Unit EARTHQUAKE ENGINEERING
- Course
- Civil engineering
- Study-unit Code
- GP004415
- Curriculum
- Strutture
- Teacher
- Marco Mezzi
- Teachers
-
- Marco Mezzi
- Hours
- 84 ore - Marco Mezzi
- CFU
- 12
- Course Regulation
- Coorte 2020
- Offered
- 2021/22
- Learning activities
- Caratterizzante
- Area
- Ingegneria civile
- Academic discipline
- ICAR/09
- Type of study-unit
- Obbligatorio (Required)
- Type of learning activities
- Attività formativa monodisciplinare
- Language of instruction
- Italian
- Contents
- Notes of seismology. Dynamics of systems. Seismic analysis: static and dynamic, linear and nonlinear. Earthquake-resistant systems. Building system. Code prescription. Zoning. Principles of earthquake-resistant design. R/C and steel elements. Base isolation and energy dissipation. Bridges. Introduction to modal identification of existing structures for seismic load estimation. Design laboratory.
- Reference texts
- Material and specific bibliography from the teacher.
Castellani A., Faccioli E. "Costruzioni in zona sismica". Hoepli.
Parducci A. "Fondamenti di ingegneria sismica in 80 lezioni". Liguori.
In depth books:
Chopra A. "Dynamic of structures: theory and application to earthquake engineering ". Prentice Hall. 1995.
Bozorgnia Y., Bertero V.V. "Earthquake Engineering". CRC Press.
Brincker R., Ventura C. "Introduction to Operational Modal Analysis". Wiley, 2015. - Educational objectives
- The module shows the dynamic and static, linear and non linear, methods of seismic analysis; the seismic-resistant structural schemes; the code provisions for constructions in seismic areas; the construction details of r/c and steel seismic-resistant elements; the seismic isolation and energy dissipation. A didactic space is dedicated to develope a guided and assisted design application. The expected learning outcomes are listed in the following.
The main acquired knowledge will be:
• knowledge of the methods for the analysis of structures subjected to earthquakes;
• knowledge of the behavior of basic structural schemes for the resistance to lateral actions;
• knowledge of prescriptions of Italian and European codes concerning general aspects and detailing in the design of r/c and steel seismo-resistant costruction;
• knowledge of the basic principles of the seismic protection of structures (resistance, redundancy, resilience, ductility, capacity design);
• knowledge of advanced seismic-resistant systems based on the use of base isolation and energy dissipation.
The main acquired skills, intended as ability to apply knowledge and to adopt with independence of judgment the most appropriate approach, will be:
• ability to select and apply the appropriate approach for the assessment of the consequences of the seismic action on a construction, with awareness of the significance and the values of the involved parameters and the quantities ;
• ability to select and apply a behavior model of a structural scheme aimed at interpreting the sismic-resistant capacity of the structure with reference to the performance expectations in the event of an earthquake;
• ability to select and apply the provisions of the relevant codes in the design of a construction in earthquake prone area and to translate them into construction configurations of detail;
• ability to choose and design a suitable sismic-resistant structural system for the seismic safety of a construction. - Prerequisites
- For the comprehension of the contents of the course and for the achievement of the provided educational objectives the following knowledge are required:
•Mathematical Analysis: derivation and integration techniques of functions of several variables; differential equations.
•Physics and Analytical Mechanics: vector calculus; equations of the static and dynamic equilibrium.
•Strenght of Materials and Structural Design: elements of strength of materials; static analysis of prismatic solid; static analysis of isostatic and hyperstatic structures (forces method and displacements method); mechanical aspects of the continuous; procedures for the safety verification through the semi-probabilitistic method of ultimate limit states; modeling, analysis, solution of structural systems (beams, frames); methods of verification of r/c and steel elements; code prescriptions for the design and the verification of r/c and steel elements. - Teaching methods
- Theoretical lessons and practical training
- Learning verification modality
- The verification of the educational objectives of the course (exam) provides an oral exam. Within the oral exam the presentation of drawings and report developed in the design laboratory (practical training).
The oral exam consists of a discussion lasting no more than about 40 minutes to determine: (a) the correctness, completeness and accuracy of the project developed in the design laboratory (practical training); (b) the level of knowledge of the theoretical and methodological contents of the course; (c) the level of competence in exposing the possible technical solutions of problems concerning modeling and solution of seismic-resistant structural schemes, dimensioning and checking of structural components stressed by the effect of seismic actions in the elastic and post-elastic range; (d) the independence of judgment in proposing the most appropriate approach for each application, with the full awareness of the simplifying assumptions adopted in the different modeling of structure and seismic action, the physical meaning of the involved parameters, the level of uncertainty of the obtained result; (e) the student's ability to expose with property of language the topics proposed by the commission, to support a dialectical relationship during the discussion, and to summarize the results of application of studied theories. The final evaluation will be carried out by the Commission in thirtieths on the basis of the oral exam result. - Extended program
- Element of seismology:
Causes and mechanisms of the earthquakes. Seismic waves. Intensity of the earthquake: macro-scales, magnitude, energy, intensity. Hazard, vulnerability, risk.
Dynamics of systems:
Notes of structural dynamics: seismic dynamics of SDOF systems. Response spectra. Code elastic response spectra. Dynamics of MDOF systems; modal analysis. Equivalent static analysis. Codes for seismic analysis.
Nonlinear seismic behaviour:
Equation of motion of EP SDOF system. Ductility, ductility demand and capacity. Anelastic response spectra. Behaviour coefficient. Nonlinear dynamic analysis. Nonlinear static analysis. Capacity spectra.
Seismic code:
Italian seismic code. References to Eurocode. Seismic zoning. Historical seismology. Micro-zoning. Performance Based Seismic Design. Analysis of building system: redistribution of lateral forces, centre of mass and stiffness, torsion actions.
Principles of seismic design of a building:
Configurations and earthquake-resistant systems. Load analysis, static analysis, modal analysis. Structural morphology and behaviour factor for types of earthquake-resistant systems. Non-structural elements.
Seismic design of structures:
R/C buildings: typical damage; ductility mechanisms; capacity design; structural detailing. Steel buildings: earthquake-resistant configurations; behaviour factor; ductility; detailing. Bridges: principles of seismic design.
Seismic isolation and energy dissipation:
General principles of response reduction. Isolating and dissipating devices. Code prescriptions and design methods.
Introduction to modal identification of existing structures for seismic load estimation. Introduction to inverse problems of modal identification of structures. Differences between EMA and OMA, elements of stochastic processes, spectral density matrix, spectral decomposition and singular value decomposition. Errors in modes estimations: colored excitation, spurious modes due to noise and overmodeling. Elements of signal processing. Frequency domain decomposition identification technique. Elements of modal damping identification and identification in the time domain. Introduction to long-term structural health monitoring for earthquake-induced damage detection. Practical examples of output only modal identification of real civil engineering structures.
Design laboratory: Development of the seismic design of a r/c building. Design of the structural elements. Capacity design. Design of a base isolated variant.