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Critical Excitation Methods In Earthquake Engineering

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Critical Excitation Methods in Earthquake Engineering

Critical Excitation Methods in Earthquake Engineering Book
Author : Izuru Takewaki
Publisher : Butterworth-Heinemann
Release : 2013-06-03
ISBN : 0080994296
Language : En, Es, Fr & De

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Book Description :

After the March 11, 2011, earthquake in Japan, there is overwhelming interest in worst-case analysis, including the critical excitation method. Nowadays, seismic design of structures performed by any seismic code is based on resisting previous natural earthquakes. Critical Excitation Methods in Earthquake Engineering, 2e, develops a new framework for modeling design earthquake loads for inelastic structures. The 2e, includes three new chapters covering the critical excitation problem for multi-component input ground motions, and that for elastic-plastic structures in a more direct way are incorporated and discussed in more depth. Finally, the problem of earthquake resilience of super high-rise buildings is discussed from broader viewpoints. Solves problems of earthquake resilience of super high-rise buildings Three new chapters on critical excitation problem for multi-component input ground motions Includes numerical examples of one and two-story models

Critical Excitation Methods in Earthquake Engineering

Critical Excitation Methods in Earthquake Engineering Book
Author : Izuru Takewaki
Publisher : Elsevier
Release : 2006-12-18
ISBN : 9780080467627
Language : En, Es, Fr & De

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Book Description :

Since the occurrence of earthquakes and their properties are very uncertain even with the present knowledge, it is too difficult to define reasonable design ground motions especially for important buildings. In the seismic resistant design of building structures, the concept of ‘performance-based design’ has become a new paradigm guaranteeing the maximum satisfaction of building owners. The quality and reliability of the performance-based design certainly depend on the scientific rationality of design ground motions. In order to overcome this problem, a new paradigm has to be posed. To the author’s knowledge, the concept of 'critical excitation' and the structural design based upon this concept can become one of such new paradigms. This book introduces a new probabilistic and energy-based critical excitation approach to overcome several problems in the scientific and rational modelling of ground motions. The author hopes that this book will help the development of new seismic-resistant design methods of buildings for such unpredicted or unpredictable ground motions. First comprehensive book for critical excitation methods Including updated, cutting-edge research Applicable to other worst-case analysis problems Including comprehensive review of critical excitation methods Including verification by comprehensive recorded ground motions

Design Optimization of Active and Passive Structural Control Systems

Design Optimization of Active and Passive Structural Control Systems Book
Author : Lagaros, Nikos D.
Publisher : IGI Global
Release : 2012-08-31
ISBN : 1466620307
Language : En, Es, Fr & De

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Book Description :

A typical engineering task during the development of any system is, among others, to improve its performance in terms of cost and response. Improvements can be achieved either by simply using design rules based on the experience or in an automated way by using optimization methods that lead to optimum designs. Design Optimization of Active and Passive Structural Control Systems includes Earthquake Engineering and Tuned Mass Damper research topics into a volume taking advantage of the connecting link between them, which is optimization. This is a publication addressing the design optimization of active and passive control systems. This title is perfect for engineers, professionals, professors, and students alike, providing cutting edge research and applications.

Critical Earthquake Response of Elastic Plastic Structures Under Near Fault or Long Duration Ground Motions Closed Form Approach via Impulse Input

Critical Earthquake Response of Elastic Plastic Structures Under Near Fault or Long Duration Ground Motions  Closed Form Approach via Impulse Input Book
Author : Izuru Takewaki
Publisher : Frontiers Media SA
Release : 2015-12-22
ISBN : 2889197425
Language : En, Es, Fr & De

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Book Description :

