CE 234 Nonlinear analysis in earthquake engineering 3:0

Instructor: C S Manohar

Term: October 2020 to February 2021

Time: TTH2-3:30.

Earthquake load specification via time histories and response spectra. Seismic hazard. Spectrum compatible accelerograms. Numerical integration of equations of motion. Modelling of material nonlinear behaviour: oscillator models, frame models, and continuum plasticity approach. Characterization of hysteresis, strength and stiffness degradation, pinching, and residual effects. Energy dissipation characteristics. Models for seismic demands and capacities. Inelastic response spectra and capacity spectrum. Static push over analysis and incremental dynamic analysis. Seismic fragility. Prescriptive codes. Overview of performance-based engineering.

C S Manohar

Chopra A K, 1996, Dynamics of structures, Prentice Hall, New Dehli

R Villaverde, 2009, Fundamental concepts of earthquake engineering, CRC Press Boca Raton

A S Elnashai and L D Sano, 2008, Fundamentals of earthquake engineering, Wiley, Chichester.

Current literature

Background

Earthquake resistant design of structures involves design for controlled inelastic behaviour. This, in turn, calls for an understanding of nonlinear transient dynamic analysis of structures under earthquake support motions. The course aims to provide a contemporary overview of the relevant modelling and computational issues.

Course Objectives

1. To introduce basics of seismic wave propagation, soil-structure interactions, seismic hazard, and performance based structural engineering formats.

2. To develop an understanding of modelling inelastic behaviour in earthquake engineering problems.

3. To understand the nature of earthquake induced loads on engineering structures and discuss engineering approaches to specify these loads.

4. To introduce finite element modelling of geometric and/or material nonlinear behaviour in characterizing seismic response of engineering structures by time domain integration.