Seismic Protection of Structures with Modern Technologies

Institution:
University of Patras, Greece
Specialisation:
EE
Term:
Spring 2011
Teacher(s):
Nicos Makris
Credits:
8
Date (from - to):
21/02/2011 – 30/06/2011

INTRODUCTION

  • Conventional seismic design, performance criteria. The concept of seismic isolation and energy dissipation. Selected list of some recent seismic isolated projects

LINEAR VISCOELASTIC BEHAVIOR

  • Storage and loss stiffnesses, loss tangent. The concept of equivalent linear analysis. Modal damping ratios and effective damping coefficients. Frequency domain response.

HYSTERETIC BEHAVIOR

  • Frequency independent behavior. Transient motions; limitations of equivalent linear analysis.

SEISMIC ISOLATION

  • The linear theory of seismic isolation. Observed responses of base-isolated structures.

EARTHQUAKE REGULATIONS FOR SEISMIC ISOLATION

UBC – SEAONC. FEMA 273 & 274.

BEHAVIOR OF ELASTOMERIC BEARINGS UNDER COMPRESSION AND BENDING

  • Construction of elastomeric bearings. Rubber properties. Analysis under compression. Analysis under shear. Analysis under rotation. Stability.

BEHAVIOR OF SLIDING BEARINGS

  • Properties of sliding bearings. Single concave and double concave spherical sliding bearings. Flat sliders and restoring force devices.

PASSIVE ENERGY DISSIPATION SYSTEMS

  • Metallic dampers. Friction dampers. Viscoelastic dampers. Fluid dampers

VISCOUS HEATING

Suggested readings:

  • J.M. Kelly, Earthquake Resistant Design with Rubber, Springer-Verlag, London 1997.
  • R.I. Skinner, W.H. Robinson and G.H. McVerry, An Introduction to Seismic Isolation, John Wiley & Sons, Chichester 1993.
  • T.T. Soong and G.F. Dargush, Passive Energy Dissipation Systems in Structural Engineering, John Wiley and Sons, Chichester 1997.
  • Handouts, papers and reports (distributed or made available for photocopying).

Notes:

Prerequisites

  • Structural Mechanics
  • Structural Dynamics

Teaching and learning methods

Lectures, Computer programming homework

Assessment and grading methods

30 % homework, 70% term project