The specialty section Earthquake Engineering is one branch of Frontiers in Built Environment and welcomes critical and in-depth submissions on earthquake ground motions and their effects on buildings and infrastructures. Manuscripts should yield new insights and ultimately contribute to a safer and more reliable design of building structures and infrastructures. The scope includes the characterization of earthquake ground motions (e.g. near-fault, far-fault, short-period, long-period), their underlying properties, their intrinsic relationship with structural responses, and the true behaviors of building structures and infrastructures under risky and uncertain ground motions. More specific topics include recorded ground motions, generated ground motions, response spectra, stochastic modeling of ground motion, critical excitation, geotechnical aspects, soil mechanics, soil liquefaction, soil-structure interactions, pile foundations, earthquake input energy, structural control, passive control, active control, base-isolation, steel structures, reinforced concrete structures, wood structures, building retrofit, structural optimization, uncertainty analysis, robustness analysis, and redundancy analysis. This eBook includes four original research papers, in addition to the Specialty Grand Challenge article, on the critical earthquake response of elastic-plastic structures under near-fault or long-duration ground motions which were published in the specialty section Earthquake Engineering. In the early stage of dynamic nonlinear response analysis of structures around 1960s, a simple hysteretic structural model and a simple sinusoidal earthquake ground motion input were dealt with together with random inputs. The steady-state response was tackled by an equivalent linearization method developed by Caughey, Iwan and others. In fact, the resonance plays a key role in the earthquake-resistant design and it has a strong effect even in case of near-fault ground motions. In order to draw the steady-state response curve and investigate the resonant property, two kinds of repetition have to be introduced. One is a cycle, for one forced input frequency, of the initial guess of the steady-state response amplitude, the construction of the equivalent linear model, the analysis of the steady-state response amplitude using the equivalent linear model and the update of the equivalent linear model based on the computed steady-state response amplitude. The other is the sweeping over a range of forced input frequencies. This process is quite tedious. Four original research papers included in this eBook propose a new approach to overcome this difficulty. Kojima and Takewaki demonstrated that the elastic-plastic response as continuation of free-vibrations under impulse input can be derived in a closed form by a sophisticated energy approach without solving directly the equations of motion as differential equations. While, as pointed out above, the approach based on the equivalent linearization method requires the repetition of application of the linearized equations, the method by Kojima and Takewaki does not need any repetition. The double impulse, triple impulse and multiple impulses enable us to describe directly the critical timing of impulses (resonant frequency) which is not easy for the sinusoidal and other inputs without a repetitive procedure. It is important to note that, while most of the previous methods employ the equivalent linearization of the structural model with the input unchanged, the method treated in this eBook transforms the input into a series of impulses with the structural model unchanged. This characteristic guarantees high accuracy and reliability even in the large plastic deformation range. The approach presented in this eBook is an epoch-making accomplishment to open the door for simpler and deeper understanding of structural reliability of built environments in the elastic-plastic range

Modern Earthquake Engineering

Modern Earthquake Engineering Book
Author : Junbo Jia
Publisher : Springer
Release : 2016-10-01
ISBN : 3642318541
Language : En, Es, Fr & De

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Book Description :

This book addresses applications of earthquake engineering for both offshore and land-based structures. It is self-contained as a reference work and covers a wide range of topics, including topics related to engineering seismology, geotechnical earthquake engineering, structural engineering, as well as special contents dedicated to design philosophy, determination of ground motions, shock waves, tsunamis, earthquake damage, seismic response of offshore and arctic structures, spatial varied ground motions, simplified and advanced seismic analysis methods, sudden subsidence of offshore platforms, tank liquid impacts during earthquakes, seismic resistance of non-structural elements, and various types of mitigation measures, etc. The target readership includes professionals in offshore and civil engineering, officials and regulators, as well as researchers and students in this field.

