LEARNING OUTCOMES

The module addresses the issues related to the structural design in seismic areas. It discusses the techniques of analysis and design of seismic resistant organisms, by addressing the structural design, modeling of actions, seismic analysis and structural calculation.

AIMS AND LEARNING OUTCOMES

The aim of the course is to provide students with the essential tools of seismic design. Given the complexity of the phenomenon dealt with, it will supply the elements to evaluate the essential aspects of the analysis, including the choice of the seismic-resistant system, the criteria for modeling the seismic action and the structure, the methodology for calculation and seismic verification. With particular regard to the simplicity and the interpretation of the applied  models, tools will be provided to evaluate the most suitable procedures, critically analyze the results obtained, and identify the most appropriate structural choices.

At the end of the course the students will be able to assess the seismic of the investigated structure, to evaluate the most effective structural solutions, to choose the criteria of seismic analysis, to define representation models of the action and of the structure, to carry out the calculation and seismic verification, to define structural choices.They will be able to address the issue of vulnerability mitigation of existing buildings in order  to reduce the seismic risk within acceptable values.

TEACHING METHODS

The course is conducted through lectures given by the teacher and numerical exercises at the computer center. The teacher also provides in advance the track of the lesson through AulaWeb.

SYLLABUS/CONTENT

• basic of seismology, origin of earthquakes, measure of the earthquake, seismic risk.
• seismic analysis of linear sdof systems. Response spectrum, equivalent static action
• seismic analysis of non-linear sdof systems. Non linear oscillator, ductility, anelastic response spectrum, behaviour factor.
• Seismic action and design. Seismic codes and standards, performance based design, seismic zones.
• Seismic analysis of NDOF systems. Equivalent static analysis,Dynamic seismic analysis; vibration modes, effective seismic mass. 
• Non linear static analysis. Seismic demand, ADRS spectrum, push over curve, capacity spectrum, N2 technique.
• Seismic design of structures. Concept of the aseismic design, seismic rtesistant structure, structural morphology, mass and stiffness center, distribution of the seismic forces on the bracing system, ductility and capacity design, behaviour factor.
• Seismic design of buildings. Simplified static model, force distribution on the floors.
• Ductility of RC and steel structural systems. Ductility of the material, members and bracing systems, , structural details, overview of structural collapses.
• Seismic behaviour of the ground. Effect of the seismic action over the bearing capacity of the ground, seismic load on the retaining walls, local amplification
• Seismic design of a rc building. Load and weights, static equivalent analysis, dynamic analysis. Seismic design of the structural members

RECOMMENDED READING/BIBLIOGRAPHY

handouts of Constructions (prof. Solari), Structural Dynamics (prof. Piccardo), Seismic Engineering (prof. Pagnini)

Eurocode 8 “Design provisions for earthquake resistance of structures, Part 1: General rules”, ENV 1993-2-1, European Committee for Standardization, 1994;Fajfar, P. (1999), ‘Capacity Spectrum method based on inelastic demand spectra’, earthquake engineering and structural dynamic, 28, 979-993;

Park, T., Priestley M.J.N. “Seismic design of reinforced concrete and masonry buildings”. Wiley, NY, 1992;

Aicap “Progettazione di strutture in calcestruzzo armato, guida all’uso del’Eurocodice 2

con riferimento alle Norme Tecniche D.M. 14.1.2008”, Vol. 1, Edizione Pubblicemento, Roma, 2008

Aicap, “Progettazione sismica di edifici in calcestruzzo armato, guida all’uso dell’Eurocodice 2 con riferimento alle Norme Tecniche D.M. 14.1.2008”, Vol.2, Edizione Pubblicemento, Roma, 2008