

Karaca, Zeki; Türkeli̇, Erdem

doi:10.12989/was.2014.18.3.281

Cited by 7 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the procedures of the cited standards are open to public, there is no need to define all of the symbols in the wind load calculations. One can obtain the details of the wind loading calculations in these studies [55][56][57][58][59]. Also, in these wind load calculations, basic wind speed is taken as 45 m/s.…”

Section: Calculation Of Wind Loadsmentioning

confidence: 99%

- Dynamic Seismic and Wind Response of Masonry Minarets

Türkeli̇

2020

Period. Polytech. Civil Eng.

View full text Add to dashboard Cite

Historical masonry structures i.e. minarets, towers, mosques or bastions are the heritage of past generations to the future societies as they carry the traces of the past communities. Among these structures, historical masonry minarets are one of the most generally constructed structure that reflects the beauty and magnificence of Islamic culture. Under severe winds and earthquakes, most of them were severely damaged or collapsed. Therefore, it is an inevitable duty for us to conduct and investigate their dynamic behavior under these vital actions of nature. In this study, the dynamic seismic and wind response of a historical minaret of İskenderpaşa Mosque that is selected from the technical literature is investigated by using different methods i.e. wind loading procedures of TS498, CICIND Model Code and Eurocode 1, the design spectrums of CICIND Model Code and Eurocode 8 for different types of soils, the time histories of real ground motions of Düzce and Kocaeli Earthquakes. At the end of the study, top joint displacements and stress distributions are obtained and interpreted. The findings of this study showed that the dynamic behavior of this historical masonry minaret is wind dominant (CICIND Model Code) and tensile and shear stress accumulations at the junction point of transition segment and cylindrical body of the minaret is the main reason for the collapse without showing any ductile behavior.

show abstract

Section: Calculation Of Wind Loadsmentioning

confidence: 99%

- Dynamic Seismic and Wind Response of Masonry Minarets

Türkeli̇

2020

Period. Polytech. Civil Eng.

View full text Add to dashboard Cite

show abstract

“…Traditional wind turbine models mostly assume that the tower is perfectly rigid and only consider the influence of dynamic blade deformation on aerodynamic loads. In fact, the aerodynamic loads of the blades make the deformation of a flexible tower more obvious (Türkeli, 2012), and the aerodynamic loads and dynamic responses of blades are in turn impacted by tower deformation. Hence, a coupled tower–blade model of a wind turbine system was established in this study.…”

Section: Dynamic Response Calculationmentioning

confidence: 99%

Wind‐induced fatigue of large HAWT coupled tower–blade structures considering aeroelastic and yaw effects

Wang

et al. 2018

Structural Design Tall Build

View full text Add to dashboard Cite

An efficient approach for predicting wind-induced fatigue in large horizontal axis wind turbine coupled tower-blade structures subject to aeroelastic and yaw effects is presented. First, aerodynamic loads under yaw conditions are simulated based on the harmonic superposition method and modified blade element momentum theory, in which wind shear, tower shadow, tower-blade interactions, aeroelastic, and rotational effects are taken into account. Then, a nonlinear time-history of wind-induced responses under simulated aerodynamic loads is obtained.Finally, based on these results, wind-induced fatigue damage and lifespan are predicted according to linear cumulative damage theory. For completeness, the influences of mean wind speed, aeroelasticity, and yaw angle on horizontal axis wind turbine fatigue life are discussed. The results indicate that the aerodynamic loads and residual fatigue life can be estimated accurately by the proposed model, which can be used to simulate the 3D wind fields of wind turbines under given wind conditions. The wind energy of the wind turbine blade is mainly concentrated at its edge and is weaker at the hub. Estimation of wind turbine fatigue life is therefore suggested to be based on the component with the shortest life, being the blade root. Furthermore, yaw conditions significantly shorten fatigue life and should not be ignored. Fatigue life is also rather sensitive to mean wind speed. KEYWORDS aeroelastic effect, fatigue cumulative damage, time-domain analysis, wind turbine coupled towerblade structures, wind-induced fatigue, yaw condition 1 | INTRODUCTIONLarge horizontal axis wind turbine (HAWT) tower-blade structures are subject to random wind loads. As such, they are a type of nonlinear coupled vibration system. [1][2][3] Natural wind fluctuations subject HAWTs to alternating stress states, which can cause fatigue damage to certain components. In the current design rules for the wind-resistant design of HAWTs, fatigue damage is calculated separately for the wind turbine's tower and its blades. The effect of random wind load on the blades is equivalent to a centralized static wind load on the tower top. [4] However, in the real world, wind turbine towers are in coupled tower-blade vibration states under random wind loads. Furthermore, due to the continuous variation of wind direction and high turbulence characteristics, the blades cannot always be kept parallel to the wind direction. Accordingly, the fatigue damage sustained by wind turbine coupled tower-blade structures in yaw conditions over the service period should not be ignored.In response to this problem, a dynamic stall prediction model was established and applied to wind turbine blades in the yaw condition. The basic principles and characteristics of the model have been discussed previously. [5] Greaves et al. [6] proposed a method for calculating windinduced fatigue damage over time for megawatt wind turbine blades while excluding the tower. The wind field of the blades was based on an auto-regressive method, and the fatig...

show abstract

“…al [22] presented numerical analysis of SSI of tall RC chimneys with piled raft foundation subjected to El Centro ground motion (1940) using FEM. Karaca and Türkeli [23] studied about the effect of slenderness on the wind response of industrial RC chimneys. Muvafık [24] dealt the field investigations and seismic analyses of a historical masonry brick minaret damaged during October 23 (Erciş) and November 9 (Edremit), 2011 Van R earthquakes in Turkey.…”

Section: Introductionmentioning

confidence: 99%

Effect of soil-structure interaction on the seismic behavior of RC chimneys

Türkeli̇

2019

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

View full text Add to dashboard Cite

RC chimneys are occupying the most important part of industrial factories that they are utilized for removing the waste and hot gases to the atmosphere. Nowadays, in order to meet the requirements of the codes related with the environment needs, the height of these slender structures increase that makes them more vulnerable to seismic loads. Therefore, the overall dynamic behavior of these tall and slender structures should be understood by also considering the effect of underlying soil. In this study, the dynamic seismic response of a model chimney was determined by considering openings, foundation and underlying soil separately. Findings of this study revealed that soil-structure interaction (SSI) is an important phenomenon that effects the dynamic response of reinforced concrete (RC) chimneys.

show abstract

The slenderness effect on wind response of industrial reinforced concrete chimneys

Cited by 7 publications

References 11 publications

- Dynamic Seismic and Wind Response of Masonry Minarets

- Dynamic Seismic and Wind Response of Masonry Minarets

Wind‐induced fatigue of large HAWT coupled tower–blade structures considering aeroelastic and yaw effects

Effect of soil-structure interaction on the seismic behavior of RC chimneys

Contact Info

Product

Resources

About