Structural Seismic Design Optimization and Earthquake Engineering Formulations and Applications

Structural Seismic Design Optimization and Earthquake Engineering  Formulations and Applications Book
Author : Plevris, Vagelis
Publisher : IGI Global
Release : 2012-05-31
ISBN : 1466616415
Language : En, Es, Fr & De

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Book Description :

Throughout the past few years, there has been extensive research done on structural design in terms of optimization methods or problem formulation. But, much of this attention has been on the linear elastic structural behavior, under static loading condition. Such a focus has left researchers scratching their heads as it has led to vulnerable structural configurations. What researchers have left out of the equation is the element of seismic loading. It is essential for researchers to take this into account in order to develop earthquake resistant real-world structures. Structural Seismic Design Optimization and Earthquake Engineering: Formulations and Applications focuses on the research around earthquake engineering, in particular, the field of implementation of optimization algorithms in earthquake engineering problems. Topics discussed within this book include, but are not limited to, simulation issues for the accurate prediction of the seismic response of structures, design optimization procedures, soft computing applications, and other important advancements in seismic analysis and design where optimization algorithms can be implemented. Readers will discover that this book provides relevant theoretical frameworks in order to enhance their learning on earthquake engineering as it deals with the latest research findings and their practical implementations, as well as new formulations and solutions.

Building Control with Passive Dampers

Building Control with Passive Dampers Book
Author : Izuru Takewaki
Publisher : John Wiley & Sons
Release : 2011-09-23
ISBN : 0470824921
Language : En, Es, Fr & De

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Book Description :

The recent introduction of active and passive structural control methods has given structural designers powerful tools for performance-based design. However, structural engineers often lack the tools for the optimal selection and placement of such systems. In Building Control with Passive Dampers , Takewaki brings together most the reliable, state-of-the-art methods in practice around the world, arming readers with a real sense of how to address optimal selection and placement of passive control systems. The first book on optimal design, sizing, and location selection of passive dampers Combines theory and practical applications Describes step-by-step how to obtain optimal damper size and placement Covers the state-of-the-art in optimal design of passive control Integrates the most reliable techniques in the top literature and used in practice worldwide Written by a recognized expert in the area MATLAB code examples available from the book’s Companion Website This book is essential for post-graduate students, researchers, and design consultants involved in building control. Professional engineers and advanced undergraduates interested in seismic design, as well as mechanical engineers looking for vibration damping techniques, will also find this book a helpful reference. Code examples available at www.wiley.com/go/takewaki

Structural Design Optimization Considering Uncertainties

Structural Design Optimization Considering Uncertainties Book
Author : Yannis Tsompanakis,Nikos D. Lagaros,Manolis Papadrakakis
Publisher : CRC Press
Release : 2008-02-07
ISBN : 0203938526
Language : En, Es, Fr & De

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Book Description :

Uncertainties play a dominant role in the design and optimization of structures and infrastructures. In optimum design of structural systems due to variations of the material, manufacturing variations, variations of the external loads and modelling uncertainty, the parameters of a structure, a structural system and its environment are not given, fi

Improving the Earthquake Resilience of Buildings

Improving the Earthquake Resilience of Buildings Book
Author : Izuru Takewaki,Abbas Moustafa,Kohei Fujita
Publisher : Springer Science & Business Media
Release : 2012-07-26
ISBN : 144714144X
Language : En, Es, Fr & De

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Book Description :

Engineers are always interested in the worst-case scenario. One of the most important and challenging missions of structural engineers may be to narrow the range of unexpected incidents in building structural design. Redundancy, robustness and resilience play an important role in such circumstances. Improving the Earthquake Resilience of Buildings: The worst case approach discusses the importance of worst-scenario approach for improved earthquake resilience of buildings and nuclear reactor facilities. Improving the Earthquake Resilience of Buildings: The worst case approach consists of two parts. The first part deals with the characterization and modeling of worst or critical ground motions on inelastic structures and the related worst-case scenario in the structural design of ordinary simple building structures. The second part of the book focuses on investigating the worst-case scenario for passively controlled and base-isolated buildings. This allows for detailed consideration of a range of topics including: A consideration of damage of building structures in the critical excitation method for improved building-earthquake resilience, A consideration of uncertainties of structural parameters in structural control and base-isolation for improved building-earthquake resilience, and New insights in structural design of super high-rise buildings under long-period ground motions. Improving the Earthquake Resilience of Buildings: The worst case approach is a valuable resource for researchers and engineers interested in learning and applying the worst-case scenario approach in the seismic-resistant design for more resilient structures.

