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B.V.Harsoda General Sponsor
Joined: 19 Jan 2009 Posts: 2329 Location: RAJKOT,GUJARAT, INDIA
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Posted: Tue Nov 20, 2012 1:38 pm Post subject: Wind effects on tall building frames |
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Wind Effects on tall building frames-influence of dynamic parameters
B. Dean Kumar
1
and B.L.P. Swami
2
1
Department of Civil Engineering, JNTU College of Engineering, Hyderabad-500085, India
2
Department of Civil Engineering, Vasavi College of Engineering, Ibrahim Bagh-500031, India
deankumar@yahoo.com
Abstract
In the recent past many tall buildings and high rise towers are being built in India. The impact of wind loads are to be considered for the design of these towers on par with steel towers like transmission towers, microwave towers, cooling towers and very tall multistoried building towers. Several failures of structures have occurred in India due to wind. The IS 875 Part-3 deals with wind loads on different types of structures. In the present work,the Gust Effectiveness Factor Method is used ,which is more realistic particularly for computing the wind loads on flexible tall slender structures and tall building towers. In this paper frames of different heights are anlaysed and studied
Source Link:-
http://www.indjst.org/archive/vol.3.issue.5/may10deankumar-18.pdf
Regards,
Er. B. V. Harsoda
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thirumalaichettiar Silver Sponsor
Joined: 26 Jan 2003 Posts: 3554
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Posted: Tue Nov 20, 2012 2:54 pm Post subject: |
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Dear Er.Harsoda,
May I request you to place all these references under BOOKS and References so that it will be put under one head so that any one wishes to read or study go in continuously without searching the links.
If it is possible do it>
T.RangaRajan.
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B.V.Harsoda General Sponsor
Joined: 19 Jan 2009 Posts: 2329 Location: RAJKOT,GUJARAT, INDIA
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Posted: Tue Nov 20, 2012 6:21 pm Post subject: |
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Dear Sir,
I have found network problem in Reply so I have reply as new topic earlier.
http://www.sefindia.org/forum/viewtopic.php?t=13170
Regards,
Er. B. V. harsoda
thirumalaichettiar wrote: | Dear Er.Harsoda,
May I request you to place all these references under BOOKS and References so that it will be put under one head so that any one wishes to read or study go in continuously without searching the links.
If it is possible do it>
T.RangaRajan. |
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Dr. N. Subramanian General Sponsor
Joined: 21 Feb 2008 Posts: 5538 Location: Gaithersburg, MD, U.S.A.
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Posted: Wed Nov 28, 2012 8:05 pm Post subject: Effect of Hurricane Ike on 75-story JP Morgan Chase Tower |
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Effect of Hurricane Ike on 75-story JP Morgan Chase Tower, formerly Texas Commerce Tower, at 600 Travis Street in downtown Houston, Texas.
On September 13, 2008, many of the tower's windows were blown out as Hurricane Ike moved through the area leaving desks exposed, metal blinds hanging in a twisted heap and smoky black glass covering the streets below. Police were forced to cordon off the area due to the amount of debris lying in the streets.
At first, it was speculated that the glass came off the building due to impact from debris or due to high-speed winds in the confined spaces. However, flying glass debris must be entirely governed by drag and lift forces that overcome gravity for a considerable time period. Also, the high speed in confined spaces theory is not entirely justified since the height of damage seen in the tower exceed too significantly the height of the Chase Center parking garage next to the tower. This theory was proposed because an increase in wind speed produce a drop in external pressure in the side and leeward walls and the pressure inside the building remained normal (high) thus resulting in a force that would overcome design pressures. Other interesting observations include those of ABS Consulting engineers who suggest that glazing damage may have been produced by "organized" vortices produced by the upwind Calpine Center and steady vortices between the Tower and the Chase Center parking garage.
The NatHaz Modeling Laboratory at the University of Notre Dame is currently conducting an investigation of the flow field around the structure, modeling the tower and the immediate area surrounding it using Computational fluid dynamics (CFD).
Preliminary findings suggest that the localized damage is the result of a confluence of multiple mechanisms arising from the arrangement of nearby buildings, critical flow directionality and the possible entrapment of debris within evolving flow structures.
Source: http://en.wikipedia.org/wiki/JPMorgan_Chase_Tower_%28Houston%29
See also:
- http://www.absconsulting.com/resources/Catastrophe_Reports/HurricaneIke_ChaseTower.pdf
- http://www.nd.edu/~nathaz/doc/NATHAZ_Ike_Glass_Dmg.pdf
A FEMA Report is enclosed!
Warning: Make sure you scan the downloaded attachment with updated antivirus tools before opening them. They may contain viruses. Use online scanners here and here to upload downloaded attachment to check for safety.
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