Seismic Design of Precast/Prestressed concrete Structures

IUSS Pavia
EE - Earthquake Engineering
Spring 2007
Date (from - to):
12/02/2007 – 09/03/2007
Major advances have been observed in the last decade in seismic engineering with further refinements of performance-based seismic design philosophies and definition of the corresponding compliance criteria. Following the worldwide recognized expectation and ideal aim to provide a modern society with high (seismic) performance structures able to sustain a design level earthquake with limited or negligible damage, emerging solutions have been developed for high-performance, still cost-effective, seismic resisting systems based on adequate combination of traditional materials and available technology. In this course, an overview of recent developments of innovative solutions for seismic-resisting precast/prestressed concrete buildings based on jointed ductile connections (also typically referred to as PRESSS-technology) will be given. Thanks to the use of unbonded post-tensioning techniques and additional sources of internal or external dissipaters, these self-centering and dissipative systems systems, are capable of undergoing major earthquake with minor damage when compared with traditional solutions. The students are expected to become familiar with the conceptual behaviour, design criteria and procedure as well as modeling aspects of these emerging systems. Updates on current trends in major international seismic code provisions will be provided along with real examples of existing on site applications as further confirmation of the easy constructability and speed of erection. Course Outline: Morning Lectures: Brief review of Force-Based (FBS) vs. Displacement Based Design (DBD) approaches. New trends and refinements of performance-based seismic design philosophies and definition of the corresponding compliance criteria. Role of residual deformations as additional damage indicator. Enhanced performance of self-centering systems. Alternative design philosophies and solutions for the seismic design of precast/prestressed concrete structures. Introduction to the PRESSS (Precast Seismic Structural Systems)-Technology. Jointed precast systems based on post-tensioning technique. The concept of hybrid system as combination of self-centering and dissipation and its mechanism (recently referred to as

Suggested readings:

fib, International Federation for Structural Concrete, 2003. Seismic design of precast concrete building structures, Bulletin 27, Lausanne, 254 pp. Priestley, M.J.N., 2003. Myths and Fallacies in Earthquake Engineering, revisited. Mallnet Millnet Lecture. New Zealand Concrete Society. 2005, PRESSS Technology. An Introduction to the Design of Ductile Jointed Precast Concrete Structures.