This work is an elementary but comprehensive textbook which provides the latest updates in the fields of Earthquake Engineering, Dynamics of Structures, Seismology and Seismic Design, introducing relevant new topics to the fields such as the Neodeterministic method. Its main purpose is to illustrate the application of energy methods and the analysis in the frequency domain with the corresponding visualization in the Gauss-Argant plan. However, emphasis is also given to the applications of numerical methods for the solution of the equation of motion and to the ground motion selection to be used in time history analysis of structures. As supplementary materials, this book provides "OPENSIGNAL", a rare and unique software for ground motion selection and processing that can be used by professionals to select the correct earthquake records that would run in the nonlinear analysis. The book contains clear illustrations and figures to describe the subjectin an intuitive way. It uses simple language and terminology and the math is limited only to cases where it is essential to understand the physical meaning of the system. Therefore, it is suitable also for those readers who approach these subjects for the first time and who only have a basic understanding of mathematics (linear algebra) and static analysis of structures.

Autorentext

Gian Paolo Cimellaro is currently Associate Professor at the Politecnico di Torino. He has been recently Visiting Professor at the University of California Berkeley (2014-2016). He obtained his M.S. (2005) and Ph.D. (2008) from the University at Buffalo (SUNY) in USA. Graduated cum laude in Civil Engineering, University of Rome La Sapienza (2001). He is the Chair of the ASCE Committee on "Disaster Resilience of Structures, Infrastructures and Communities" in USA. In 2011, he has received the Fib Achievement Award for Young Engineers, sponsored by fib - the international federation for structural concrete. In 2015, he has received the Seed Grant Award from the Siebel Energy Institute of UC Berkeley. Prof. Cimellaro current research interests address earthquake engineering with emphasis to community resilience to natural disasters such as earthquakes. He has been awarded a grant of 1.3 M EUR by the European Research Council for the research project "IDEAL RESCUE: Integrated Design and control of sustainable communities During emergencies" ERC-2014-StG (2015-2019). This is the most prestigious prize assigned in Europe to researchers, performing high-risk and high-gain ground-breaking research.

Sebastiano Marasco is currently Ph.D. student at the Politecnico di Torino (Italy). He received his master degree in Civil Engineering from the Politecnico di Torino in 2014. His thesis focused on the signal processing of earthquake records and he has implemented a software called Opensignal for earthquake record processing and selection adopted in both practice and academic field. His expertise is in the advanced software programming, in the seismic design of reinforced concrete buildings and in the F.E.M. analysis. His research under the supervision of Professor Gian Paolo Cimellaro is focused on the assessment of resilience in a urban environment. This research is part of project IDEal reSCUE founded by the European Research Council. As a part of this research, he has collected the building's data within a virtual city and developed an algorithm for estimating the capacity of each building under a seismic event.

Inhalt

Part I Dynamics of Structures1 Introduction 1.1 Idealization of the structures1.2 Degrees of freedom 1.3 Stiffness 1.4 Mass 1.5 Damping 1.6 Equations of motion 1.6.1 Free vibrations 1.6.2 External excitations 2 SDOF Systems 2.1 Linear SDOF Systems2.1.1 Free vibrations 2.2 Response to harmonic excitations 2.2.1 Undamped systems2.2.2 Viscously damped systems 2.3 Response to an impulsive excitation 2.4 Response to a periodic excitation 2.5 Earthquake response2.6 Transmissibility function 2.7 Nonlinear system response 3 Methods of solution of the equation of motion 3.1 Analytical methods3.2 Duhamel's integral 3.3 Fourier series3.4 Numerical methods3.4.1 Explicit methods 3.4.2 Implicit methods xiiixiv Contents3.4.3 Comparison between the different numerical methods3.4.4 Numerical methods for nonlinear problems 4 MDOF systems4.1 Discretization 4.2 Shear Type and Bending Type Frames4.3 Mass, Stiffness and Damping Matrix 4.3.1 Bending Type Frames4.3.2 Shear Type Frames4.4 Reduction of DOFs 4.5 Modal Analysis 4.5.1 Vibrational Modes Response4.5.2 Modal Expansion Of Displacements 4.5.3 Energetic Considerations4.6 Free Vibrations 4.6.1 Undamped Systems 4.6.2 Damped Systems 4.7 Response to Harmonic Excitation4.7.1 Undamped Systems4.7.2 Viscously Damped Systems 4.8 Earthquake response 4.8.1 Numerical example4.9 3D MDOF multistory buildings 5 Energy dissipation 5.1 Damping energy5.2 Plastic energy6 Damping on structures 7 Distributed mass and elasticity systems7.1 Vibrational Modes Analysis 7.2 Vibrational Modes Analysis of Forced Systems8 Generalized SDOF systems 8.1 Lagrangian approach8.2 Approximated solution8.2.1 Example 1: system with distributed mass and elasticity8.2.2 Example 2: system with distributed elasticity and lumpedmass 8.2.3 Example 3: general systems Part II Introduction to Earthquake EngineeringContents xv9 Seismology and Earthquakes 9.1 Basic concepts of seismology9.1.1 Earthquake Genesis 9.1.2 Seismological Parameters 9.1.3 Waves Propagation 9.1.4 Attenuation Relationship9.2 Ground motion parameters 9.2.1 Peak Parameters 9.2.2 Frequency and energetic content 9.2.3 Duration9.2.4 Other parameters 10 Major seismic events that occurred in Italy and in the world 10.1 Introduction10.2 Earthquakes occurred in Italy in the past 150 years10.3 Earthquakes occurred in the World from 1960 to the present day11 Seismic Hazard Analysis11.1 Deterministic Seismic Hazard Analysis (DSHA) 11.2 Probabilistic Seismic Hazard Analysis (PSHA)12 Earthquake prediction12.1 General aspects 12.2 Prediction methods12.2.1 Animal behavior 12.2.2 Changes in VP/VS12.2.3 Radon emission 12.2.4 Electromagnetic variations12.2.5 Precursory seismicity patterns 12.3 Earthquake prediction and time-dependent seismic hazard scenarios12.3.1 Algorithms for intermediate-term middle range earthquakeprediction12.3.2 Neo-deterministic time-dependent seismic hazardscenarios for the Italian territory 12.4 Notable predictions 12.4.1 Haicheng (China, 1975) 12.4.2 Parkfield (USA, 1985-1993) 12.4.3 Loma Prieta (USA, 1989)12.4.4 L'Aquila (Italy, 2009) 13 Seismic Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28513.1 Brief History of Italian Seismic Standards . . . . . . . . . . . . . . . . . . . . . . 28513.2 Elastic Response Spectra . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28713.3 Uniform Hazard Spectrum (UHS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28913.4 Design Response Spectrum (DS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29113.4.1 Design Response spectrum according to NTC08 and EC8 . . 292xvi Contents13.4.2 Conditional Mean Spectrum (CMS) . . . . . . . . . . . . . . . . . . . . . 30013.5 Use of Acceleration time histories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30213.5.1 Ground Motion Selection and Modification . . . . . . . . . . . . . . 30413.5.2 Available Databases for Signal Processing and GroundMotion Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30814 Opensignal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31114.1 State of Art . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31114.2 Structure of the software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31314.3 Strong Motion Databases . . . . . . . . . . . . . . . …