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 part of advanced design techniques and are based on the use of mechanical devices integrated into the structure to modify its dynamic response. Isolation and additional damping aim to, on one hand, reduce the effects of seismic shaking, leading to a simplified and cost effective design of the structure, and on the other hand, concentrate damages in the isolation and/or damping devices, also 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 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 non linear models for antiseismic devices (isolation and dissipation) • Design of seismic isolation systems • Design of additional damping systems • Application examples
Course Language
Italian
More information
Laboratory visits are planned to attend tests on isolation and dissipation antiseismic devices
