The course aims to address the topic of seismic protection of structures through the techniques of isolation (structural-foundation and structure-structure decoupling) and additional damping (dissipation). Isolation and damping are advanced design techniques that use mechanical devices integrated into the structure to modify its dynamic response. The objectives of isolation and additional damping are to reduce the effects of seismic shaking, leading to a simplified and cost-effective design of the structure, and to concentrate damage in the isolation and/or damping devices, thereby reducing the time and cost of restoring the functionality of the technologically advanced structural system. These techniques have been extensively used in the design of new structures in high-hazard areas for several years and are gradually emerging as a competitive alternative to traditional solutions for retrofitting existing structures
Course Prerequisites
Basic knowledge of structural engineering, design of structures, and structural dynamics is required, with a specific focus on topics related to seismic behavior of structures
Teaching Methods
Lectures focusing on the fundamental theory of advanced design and the dynamic behavior of structural systems equipped with isolation and dissipation devices. Lectures on the operation and mechanics of devices used in practical applications. Laboratory sessions aimed at studying the dynamic behavior of devices through the execution of experimental tests. Lectures and exercises related to the design of isolation and dissipation systems
Assessment Methods
Preparation of a seismic isolation system design for a building's structure
Texts
• Dynamics of Structures, R.W. Clough, J. Penzien, McGraw-Hill, 1975 Principles of Passive Supplemental Damping and Seismic Isolation, C. Christopoulos, A. Filiatrault. IUSS Press, 2006 • Norme Tecniche per le costruzioni D.M. 17 Gennaio 2018 • EN15129:2009 “Antiseismic devices”
Contents
Decoupling and damping effects on the dynamic response of systems subjected to seismic actions Basis of advanced design and analysis of advantages compared to the traditional approach Dissipation mechanisms characterizing the behavior of devices used in practical applications: viscosity, hysteresis, and friction Rubber, lead-core rubber, and devices sliding on flat and curved surfaces Displacement- and velocity-dependent additional damping devices Dynamic restraint devices Study of device behavior through experimental tests Linear and nonlinear models for seismic devices (isolation and dissipation) Design of seismic isolation systems Design of additional damping systems Examples of application
Course Language
English
More information
Laboratory visits are planned to observe tests on seismic isolation and dissipation devices
