Centrifugal modeling of dynamic soil-structure interaction

Miscellaneous · Sun Jan 01 00:00:00 EST 1989

OSTI ID:6908221

Weissman, K L

This dissertation presents a centrifuge model that can realistically represent soil-structure systems subjected to earthquake-like excitation. The model is validated by first characterizing the model system, second performing an in-depth experimental study of radiation damping and soil-structure interaction effects, and third performing a numerical analysis of the experimental results. The model system is characterized by performing free field experiments, scattered field experiments, and a preliminary soil-structure interaction experiment. The free field experiments examine the behavior of a horizontal soil layer during a simulated earthquake. The simulated earthquake, which is generated by the hammer-exciter plate method, is similar in amplitude and frequency content to a real earthquake. A confined soil sample can satisfactorily model a horizontal soil stratum of infinite lateral extent when the containment walls are lined with an absorptive material to attenuate wave reflections. The scattered field experiments focus on the effects of footing geometry on the input acceleration in a soil-structure system. The preliminary soil structure interaction experiment investigates the response of a rigid circular footing to a simulated earthquake. Radiation damping and soil-structure interaction effects shows that the centrifuge system can model soil-structure interaction phenomena. Experiments create a data pool, which demonstrates the influence of (1) the natural frequencies of the structure, (2) the foundation embedment, and (3) the foundation shape on radiation damping and soil-structure interaction effects for a structure on a layer of soil over bedrock during an earthquake. Results are consistent with established theories. The behavior of the centrifuge system can be modeled by established analytical procedures.

• Research Organization: Princeton Univ., NJ (USA)
• OSTI ID: 6908221
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING
POLICY AND ECONOMY
42 ENGINEERING
SOIL-STRUCTURE INTERACTIONS
SIMULATION
ANALYTICAL SOLUTION
CENTRIFUGES
EARTHQUAKES
FOUNDATIONS
FUNCTIONAL MODELS
NUMERICAL ANALYSIS
SOIL MECHANICS
CONCENTRATORS
MATHEMATICS
MECHANICAL STRUCTURES
MECHANICS
SEISMIC EVENTS
SUPPORTS
290300* - Energy Planning & Policy- Environment
Health
& Safety
420200 - Engineering- Facilities
Equipment
& Techniques