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Author: Muammer Avci
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Seismic base isolation of buildings is widely used and accepted to reduce structural and nonstructural damage caused by earthquakes. To explore performance and improvements to base isolation, experimental testing is necessary and real-time hybrid simulation (RTHS) can play a critical role in this process. RTHS allows a structural dynamic system to be partitioned into physical and numerical substructures. The substructure of interest is physically tested, while the substructure that is better understood or more difficult to test in the laboratory is simulated in real-time using analytical or numerical models. This research examines the role of newly proposed stability analysis methods in the application of real-time hybrid sub-structuring (RTHS) for challenging laboratory experiments, including the shake table testing of a fixed base superstructure in a base isolated system subjected to earthquake ground motion. Also, this research considers a seismically excited base isolated building with a supplemental viscous damper located at the isolation layer. Experimental results demonstrate the ability to safety conduct RTHS tests of a fixed base structure mounted to a shake table, in conjunction with a separate physical component of a device located in the isolation layer. This method can be applied to larger scale structures using the methods developed and demonstrated to design and conduct large-scale proposed RTHS experiments to further examine seismic base-isolation of building structures.
Author: Muammer Avci
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Seismic base isolation of buildings is widely used and accepted to reduce structural and nonstructural damage caused by earthquakes. To explore performance and improvements to base isolation, experimental testing is necessary and real-time hybrid simulation (RTHS) can play a critical role in this process. RTHS allows a structural dynamic system to be partitioned into physical and numerical substructures. The substructure of interest is physically tested, while the substructure that is better understood or more difficult to test in the laboratory is simulated in real-time using analytical or numerical models. This research examines the role of newly proposed stability analysis methods in the application of real-time hybrid sub-structuring (RTHS) for challenging laboratory experiments, including the shake table testing of a fixed base superstructure in a base isolated system subjected to earthquake ground motion. Also, this research considers a seismically excited base isolated building with a supplemental viscous damper located at the isolation layer. Experimental results demonstrate the ability to safety conduct RTHS tests of a fixed base structure mounted to a shake table, in conjunction with a separate physical component of a device located in the isolation layer. This method can be applied to larger scale structures using the methods developed and demonstrated to design and conduct large-scale proposed RTHS experiments to further examine seismic base-isolation of building structures.
Author: Masahiko Higashino
Publisher: Taylor & Francis
ISBN: 0415366232
Category : Buildings
Languages : en
Pages : 414
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Book Description
This state of the art report from an internationally-based task group (TG44) of CIB presents a highly authoritative guide to the application of innovative technologies on response control and seismic isolation of buildings to practice worldwide.
Author: International Atomic Energy Agency
Publisher:
ISBN: 9789201627193
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
Seismic isolation technology has the potential to significantly reduce the overall risk posed by earthquake ground motions to nuclear power plants. A testing programme is an integral part of a seismic isolation project. Not only must the isolating devices be characterized for design purposes, but also validation of the analytical procedures used in design is required. Hybrid simulation is a testing technique which is a good candidate to experimentally assess the behaviour of an isolation system. The method combines the computation of the response of the isolated structure with the experimental determination of the behaviour of full-scale isolators under the demand imposed by the movement of ground and structure. This publication contributes to the assessment of the method as a tool for the design and safety demonstration of base-isolated nuclear facility buildings.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 271
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Book Description
The increased need for experimental verification of the seismic performance of conventional and novel structural systems has resulted in highly sophisticated dynamic test procedures. Hybrid simulation, including pseudo-dynamic testing of experimental substructures, offers an efficient method for assessment of dynamic and rate-dependent behavior of large-scale structural systems subjected to earthquake excitation. Compared to earthquake simulations using shake tables, hybrid simulation may have significant advantages in terms of cost, scale, geometry, and required physical mass of structures and components that can be tested. However, recent hybrid simulations have been limited to simplified structural models with only a few degrees of freedom. This is primarily due to the fact that hybrid simulation is a relatively new test method that is still being improved through research. Currently, the major challenges for using hybrid simulation in large and complex structural systems are the lack of robust simulation algorithms, and the sensitivity of the results to experimental errors in the presence of high-frequency modes. The main motivation for this research is to develop reliable test procedures that can be easily applied to fast and real-time hybrid simulations of large and complex structural systems. It is also attempted to develop test procedures that are effective for geographically distributed hybrid simulations. In this dissertation, recent developments to improve the accuracy and stability of hybrid simulation are described using the state-of-the-art pseudo-dynamic hybrid simulation system at the Structural Engineering and Earthquake Simulation Laboratory, University at Buffalo. In particular, delay compensation procedures are examined, and new methods are proposed. These methods are based on the correction of tracking errors in force measurement signal, and using the numerical integration procedure for prediction and compensation of command displacement signal. A new online procedure is proposed for estimation of delay during the simulation, and is shown to have better performance compared to existing online delay estimation methods. Furthermore, two numerical integration procedures are introduced for hybrid simulation, which are shown to improve the stability and accuracy properties of the simulation. The proposed integration algorithms use experimental measurements to iterate within implicit scheme and also take advantage of a new approach to estimate the tangent stiffness matrix of experimental substructures. For assessment of the reliability of hybrid simulation results, energy-based error monitors are proposed to examine the severity of experimental and numerical errors. These measures are then used to demonstrate the improved accuracy offered by new algorithms proposed here through analytical and numerical studies, and numerical and experimental simulations.
