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Wind forces on and excitation of a 130-m concrete chimney
A slight indication of increasing roughness with increasing wind speed is observed. Introduction During the period 1969--1973, a 130-m concrete chimney has ...
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Measurements of wind-induced vibrations on a concrete chimney
Measurements of wind velocity were made at three different levels at 35 m, 130 m and 180 m ..... Wind forces on and excitation of a 130-m concrete chimney.
[ 1-s2.0-0167610575900197-main.pdf?_tid=045ce3ce-a526-11e3-8671-00000aab0f27&acdnat=1394107025_296980f2067bb38841ac12918ac1a64b - Read/Download File

Acrosswind Response of Reinforced Concrete Chimneys
The acrosswind (lift) force is recognized as a significant source of wind excited .... models of 130 m and 180 m chimneys (Christensen, 1978; Mueller & Niesser, 1976 .... a model to predict the response of chimneys to vortex induced excitation.
[ (1992)Acrosswind_response_of_reinforced_concrete_chimneys.pdf - Read/Download File

Full text - International Journal of Engineering Innovation and
Student M.Tech(R) at SVNIT, Surat ... reinforced concrete chimneys has been on an increase in ..... Christensen Ole, “Wind forces on and excitation of a 130m.
[ IJEIR_1523_Final.pdf - Read/Download File

Wind Loading for the Design of the Solar Tower - Ruhr-Universität
Keywords: solar chimney, wind speed, wind turbulence and wind load up to ... m in height and 130 m in diameter up to 1500 m in height and a diameter of 280 ... from reinforced concrete as a cylindrical shell with a ..... 3.3 Vortex excitation.
[ solartower.pdf - Read/Download File

Effect of Wind Loading on Analysis of Natural Draught Hyperbolic
effect of a chimney above the packing to induce air flow up through the packing in ... reinforced concrete is produced by wind forces apart from some cases ... active zones are routinely analysed for earthquake excitation. Thus the .... diameter at respective levels. Item. Level(m). Inside Diameter (m). Sill. 0. 130. Throat. 129.
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Solar updraft tower - TU Delft Repositories
chimney schematise it as a reinforced concrete cylindrical shell, with the bottom half shaped like a ... This leads to pulsating excitation forces in the across-wind ...
[ stevenvaneck_thesis_final.pdf - Read/Download File

WIND LOADING HANDBOOK - [email protected]
1.6 Design wind pressures, forces and load cases. 16. 1.6.1 Design wind .... 5.4.1 Cross-wind excitation due to incident turbulence. 5.4.2 Wake excitation.
[ 30502 Holmes et al 2012 Front Pages.pdf - Read/Download File

dynamic analysis and structural design of turbine generator
Jun 20, 2005 ... Response spectrum analysis gives estimation of internal forces and displacements due to seismic excitation. ... is about 1.5 m and base mat thickness is 2.0 m (Fig. ... been developed after the concrete chimney ANSYS-based CAD [ 4]. ... of Israeli Standard [11], when seismic and wind loads are defined by ...
[ Dynamic analysis and structural design of turbine generator foundations.pdf - Read/Download File

Vortices and tall buildings: A recipe for resonance
and should the building fail due to the forces exerted on it, life would be in peril. How ... buildings mitigate against the effect of winds that routinely .... Ucrit = 36 m/ s, or 130 km/h. That is a high ... much steel and concrete as to be costly and impractical. Therefore ... to vortex excitation is to draw the energy out of the building's.
[ math654_irwin.pdf - Read/Download File

Download (2585Kb) - White Rose Research Online
Jan 16, 2007 ... performance monitoring of tuned mass damper system for a 183 m reinforced ... Keywords: Chimney concrete wind vortex shedding damping ... chimneys due to normal wind excitation (Jeary, 1974) via autocorrelation functions. ... chimney, a study of wind loads and interference effects (Galsworthy and ...
[ Brownjohn_10764.pdf - Read/Download File

Dynamic Behaviour under Wind Loading of a 90 m Steel Chimney
Dynamic Behaviour under Wind Loading of a 90 m Steel Chimney. Dynamic ..... 3.5.1 Wind pressure and top deflection range, anthill diagrams............................. 80 ...... concrete chimney and the new steel chimney are drastically different.
[ S01041-Report.pdf - Read/Download File

Publications - Christian Bucher - TU Wien
“Reliability of R/C Chimneys Considering Nonlinear Material Damping”. In: Journal of ... “Inuence of Mean Wind Speed, Surface Roughness and Structural ...
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A time-domain model for predicting aerodynamic loads on a slender
127. 7.1 Summary. 127. 7.2 Conclusions. 128. 7.3 Recommendations. 130 .... Critical wind speed (at 33ft) to induced vortex shedding vibration on .... fatigue failure due to vortex shedding excitation, these models still need ..... Alpsten [81] investigated the structural behavior of a 90 m high steel chimney and summarized.
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Vibration-based monitoring of civil infrastructure: challenges and
This is mostly due to spurious causes, e.g. lack of excitation, directionality of excitation, gaps in .... 183 m chimney: reinforced concrete windshield with inner refractory lining sleeves ... Provided evaluation of wind and seismic loads relevant to code development, assessment of ..... J Eng Mech ASCE 130(1):1–2 CrossRef. 8.
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Loads in SCIA Engineer - SCIA Engineer Help
May 27, 2016 ... Elongation(inm/m') .... 130. Combinationrulesfor Footbridges: 132. Combinationrulesfor ..... The real wind pressure is defined by wind curve specified in the ..... definition of logarithmicdecrement, frequencyof excitation impulse in Hzand ... in appropriate module for design and checking (steel, concrete, etc.
[ Loads_enu.pdf - Read/Download File

Wind turbines and seismic hazard: a state-of-the-art review - DTU Orbit
May 27, 2016 ... Most of the times, wind forces subjected to the supporting tower and .... earthquake excitation may be detrimental for the entire integrity of the .... [35] to study the seismic response of a 37 m high wind turbine's ..... and the analysis results indicated excessive tensile stresses in the concrete foundation near the.
[ Katsanos_et_al_2016.pdf - Read/Download File

Amplitude Dependency of Damping in Buildings and Critical - ctbuh
in an increase in the corresponding wind force spectrum, and can potentially ... long-lasting excitation, static components, and softening phenomena. ..... the natural frequency of the chimney were estimated at ... first floor are of pre-cast concrete. The walls ..... those ratios for buildings with heights ranging from 10 m to 200 m ...
[ 2000 - Read/Download File

Energy Conversion: Chapter 8
Dec 19, 2000 ... energy conversion devices, can be an eye-opener to those students who need concrete ..... Values of temperature and pressure are characteristics that identify ... we observe the temperature and pressure of such a system, we can identify when ..... Moisture fraction, M, is defined as ... Excitation of molecular.
[ Energy_Conversion.pdf - Read/Download File

Download PDF - Springer
Oct 17, 2013 ... to control wind forces in wind turbines and suggest it might be applicable to ... a system is effective for chimneys and offshore wind tur- bines. ... and a 107-m high RC tower subjected to seismic excitations. ..... tural vibration control of tall buildings under seismic excitation. ... J Struct Eng 130(1):120–127. 42.
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