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https://hdl.handle.net/2142/83154
Description
Title
Seismic Behavior of Pile -Supported Bridges
Author(s)
Kornkasem, Wanchalearm
Issue Date
2001
Doctoral Committee Chair(s)
Foutch, Douglas A.
Department of Study
Civil Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
The presented modeling technique is applied for seismic analysis of an existing truss-arch bridge spanning across the Mississippi River in southern Illinois (the Cairo Bridge). The nonlinear time-history analysis is performed using input motions obtained from ground response analysis of bedrock motions artificially generated for the Cairo area. Comparison studies of dynamic characteristics and seismic response of the bridge obtained from the integrated model and those obtained from other foundation models (the fixed-base model, and the equivalent linear and nonlinear foundation spring models) are conducted. The results promote the use of the integrated model and emphasize the importance of the soil-structure interaction in seismic analysis of pile-supported bridges. The proposed model is applied to perform seismic performance evaluation of the Cairo Bridge for different excitation intensities and to identify an appropriate retrofit strategy for the bridge. Applications of the pile group model to investigate the behavior of retrofitted foundations and to develop a simple method of evaluating foundation characteristics are presented.
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