Soil Dynamics Short Course
Instructors
Ahmed Elgamal
Department of Structural Engineering
University of California - San Diego
Shamsher Prakash
Professor Emeritus
Missouri University of Science and Technology
Schedule
Monday, August 11, 2008
8:00 AM - 10:00 AM - Soil Dynamics and Modeling (Prakash)
Problems of dynamic loading of soils, seismic loading, other sources of dynamic load, ground motion associated with earthquakes, effects of earthquakes on structures, damage during earthquakes, engineering vibrations, sensitivity of humans to vibrations. Single and Multiple Degrees of System. Natural Frequencies, Springs and Dashpost, Material and Radiation Damping, and idealization of structure for analysis. Free and forced vibrations. Source and magnitude of damping in structures.
10:00 AM – 12:00 PM - DYNAMIC SOIL PROPERTIES AND CUMPUTATION MODELING (Elgamal)
Measures of dynamic soil properties at low and high strain. Cyclic strength. Use of wave propagation techniques. Non-linear soil behavior. Ground response to earthquakes. Data Bank, problems; selection of design parameters computational modeling including site amplification and 2D finite element modeling,. Shake 91: typical results.
12:00 PM – 1:00 PM Lunch Break
1:00 PM – 3:00 PM - LIQUEFACTION AND CASE HISTORIES (Elgamal)
Liquefaction of soils. Settlement and spreading. Methods of analysis. Cyclic: A nonlinear finite-element code http://cyclic.ucsd.edu. Remedial measure against liquefaction, lateral loads on piles, . OpenSeesPL a 3D ground modification FE user-friendly interface (http://cyclic.ucsd.edu/openseespl ), Case Histories.
3:00 PM – 5:00 PM - RETAINING WALL UNDER SEISMIC LOADING (Prakash)
Static and dynamic earth pressure. Design of retaining walls. Displacement analysis of rigid retaining walls and abutments. Design procedure. Design problems. Design charts, and retrofit of existing structures.
5:00 PM 6:00 PM Discussion
Tuesday, August 12, 2008
8:00 AM – 10:00 AM - RESPONSE SPECTRA AND APPLICATION (Elgamal)
Response spectra for force-excited systems. Design approaches for dynamic loads. Experimental determination of dynamic system properties. Euro-code and uniform building code recommendations.
10:00 AM – 12:00 PM - PILE FOUNDATION UNDER SEISMIC LOADING (Prakash)
Piled foundations under static, dynamic and seismic loadings: Overview of models and methods of analysis. Simplified models. Pile response and dynamic impedance of single piles in vertical, horizontal and rocking loading. Dynamic response of pile groups to seismic loading. Interaction between piled foundation and superstructures. Case studies.