Author: Wei Song
Publisher: Frontiers Media SA
ISBN: 2889663809
Category : Technology & Engineering
Languages : en
Pages : 213
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Book Description
Author: Gangbing Song
Publisher: MDPI
ISBN: 3038427853
Category : Technology & Engineering
Languages : en
Pages : 263
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Book Description
This book is a printed edition of the Special Issue "Energy Dissipation and Vibration Control: Modeling, Algorithm and Devices" that was published in Applied Sciences
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 348
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Book Description
Author: T.T. Soong
Publisher: Springer
ISBN: 3709130123
Category : Computers
Languages : en
Pages : 380
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Book Description
Base isolation, passive energy dissipation and active control represent three innovative technologies for protection of structures under environmental loads. Increasingly, they are being applied to the design of new structures or to the retrofit of existing structures against wind, earthquakes and other external loads. This book, with contributions from leading researchers from Japan, Europe, and the United States, presents a balanced view of current research and world-wide development in this exciting and fast expanding field. Basic principles as well as practical design and implementational issues associated with the application of base isolation systems and passive and active control devices to civil engineering structures are carefully addressed. Examples of structural applications are presented and extensively discussed.
Author: Michael N. Fardis
Publisher: Springer Science & Business Media
ISBN: 9400719779
Category : Technology & Engineering
Languages : en
Pages : 392
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Book Description
Nowadays research in earthquake engineering is mainly experimental and in large-scale; advanced computations are integrated with large-scale experiments, to complement them and extend their scope, even by coupling two different but simultaneous tests. Earthquake engineering cannot give answers by testing and qualifying few, small typical components or single large prototypes. Besides, the large diversity of Civil Engineering structures does not allow drawing conclusions from only a few tests; structures are large and their seismic response and performance cannot be meaningfully tested in an ordinary lab or in the field. So, seismic testing facilities should be much larger than in other scientific fields; their staff has to be resourceful, devising intelligent ways to carry out simultaneously different tests and advanced computations. To better serve such a mission European testing facilities and researchers in earthquake engineering have shared their resources and activities in the framework of the European project SERIES, combining their research and jointly developing advanced testing and instrumentation techniques that maximize testing capabilities and increase the value of the tests. This volume presents the first outcomes of the SERIES and its contribution towards Performance-based Earthquake Engineering, i.e., to the most important development in Earthquake Engineering of the past three decades. The concept and the methodologies for performance-based earthquake engineering have now matured. However, they are based mainly on analytical/numerical research; large-scale seismic testing has entered the stage recently. The SERIES Workshop in Ohrid (MK) in Sept. 2010 pooled together the largest European seismic testing facilities, Europe’s best experts in experimental earthquake engineering and select experts from the USA, to present recent research achievements and to address future developments. Audience: This volume will be of interest to researchers and advanced practitioners in structural earthquake engineering, geotechnical earthquake engineering, engineering seismology, and experimental dynamics, including seismic qualification.
Author: Victor Saouma
Publisher: CRC Press
ISBN: 1482288613
Category : Computers
Languages : en
Pages : 242
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Book Description
Hybrid Simulation deals with a rapidly evolving technology combining computer simulation (typically finite element) and physical laboratory testing of two complementary substructures. It is a cost effective alternative to shaking table test, and allows for the improved understanding of complex coupled systems. Traditionally, numerical simulation an