An Impulse and Earthquake Energy Balance Approach in Nonlinear Structural Dynamics

An Impulse and Earthquake Energy Balance Approach in Nonlinear Structural Dynamics Book
Author : Izuru Takewaki,Kotaro Kojima
Publisher : CRC Press
Release : 2021-03-16
ISBN : 1000365468
Language : En, Es, Fr & De

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Book Description :

Problems in nonlinear structural dynamics and critical excitation with elastic-plastic structures are typically addressed using time-history response analysis, which requires multiple repetitions and advanced computing. This alternative approach transforms ground motion into impulses and takes an energy balance approach. This book is accessible to undergraduates, being based on the energy balance law and the concepts of kinetic and strain energies, and it can be used by practitioners for building and structural design. This presentation starts with simple models that explain the essential features and extends in a step-by-step manner to more complicated models and phenomena.

Seismic Performance of Soil Foundation Structure Systems

Seismic Performance of Soil Foundation Structure Systems Book
Author : Nawawi Chouw,Rolando P. Orense,Tam Larkin
Publisher : CRC Press
Release : 2017-08-25
ISBN : 1351665685
Language : En, Es, Fr & De

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Book Description :

Seismic Performance of Soil-Foundation-Structure Systems presents invited papers presented at the international workshop (University of Auckland, New Zealand, 21-22 November 2016). This international workshop brought together outstanding work in earthquake engineering that embraces a holistic consideration of soilfoundation-structure systems. For example, the diversity of papers in this volume is represented by contributions from the fields of shallow foundation in liquefiable soil, spatially distributed lifelines, bridges, clustered structures (see photo on front cover), sea floor seismic motion, multi-axial ground excitation, deep foundations, soil-foundation-structurefluid interaction, liquefaction-induced settlement and uplift with SFSI. A fundamental knowledge gap is manifested by the isolated manner geotechnical and structural engineers work. A holistic consideration of soil-foundation-structures systems is only possible if civil engineers work collaboratively to the mutual benefit of all disciplines. Another gap occurs by the retarded application of up-to-date research findings in engineering design practices. Seismic Performance of Soil-Foundation-Structure Systems is the outcome from the recognized need to close this gap, since it has been observed that a considerable delay exists between published research findings and application of the principles revealed by the research. Seismic Performance of Soil-Foundation-Structure Systems will be helpful in developing more understanding of the complex nature of responses these systems present under strong earthquakes, and will assist engineers in closing the gaps identified above.

Resilient Structures and Infrastructure

Resilient Structures and Infrastructure Book
Author : Ehsan Noroozinejad Farsangi,Izuru Takewaki,Tony Y. Yang,Abolhassan Astaneh-Asl,Paolo Gardoni
Publisher : Springer
Release : 2019-05-03
ISBN : 9811374465
Language : En, Es, Fr & De

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Book Description :

This book discusses resilience in terms of structures’ and infrastructures’ responses to extreme loading conditions. These include static and dynamic loads such as those generated by blasts, terrorist attacks, seismic events, impact loadings, progressive collapse, floods and wind. In the last decade, the concept of resilience and resilient-based structures has increasingly gained in interest among engineers and scientists. Resilience describes a given structure’s ability to withstand sudden shocks. In other words, it can be measured by the magnitude of shock that a system can tolerate. This book offers a valuable resource for the development of new engineering practices, codes and regulations, public policy, and investigation reports on resilience, and provides broad and integrated coverage of the effects of dynamic loadings, and of the modeling techniques used to compute the structural response to these loadings.

