## Vasileios Ntertimanis: Katalogdaten im Herbstsemester 2019 |

Name | Herr Dr. Vasileios Ntertimanis |

Adresse | Strukturmechanik und Monitoring ETH Zürich, HIT G 42.2 Wolfgang-Pauli-Str. 27 8093 Zürich SWITZERLAND |

Telefon | +41 44 633 79 45 |

v.derti@ibk.baug.ethz.ch | |

Departement | Bau, Umwelt und Geomatik |

Beziehung | Dozent |

Nummer | Titel | ECTS | Umfang | Dozierende | |
---|---|---|---|---|---|

101-0008-00L | Identification Methods for Structural Systems | 3 KP | 2G | E. Chatzi, V. Ntertimanis | |

Kurzbeschreibung | This course will present methods for assessing the condition of structures based on monitoring. The term "monitoring" corresponds to measurements of structural response (e.g. strains, deflections, accelerations), which are nowadays available from low-cost and easily deployed sensor technologies. We show how to exploit sensing technology for maintaining a safe and resilient infrastructure. | ||||

Lernziel | This course aims at providing a graduate level introduction into the identification and condition assessment of structural systems. Upon completion of the course, the students will be able to: 1. Test Structural Systems for assessing their condition, as this is expressed through stiffness 2. Analyse sensor signals for identifying characteristic structural properties, such as frequencies, mode shapes and damping, based on noisy or incomplete measurements of the structural response. 3. Establish relationships governing structural response (e.g. dynamics equations) 4. Identify possible damage into the structure by picking up statistical changes in the structural "signature" (behavior) | ||||

Inhalt | The course will include theory and algorithms for system identification, programming assignments, as well as laboratory and field testing, thereby offering a well-rounded overview of the ways in which we may extract response data from structures. The topics to be covered are : 1. Fundamentals of dynamic analysis (vibrations) 2. Fundamentals of signal processing 3. Modal Testing for determining the modal properties of Structural Systems 4. Parametric & Nonparametric Identification for processing test and measurement data i) in the frequency domain (Spectral Analysis, Frequency Domain decomposition) ii) in the time domain (Autoregressive models, the Kalman Filter) 5. Damage Detection via Stochastic Methods A comprehensive series of computer/lab exercises and in-class demonstrations will take place, providing a "hands-on" feel for the course topics. Grading: The final grade will be obtained, either - by 30% from the graded exercises and 70% from the written session examination, or - by the written session examination exclusively. The highest ranking of the above two options will be used, so that assignments are only used to strengthen the grade. | ||||

Skript | The course script is composed by the lecture slides, which are available online and will be continuously updated throughout the duration of the course: http://www.chatzi.ibk.ethz.ch/education/identification-methods-for-structural-systems.html | ||||

Literatur | Suggested Reading: T. Söderström and P. Stoica: System Identification, Prentice Hall International: http://user.it.uu.se/~ts/sysidbook.pdf | ||||

Voraussetzungen / Besonderes | Familiarity with MATLAB is advised. | ||||

101-0157-01L | Structural Dynamics and Vibration Problems | 3 KP | 2G | M. Vassiliou, V. Ntertimanis | |

Kurzbeschreibung | Fundamentals of structural dynamics are presented. Computing the response of elastic single and multiple DOF structural systems subjected to harmonic, periodic, pulse, and impulse is discussed. Practical solutions to vibration problems in flexible structures under diverse excitations are developed. | ||||

Lernziel | After successful completion of this course the students will be able to: 1. Explain the dynamic equilibrium of structures under dynamic loading. 2. Use second-order differential equations to theoretically and numerically model the dynamic equilibrium of structural systems. 3. Model structural systems using single-degree-of-freedom and multiple-degree-of-freedom models. 4. Compute the dynamic response of structural system to harmonic, periodic, pulse, and impulse excitation using time-history and response-spectrum methods. 5. Use dynamics of structures to identify the basis for structural design code provisions related to dynamic loading. | ||||

Inhalt | This is a course on structural dynamics, an extension of structural analysis for loads that induce significant inertial forces and vibratory response of structures. Dynamic responses of elastic and inelastic single-degree-of-freedom and multiple-degree-of-freedom structural systems subjected to harmonic, periodic, pulse, and impulse excitation are discussed. Theoretical background and engineering guidelines for practical solutions to vibration problems in flexible structures caused by humans, machinery, wind or explosions are presented. | ||||

Skript | The class will be taught mainly on the blackboard. Accompanying electronic material will be uploaded to ILIAS and available through myStudies. All the material can be found in Anil Chopra's comprehensive textbook given in the literature below. | ||||

Literatur | Dynamics of Structures: Theory and Applications to Earthquake Engineering, 4th edition, Anil Chopra, Prentice Hall, 2014 (Global Edition), ISBN-10: 9780273774242 Vibration Problems in Structures: Practical Guidelines, Hugo Bachmann et al., Birkhäuser, Basel, 1995 Weber B., Tragwerksdynamik. http://e-collection.ethbib.ethz.ch/cgi-bin/show.pl?type=lehr&nr=76 .ETH Zürich, 2002. | ||||

Voraussetzungen / Besonderes | Knowledge of the fundamentals in structural analysis, and in structural design of reinforced concrete, steel and/or wood structures is mandatory. Working knowledge of matrix algebra and ordinary differential equations is required. Familiarity with Matlab and with structural analysis computer software is desirable. |