Design of Foundations for Dynamic Loads

Instructors

M. Hesham El Naggar, Ph.D., P.E., M.ASCE
Dr. El Naggar is a Professor of Civil and Environmental Engineering, and Associate Dean of Engineering at the University of Western Ontario Canada. He is the Chair of Soil Mechanics and Foundation Division of the Canadian Geotechnical Society and the associate editor of the Canadian Geotechnical Journal. He is a member of the American Society of Civil Engineers, and the International Society of Soil Mechanics and Foundation Engineering.

Professor El Naggar won the G.G. Meyerhof Award and was the 2002 Canadian Geotechnical Colloquium Speaker. He has more than 20 years of experience in analysis and design of foundations, and has taught undergraduate and graduate university courses at University of Western Ontario since 1990. He is also the recipient of the UWO Faculty of Engineering Science Prize for Outstanding Teaching. He accomplished research projects for the American National Cooperative Highway Research Program, The Canadian Research Foundation, Berming hammer Foundation Equipment, and A van Egmond Construction Ltd. He served as a consultant for major projects in Canada, USA, and Europe.

Ayman Shama, Ph.D., P.E., M.ASCE
Dr. Shama is a Senior Engineer with Parsons Corporation in New York. He is a member of the Earthquake Engineering Research Institute, Structural Institute, and ASCE Technical Committee on Performance of Full-Scale Structures. He has more than 15 years of diversified experience in the field of earthquake engineering and soil dynamics ranging from academic research to the practical procedures of analysis and design. Dr. Shama has been actively involved in the seismic design and analysis of several projects which emphasized the significance of soil-structure interaction such as the New Tacoma Narrows Bridge in Washington State, the Williamsburg Bridge in New York City, the North Grand Island Bridge in Upper New York, The Mount Hope Bridge in Rhode island, and the Trillium Building in Los Angeles. He has numerous papers published in peer-reviewed journals in the area of earthquake engineering with emphasis on bridge substructures. He also has given a number of presentations at distinguished conferences around the world.

Course Description

Soil dynamics is the branch of soil mechanics which deals with the behavior of soil and foundations under dynamic loads. Operation of rotary machines or hammers, and earthquake ground motions constitute a class of dynamic loads that usually challenge engineers in their design of different kinds of foundations. The main goal of this seminar is to provide a better understanding to practicing engineers and architects of the design and evaluation of foundations under this class of dynamic loads. Topics to be discussed include:

1. Basic Principles of Soil Dynamics: Fundamental distinctions between static and dynamic problems; basic notions of soil dynamics; the nature of different types of dynamic loads; the significance of soil-structure interaction; dynamic soil properties.
2. Dynamic Properties of Shallow and Pile Foundations: Impedance functions of foundations and pile groups; definition of stiffness, and damping, for circular shallow foundations and piles; non-circular shallow foundations; mathematical models for pile analysis.
3. Rotating Machine and Hammer Foundations: Harmonic excitations due to rotary machines; response of rigid foundations in 1DOF; evaluation of the effects of vibration; coupled response of rigid foundations in two degrees of freedom; types of hammers and hammer foundations; design criteria; mathematical models; impact forces and impact eccentricity.
4. Vibration Damage and Remedial Measures for Machine Foundations: Damage and disturbance; problem assessment and evaluation; remedial principles; examples from different industries; sources of error
5. Geotechnical Earthquake Engineering Fundamentals: Sources of seismic hazard; introduction to seismic waves; ground motion characterization and response spectra; evaluation of soil dynamic properties; site response analysis.
6. Design of Foundations for Seismic Loads: Dynamic bearing capacity of shallow foundations; dynamic response analysis of shallow foundations; conventional methods of analysis of piles under seismic loads; seismic analysis of deep caissons; seismic design of retaining walls; solved examples from industry.
7. Computer applications using DYNA-5: Types of foundations; types of soil models; types of loads; types of analysis and output; practical applications using DYNA-5
   

Seminar Benefits

• Understand the behavior of soils under dynamic loading
• Learn about soil-structure interaction and methods of incorporating it in global models
• Learn procedures for equipment foundation design
• Gain insight into the response of centrifugal, reciprocating, and hammer foundations
• Learn what are the basic dynamic soil properties and the required field tests for its evaluation
• Learn about basic Geotechnical earthquake engineering principles and its relation to global seismic analyses
• Find out latest procedures on modeling and design of different kinds of foundations for seismic loads
• Apply the knowledge of analysis and design procedure in hands-on exercises on computers in a workshop setting
  

Who Should Attend

This seminar should be of interest to structural engineers, Geotechnical engineers, and architects who wish to have a better understanding of the current state-of-the-art with respect to the analysis and design of flexible, rigid, and pile foundations subjected to all types of dynamic loads. All key concepts and terminology will be explained and emphasis will be placed on the practical application of the information provided.