Earthquake Engineering and Structural Dynamics in Memory of Ragnar Sigbj rnsson

Earthquake Engineering and Structural Dynamics in Memory of Ragnar Sigbj  rnsson Book
Author : Rajesh Rupakhety,Símon Ólafsson
Publisher : Springer
Release : 2017-12-07
ISBN : 3319620991
Language : En, Es, Fr & De

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Book Description :

This book presents methods and results that cover and extend beyond the state-of-the-art in structural dynamics and earthquake engineering. Most of the chapters are based on the keynote lectures at the International Conference in Earthquake Engineering and Structural Dynamics (ICESD), held in Reykjavik, Iceland, on June 12-14, 2017. The conference is being organised in memory of late Professor Ragnar Sigbjörnsson, who was an influential teacher and one of the leading researchers in the fields of structural mechanics, random fields, engineering seismology and earthquake engineering. Professor Sigbjörnsson had a close research collaboration with the Norwegian Institute of Science and Technology (NTNU), where his research was mainly focused in dynamics of marine and offshore structures. His research in Iceland was mainly focused on engineering seismology and earthquake engineering. The keynote-lecture based chapters are contributed by leading experts in these fields of research and showcase not only the historical perspective but also the most recent developments as well as a glimpse into the future. These chapters showcase a synergy of the fields of structural dynamics, engineering seismology, and earthquake engineering. In addition, some chapters in the book are based on works carried out under the leadership and initiative of Professor Sigbjörnsson and showcase his contribution to the understanding of seismic hazard and risk in Iceland. As such, the book is useful for both researchers and practicing engineers who are interested in recent research advances in structural dynamics and earthquake engineering, and in particular to those interested in seismic hazard and risk in Iceland.

Optimization and Anti optimization of Structures Under Uncertainty

Optimization and Anti optimization of Structures Under Uncertainty Book
Author : Isaac Elishakoff,Makoto Ohsaki
Publisher : World Scientific
Release : 2010
ISBN : 1848164785
Language : En, Es, Fr & De

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Book Description :

The volume presents a collaboration between internationally recognized experts on anti-optimization and structural optimization, and summarizes various novel ideas, methodologies and results studied over 20 years. The book vividly demonstrates how the concept of uncertainty should be incorporated in a rigorous manner during the process of designing real-world structures. The necessity of anti-optimization approach is first demonstrated, then the anti-optimization techniques are applied to static, dynamic and buckling problems, thus covering the broadest possible set of applications. Finally, anti-optimization is fully utilized by a combination of structural optimization to produce the optimal design considering the worst-case scenario. This is currently the only book that covers the combination of optimization and anti-optimization. It shows how various optimization techniques are used in the novel anti-optimization technique, and how the structural optimization can be exponentially enhanced by incorporating the concept of worst-case scenario, thereby increasing the safety of the structures designed in various fields of engineering.

Damping Technologies for Tall Buildings

Damping Technologies for Tall Buildings Book
Author : Alberto Lago,Dario Trabucco,Antony Wood
Publisher : Butterworth-Heinemann
Release : 2018-09-25
ISBN : 0128159642
Language : En, Es, Fr & De

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Book Description :

Damping Technologies for Tall Buildings provides practical advice on the selection, design, installation and testing of damping systems. Richly illustrated with images and schematics, this book presents expert commentary on different damping systems, giving readers a way to accurately compare between different device categories and gain and understand the advantages and disadvantages of each. In addition, the book covers their economical and sustainability implications. Case studies are included to provide a direct understanding on the possible applications of each device category. Provides an expert guide on the selection and deployment of the various types of damping technologies Drawn from extensive contributions from international experts and research projects that represent the current state-of-the-art and design in damping technologies Includes 25+ real case studies collected with very detailed information on damping design, installation, testing and other building implications

Seismic Performance of Asymmetric Building Structures

Seismic Performance of Asymmetric Building Structures Book
Author : Chunwei Zhang,Zeshan Alam,Li Sun,Bijan Samali
Publisher : CRC Press
Release : 2020-05-07
ISBN : 1000043096
Language : En, Es, Fr & De

