Analysis, Design & Performance

Single Abstract

343060 - Vibration Characteristics of Tall Tower in Kuwait using Finite Element Analysis and Measurements using Accelerometers and GPS

Friday, April 20
3:30 PM - 5:00 PM
Location: 204AB

Tall buildings are rapidly increasing in Kuwait for the past 10 years. Regional and local earthquakes would have significant effects on tall buildings, and thus monitoring structural responses of buildings is important. Tall building deformation behavior could be monitored using Structural Health Monitoring (SHM) technology. Traditionally, in the SHM, vibration characteristics are measured using accelerometers. Dynamics characteristics such as frequency, mode shapes and damping of the structure could then be obtained from the measured acceleration. Continuous monitoring of these parameters can be used identify the onset of any damage. Physical deformation of the structure also could be estimated using the measured acceleration to estimate the inter storey drift. Recently, Global Position System (GPS) has been successfully used to monitor tall building movement. In the preset paper, the dynamic characteristics of a unique shaped tall building in Kuwait has been presented using finite element analysis, acceleration and GPS measurements. Detailed three dimensional finite element model of the tall building has been developed using classical frame and plate bending elements. The finite element model did not consider soil structure interaction. The buildings has a unique twisted shape and it is incorporated in the finite element model quite accurately. The finite element model shows the first two modes are bending modes. These two modes have coupled deformation in N-S and E-W directions. The third mode of the tower is torsional mode. Due to the twisted geometry of the tower, torsional mode is quite dominant. Hence, a horizontal load (or deformation) can result in a vertical components of the same (load or displacement).
Accelerations were measured using accelerometers at three different floors of the building (non-synchronized) using tri-axial accelerometer. The measured acceleration is being used to obtain the natural frequency of the tower. The finite element predicted natural frequency for the first three modes of the building is matching quite accurately with measured natural frequency obtained from the accelerometer sensor measurements.
The building vibration characteristics are measured using a GPS placed on the top floor of tower. GPS measurements predicted the natural frequency of the first two modes quite accurately when compared to the predicted frequency using accelerometer and finite element model.

Jafarali Parol

ASSOCIATE RESEARCH SCIENTIST
KUWAIT INSTITUTE FOR SCIENTIFIC RESEARCH

Obtained Masters degree in structural engineering in 2002, Phd in Structural engineering in 2007 from National Institute of Technology, Calicut India.
Worked as Research Fellow at the CSIR Centre for Mathematical Modelling and Computer Simulation, Banagalore, India, Feb 2002 - Jan 2005
Worked as Scientist at the Aeronuatical Development Agency, Ministry of Defence, India, Jan 2005 - Jan 2008
Worked as Techncal Leader, General Electric Company, JFWTC, Bangalore, India, Jan 2008 - Dec 2012
Associate Research Scientist, Kuwait Institute for Scientific Research, Kuwait, Jan 2013-till date
Area of expertise: Error analysis in Finite element modelling, Nonlinear finite element analysis of reinforced concrete structures, Structural vibration, Structural health monitoring

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Hasan Kamal

Municipal Councellor,
Kuwait Municipal Councel

n/a

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Jamal Al-qazweeni

PROGRAM MANAGER
KISR

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343060 - Vibration Characteristics of Tall Tower in Kuwait using Finite Element Analysis and Measurements using Accelerometers and GPS



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