Earthquake Engineering Analysis and Design

Earthquake Engineering Analysis and Design

Introduction

The seminar will start with an overview of the basic concepts and methods in structural dynamics, mainly intended as a revision exercise. The key characteristics of earthquake loads, and how they are idealised for analysis and design purposes, will then be presented. The remainder of the seminar will then focus on practical earthquake engineering, covering analysis methods and design concepts.

An introduction to the provisions of EC8 will be presented, including a brief review of its application in the UK . Advice will be given on further resources, including text-books and computer programs. Worked examples of analysis of practical structures will be provided, including an exercise on the analysis of a building to EC8 for completion after the course.

Participants are encouraged to read the two introductory chapters of the ICE Design and Practice Guide ‘Dynamics - an introduction for civil and structural engineers' before attending the course. (The publication can be purchased direct from Thomas Telford/ICE.)

Course Content:

• Introduction to structural dynamics
  • Introduction to dynamic system
  • The structural system
  • Dynamic loads
  • Single-degree-of-freedom (SDOF) systems
  • Equation of motion
  • Undamped free vibrations
  • Damping
  • Response to a sinusoidal applied force
  • Response to a general dynamic load
  • Response to a base motion
  • Multi-degree-of-freedom (MDOF) systems
  • Equations of motion
  • Natural frequencies and mode shapes
  • Response to a dynamic load mode
  • Superposition method
  • Summary, further reading and tutorial problem.

• Introduction to the earthquake resistant design of buildings
  • Fundamentals of seismic design of buildings.
  • Performance goals in buildings subject to earthquake loading.
  • Achieving satisfactory seismic performance.
  • Capacity design.
  • Ductility demand and supply.
  • Effects of soils on seismic response.
  • Site amplification effects.
  • Soil-structure interaction.
  • Liquefaction.
  • Introduction to Eurocode 8.
  • Overall structure.
  • Analysis methods.
  • Some basic principles in EC8 for building design:
    • Design for different levels of ductility
    • Primary and secondary elements
    • Capacity design
    • Design for different levels of seismicity.
  • Guidance material on Eurocode 8.
  • Equivalent lateral force analysis for buildings in EC8.
  • Design response spectrum.
  • Load combinations.
  • ‘Seismic' mass.
  • Exercise - seismic forces in a 12 storey building, designed to Eurocode 8.

Speakers:

Martin Williams

Martin Williams, FICE, MIStructE is Reader in Structural Engineering at Oxford University. He has extensive teaching, research and consultancy experience covering earthquake engineering, dynamic test methods and structural vibrations.

Edmund Booth

Edmund Booth, FICE, FIStructE runs his own consultancy specialising in earthquake resistant design, and is National Technical Coordinator for Eurocode 8.