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Book Description :

Seismic Performance of Asymmetric Building Structures presents detailed investigations on the effective assessment of structural seismic response under excessive torsional vibrations, demonstrating behavioural aspects from local response perspective to global seismic demands. The work provides comprehensive analytical, computational, experimental investigations, and proposes improved design guidelines that structural engineers can utilize to enhance the seismic design of asymmetric building structures. Combining extensive experimental and numerical data stock for seismic performance assessment with a particular focus on asymmetric building structures, the book includes: • An overview of asymmetric building structures from seismic damage perspective • Local and global performance assessment of asymmetric structures under extreme seismic actions • Post-earthquake damage evaluation from varying frequency trends • Extended numerical applications for experimental response validations • Evaluation of critical regions of asymmetric structure with stress concentration • Statistical distribution of seismic response under varying design parameters • Design guidelines for asymmetric building structures This work's comprehensive evaluations are carried out with modern sensing techniques planned with meticulous attention to cover objectives with a particular focus on asymmetry in reinforced concrete and steel structures. It assesses various aspects of asymmetric building structures that are rarely dealt with in the current literature. It gathers fruitful information from various building design codes and explains their limitations in addressing damage-related challenges, which is not only useful for practicing engineers but also for academics. The book will be invaluable for experts, researchers, students and practitioners from relevant areas, as well as for emergency preparedness managers.

Safety Reliability Risk and Life Cycle Performance of Structures and Infrastructures

Safety  Reliability  Risk and Life Cycle Performance of Structures and Infrastructures Book
Author : George Deodatis,Bruce R. Ellingwood,Dan M. Frangopol
Publisher : CRC Press
Release : 2014-02-10
ISBN : 1315884887
Language : En, Es, Fr & De

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Book Description :

Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures contains the plenary lectures and papers presented at the 11th International Conference on STRUCTURAL SAFETY AND RELIABILITY (ICOSSAR2013, New York, NY, USA, 16-20 June 2013), and covers major aspects of safety, reliability, risk and life-cycle performance of str

Innovative Methodologies for Resilient Buildings and Cities

Innovative Methodologies for Resilient Buildings and Cities Book
Author : Izuru Takewaki,Masayuki Kohiyama,Tomaso Trombetti,Solomon Tesfamariam,Xinzheng Lu
Publisher : Frontiers Media SA
Release : 2019-09-19
ISBN : 2889630722
Language : En, Es, Fr & De

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Book Description :

Resilient buildings and cities are in the center of common interests in modern academic communities for science and engineering related to built environment. Resilience of buildings and cities against multidisciplinary risks, e.g. earthquakes, strong winds, floods, etc., is strongly related to the sustainability of buildings and cities in which reduction of damage during a disaster and fast recovery from the damage are key issues. The reduction of damage is related to the level of resistance of buildings and the time of recovery is affected by the amount of supply of damaged members, assurance of restoration work, etc. Robustness, redundancy, resourcefulness, and rapidity are four key factors for supporting the full realization of design and construction of resilient buildings and cities. This research topic gathers cutting-edge and innovative research from various aspects, e.g. robustness of buildings and cities against earthquake risk, structural control and base-isolation for controlling damage risks, quantification of resilience measures, structural health monitoring, innovative structural engineering techniques for higher safety of buildings, resilience actions and tools at the urban scale, etc.

Recent Advances and Applications of Seismic Isolation and Energy Dissipation Devices

Recent Advances and Applications of Seismic Isolation and Energy Dissipation Devices Book
Author : Dario De Domenico,Enrico Tubaldi,Izuru Takewaki,Theodore Karavasilis,Andrea Dall’Asta,Oren Lavan
Publisher : Frontiers Media SA
Release : 2020-10-12
ISBN : 2889660729
Language : En, Es, Fr & De

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Book Description :

This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.