DINAMICA DELLE STRUTTURE E PROGETTO DI COSTRUZIONI IN ZONA SISMICA

14 CFU - 1° and 2° Semester

Teaching Staff

AURELIO GHERSI

Learning Objectives

Design of buildings in seismic zone
This course aims at giving the theoretical knowledge of Dynamic of Structures. The fundamental aspects of structural analyses of buildings subjected to seismic actions will be treated during the course. In the first part of the course, the theoretical methods and numerical approaches to evaluate time-history responses of single and multiple degree of freedom systems will be addressed. In the second part, the modal analysis and design procedures based on elastic and non-elastic, response and design spectra, will be treated.
Design of buildings in seismic zone
This course aims at giving the theoretical knowledge and the practical capability for the structural design of buildings in seismic zone.

Course Structure

Design of buildings in seismic zone
The course will expect teaching activities in the classroom and training activities that will take place in the classroom, consisting in individual and group exercises and in the use of specific software.

Should teaching be carried out in mixed mode or remotely, it may be necessary to introduce changes with respect to previous statements, in line with the programme planned and outlined in the syllabus.
Design of buildings in seismic zone
Part of the lessons provides theoretical basis and applicative indication about design of buildings in seismic zone. Another part is dedicated to the development of a structural design of a building in seismic zone.

Should teaching be carried out in mixed mode or remotely, it may be necessary to introduce changes with respect to previous statements, in line with the programme planned and outlined in the syllabus.

Detailed Course Content

Design of buildings in seismic zone
Single degree of freedom systems (SDOF)

The simple pendulum model. The equations of equilibrium in the dynamic field. The viscous dumping model and the hysteretic dissipation. Forced and Free pendulum motion: harmonic forces with and without dumping. Dynamic amplification factor and resonance. Response to a seismic ground motions.

Response of an elastoplastic SDOF. Ductility demand and ductility capacity. Response spectra for assigned capacity.

Multi degree of freedom systems (MDOF)
Stiffness matrix. Mass matrix. Dumping matrix. Numerical methods for the integration of the equations of the motion. Determination of modes of vibration and natural frequency of vibration. Modal analysis.

Non-linear dynamic analysis. Design spectra.
Design of buildings in seismic zone
Organization of the structure. Estimate of seismic action and internal actions on structure. Sizing of structural elements. Model of structure. Basic and combined load conditions. Critical discussion of results of numerical analysis. Design of reinforcement, according to capacity design criterion.

Particular aspects, as the influence of non-structural elements on the global behaviour of the structure.

Design of r.c. buildings with shear walls in seismic zone

R.c. walls located only in the lower storey of the building and their influence on the seismic behaviour of the upper part of the building.

R.c. buildings in which the resistance to seismic action is provided by shear walls.

Textbook Information

Design of buildings in seismic zone
Anil K. Chopra. Dynamics of structures: Theory and applications to earthquake engineering. Upper Saddle River, N.J., Pearson/Prentice Hall, 2007.

Chapter 2 of Aurelio Ghersi, Pietro Lenza. Edifici antisismici in cemento armato. Dario Flaccovio Editore, Palermo, 2017.
Design of buildings in seismic zone
Aurelio Ghersi, Pietro Lenza. Edifici antisismici in cemento armato. Dario Flaccovio Editore, Palermo, 2017.

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