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Research Papers-world Conference of Earthquake Engineering

 
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B.V.Harsoda
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PostPosted: Mon Nov 26, 2012 9:25 pm    Post subject: Research Papers-world Conference of Earthquake Engineering Reply with quote

Research Papers-world Conference of Earthquake Engineering regarding Tall Buildings:-


EARTHQUAKE RECORDS OBSERVED IN TALL BUILDINGS WITH TUNED
PENDULUM MASS DAMPER
Tadashi NAGASE



Building Design Department, Takenaka Corporation, Osaka, Japan  email: nagase.tadashi@takenaka.co.jp


SUMMARY
A new damper to reduce the lateral vibration of buildings has been developed and installed in tall buildings in Japan, two office buildings and one hotel building.  The damper is of a pendulum-type
tuned mass damper (TMD), and the ice thermal storage tanks or the elevated water tank are used as the moving mass of the damper.   The TMD is the most successful damper against swaying of buildings in high wind, the TMD system in a high-rise building needs a huge mass and a large room for installation at the top floor of the building, causing extra production cost and storage space problems. A solution to these problems is the tuned pendulum mass damper using the huge tanks located at the rooftop of the building as the pendulum mass weight.  The damper of this type needs neither additional mass nor space because the building equipment is integrated into the damper. This paper presents three buildings with the pendulum mass damper using equipment tanks for ice thermal storage or water supply and discusses some intrinsic features of the damper and
demonstrates how simple and practical the damper is.  Typhoon records observed in the buildings with the pendulum damper prove that the TMD increases the damping ratio of the building to critical from 1% to 4% or more and lessens the building vibration by 50%.  Earthquake records and simulation analysis indicate that the damper cannot decrease the building responses during the main shock of the earthquake ground motion but can suppress the growth of the building’s motion quickly after the main shock.  It should be also emphasized in the earthquake response analysis of the hotel building that the TMD for torsional vibration reduction divides the original coupled modes of torsional translations into torsion and translation and can improve the response behaviors.
Link:-
http://www.iitk.ac.in/nicee/wcee/article/1893.pdf


Regards,
Er. B. V. Harsoda
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B.V.Harsoda
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PostPosted: Mon Nov 26, 2012 9:34 pm    Post subject: Reply with quote

Research Papers Links:-
Seismic Response of A Tall Building In Maxico City:-
http://www.iitk.ac.in/nicee/wcee/article/11_570.PDF

Seismic instrumentation of a tall building in Mexico City
http://www.iitk.ac.in/nicee/wcee/article/11_1422.PDF


Regards,
Er. B. V. Harsoda
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B.V.Harsoda
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Joined: 19 Jan 2009
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Location: RAJKOT,GUJARAT, INDIA

PostPosted: Mon Nov 26, 2012 10:03 pm    Post subject: Reply with quote

Papers:-
Structural design of base isolated tall building with high-damping laminated rubber bearing
http://www.iitk.ac.in/nicee/wcee/article/11_1330.PDF

Analytical study of active vibration control on tall buildings
http://www.iitk.ac.in/nicee/wcee/article/11_24.PDF

Development of hybrid mass damper using linear-induction-servomotor for vibration control of tall buildings
http://www.iitk.ac.in/nicee/wcee/article/11_426.PDF

Earthquake isolation of equipments installed on floors of tall building
http://www.iitk.ac.in/nicee/wcee/article/11_1447.PDF

INTERACTION OF TORSION AND P-DELTA EFFECTS IN TALL BUILDINGS
http://www.iitk.ac.in/nicee/wcee/article/13_799.pdf

Regards,
Er. B. V. Harsoda
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B.V.Harsoda
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PostPosted: Wed Nov 28, 2012 12:19 pm    Post subject: Reply with quote

Paper:-
Earthquake isolation of equipments installed on floors of tall buildings

http://www.iitk.ac.in/nicee/wcee/article/11_1447.PDF

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Er. B. V. Harsoda
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B.V.Harsoda
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PostPosted: Wed Nov 28, 2012 12:22 pm    Post subject: Reply with quote

13th World Conference on Earthquake Engineering
Vancouver, B.C., Canada
August 1-6, 2004
Paper No. 1985
USE OF AMBIENT VIBRATION TESTING FOR MODAL EVALUATION
OF A 16 FLOOR REINFORCED CONCRETE BUILDING IN LISBON,
PORTUGAL
Maria Ana BAPTISTA
1
, Paulo MENDES
2
, Alfredo CAMPOS COSTA
3
, Carlos SOUSA
OLIVEIRA
4
, Alexandra AFILHADO
5
, Pedro SILVA
6
SUMMARY
This paper presents a description of the experimental and analytical studies performed on a multi-storey office building in the newly residential and office area of Lisbon, Portugal. The building is located in sensitive alluvium soil, near Tagus river  –  Lisbon. This city was severely damaged by strong magnitude earthquakes e.g. 153126.01, 1755.11.01 and 1969.02.28. The selected building is a 16-storeyed reinforced concrete structure consisting of “oval” shaped flat plate
slabs with a central rectangular rigid core. The structure has 12 floors above ground and four basement levels. Ambient Vibration testing was conducted in order to determine natural frequencies, mode shapes and damping ratios. Those parameters were obtained using Artemis software. A FEM model of the structure was developed using SAP2000 software. Both the experimental results as well as the analytical results are presented in this paper and compared.
This work was financially supported by FCT, Portugal, project 36071 ECM 2000.
Sourcr Link:-
http://www.iitk.ac.in/nicee/wcee/article/13_1985.pdf

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Er. B. V. Harsoada
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