Parameter identification of torsionally coupled shear buildings from earthquake response records

Hegde, Ganesh; Sinha, Ravi

doi:10.1002/eqe.816

Cited by 21 publications

(18 citation statements)

References 22 publications

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“…To identify complete mode shapes one needs to have simultaneous vibration records at all floor levels or use mode shape interpolation techniques. It has been shown that vibration records collected at top and first floor level are sufficient to get the complete mode shapes of a symmetric torsionally-coupled shear building [18,19]. The mode shape interpolation techniques can be applied if the building is symmetric and follows uniform shear criterion [9].…”

Section: Modal Parameter Identification Techniquementioning

confidence: 99%

A Technique for Placing Few Sensors on a Building for Complete Modal Identification

Hegde¹,

Sinha²

2009

Mech. of Adv. Mat. & Structures

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Satisfactory calibration between a building and its numerical model can be achieved through system identification and model updating methods using responses recorded on the structures during seismic excitation or ambient vibration conditions. Due to economic considerations, the responses are commonly recorded at only few locations on the building. The identification of structural parameters of a general torsionally-coupled shear building with varying story stiffness and mass on each story requires response characteristics that may not be captured when only a few responses are recorded. This paper describes a method that uses interpolation techniques to increase the number of available responses for system identification for shear buildings subjected to base excitation. The responses at non-instrumented floor levels of building are reconstructed by interpolating using spline shape function. The recorded and reconstructed responses are used in a parameter identification algorithm to extract the modal properties of the building (natural frequencies, damping ratios and mode shapes). A rigorous analysis procedure that extends the spline shape function method to shear building for identifying effective locations of sensors is presented. The error in the reconstructed responses are defined by global minimax error and used in identifying locations of sensors on the building. The most suitable sensor locations for recording responses are found to be most linearly independent degrees-of-freedom in the structure as defined by the QR-decomposition of modal matrix of the building. The comparison of identified modal parameters and reconstructed responses shows good agreement with the corresponding exact value.

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Section: Modal Parameter Identification Techniquementioning

confidence: 99%

A Technique for Placing Few Sensors on a Building for Complete Modal Identification

Hegde¹,

Sinha²

2009

Mech. of Adv. Mat. & Structures

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“…The initial natural frequencies can be obtained by the vibration at the top oor [47]. [26] shows that the top and the ground levels are well enough to get the mode shapes of a symmetric torsionally-coupled shear building.…”

Section: Bidirectional Modeling Of Controlled Building Structuresmentioning

confidence: 99%

Advances in bidirectional modeling and structural control

Paul

2015

2015 Resilience Week (RWS)

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This paper provides an overview of building structure modeling and control under bidirectional seismic waves. It focuses on different types of bidirectional control devices, control strategies, and bidirectional sensors used in structural control systems. This paper also highlights the various issues like system identification techniques, the time-delay in the system, estimation of velocity and position from acceleration signals, and optimal placement of the sensors and control devices.978-1-4799-8594-4/15/$31.00 ©2015 IEEE

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“…An identification of dynamic models of a building structure using multiple earthquake records has been developed by Hong, Betti, and Lin (2009). Parameter identification of torsionally coupled shear buildings from earthquake response records has also been proposed by Hegde and Sinha (2008). Model updating of multistorey shear buildings for simultaneous identification of mass, stiffness and damping matrices using two different softcomputing methods has been developed by Khanmirza, Khaji, and Majd (2011).…”

Section: Introductionmentioning

confidence: 99%

Interval data-based system identification of multistorey shear buildings by artificial neural network modelling

Sahoo

Das

Chakraverty

2014

Architectural Science Review

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Present study intends to propose identification methodologies for multistorey shear buildings using powerful technique of artificial neural network models which can handle interval data. Identification with crisp data is known and neural network method has already been used by various researchers for this case. Here, the input and output data are handled in interval form. This is because, in general, we may not get the corresponding input and output values exactly (in crisp form), but we may have only the uncertain information of the data. These uncertain data are assumed in terms of interval and the corresponding problem of system identification is investigated. IntroductionSystem identification (SI) methods in structural dynamics, in general, solve inverse vibration problems to identify properties of a structure from measured data. Rapid progress in the field of computer science and computational mathematics has led to an increasing use of computers and efficient models to analyse, supervise and control technical processes. The use of computers and efficient mathematical tools allow identification of the process dynamics by evaluating the input and output signals of the system. The result of such process identification is usually a mathematical model by which the dynamic behaviour can be estimated or predicted. The idea may very well be used for other architectural discipline within SI problems. SI techniques play an important role in investigating and reducing gaps between the structural systems and their structural design models. This is also true in structural health monitoring for damage detection. A great amount of research has been conducted in SI. Modal-parameter SI and physicalparameter SI are two major branches in SI. The SI methods are generally used to extract dynamic characteristics of bridges, to know current behaviour of minarets against dynamic loads such as earthquake. SI techniques are also applied to determine vibration characteristics, modal shapes and damping ratios of complex structural system so as to frame knowledge for modelling and assessing current design procedures.Protection of cultural heritage against the effect of earthquake is an interdisciplinary research where the knowledge,

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Parameter identification of torsionally coupled shear buildings from earthquake response records

Cited by 21 publications

References 22 publications

A Technique for Placing Few Sensors on a Building for Complete Modal Identification

A Technique for Placing Few Sensors on a Building for Complete Modal Identification

Advances in bidirectional modeling and structural control

Interval data-based system identification of multistorey shear buildings by artificial neural network modelling

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