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Costruzioni in Zona Sismica
Structures in seimic area
Laura Ragni

Seat Ingegneria
A.A. 2015/2016
Credits 9
Hours 90
Period 2s
Language ENG

Prerequisites
Material covered in structural analysis is considered as assumed knowledge.

Learning outcomes
The aim of course is to provide the fundamental concepts of Earthquake Engineering to conceive a building construction with a level of seismic risk default, both in relation to the ultimate capacity, both as regards its functionality; this for new construction buildings, with particular reference to concrete buildings, and existing buildings.

Program
Elements of seismology Earthquake causes and mechanisms. Seismic wave propagation: body waves and surface waves. Laws governing the seismic motion, magnitude, energy and intensity. Elements of seismic risk and vulnerability. Basics on Dynamics of linear Single Degree Of Freedom (SDOF) Multi Degree Of Freedom (MDOF) systems. SDOF system: free vibration, response to forced vibrations, seismic action. Displacement, pseudo-velocity and pseudo-acceleration response spectra. Static equivalent analysis. MDOF system: Equation: free vibrations (modal analysis), response to forced vibrations, seismic action. Static equivalent analysis and dynamic modal analysis. Stiffness matrix for a bi-dimentional frame. Behaviour of bi-dimentional frames under horizontal loads. Stiffness matrix for a tri-dimentional frame. Behaviour of tri-dimentional frames under horizontal loads. Basics of structural analysis: dispacement method for solving bi-dimentional frames and foundations. Seismic code Seismic action: performance based design, elastic response spectra, macrozonation and microzonation of Italy. Design general rules: elasto-plastic oscillator and constant ductility spectra, oscillator with hardening non-linear behaviour and design spectra. Behaviour factor and ductility of structural systems. Analysis methods and safety verifications. Basic principles of conceptual design of building in seismic areas Vertical resisting systems and behaviour factors, elevation regularity, floor stiffness/resistance, plan regularity, seismic gaps and non-structural elements. Foundations Seismic analysis of buildings Reinforced concrete buildings: behaviour factor. Structural ductility: material ductility, local and global ductility. Capacity design. Ultimate Limit State safety verifications, Damageability Limit State verifications. Other structural systems: steel buildings, building with innovative control systems (base isolations and dissipative braces)

Development of the examination
LEARNING EVALUATION METHODS
The learning level reached by a student is evaluated on the basis of: - a written examination concerning a r.c.moment resising frame; - an oral examination in which the written examination is discussed and the theoretical understanding of some topics covered during the course is checked; students may be requested to answer some questions in writing; successively the answers will be discussed orally. To access to the oral examination the student is required to have obtained an almost suffient evalution of the written examination. The oral examination have to be sustained whitin one year from the written one.

LEARNING EVALUATION CRITERIA
Through the written and the oral examinations the student must demonstrate to have understood the topics of the course and to know analysis and design methods of seismic resistant structures.

LEARNING MEASUREMENT CRITERIA
The evaluation of both the written and the oral examinations is expressed in thirtieths.

FINAL MARK ALLOCATION CRITERIA
After the discussion during the oral examination a final mark is given to the written examination and the answers given by the student about questions on topics of the course are also evaluated. The student is expected to pass both assessments and the final mark of the course will be calculated as the average of the marks received for these two assessments. The 'lode' will be awarded to students who, having correctly completed the two assessments, show an outstanding understanding in the subject.

Recommended reading
Faccioli E. Paolucci R. Elementi di sismologia applicati all’ingegneria . Pitagora Editrice, 2005. Castellani A., Faccioli E. Costruzioni in zona sismica. Hoepli, 2008. Petrini L., Pinho R., Calvi G.M. Criteri di progettazione antisismica degli edifici.

Courses

• Ingegneria Edile-Architettura (Corso di Laurea Magistrale con Riconoscimento Europeo (DM 270/04))