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Seismic Retrofitting Experience and Experiments in Illinois
Author(s) and Affiliation(s):
William L. Gamble and Neil M. Hawkins, Department of Civil Engineering University of Illinois at Urbana-Champaign, Urbana, IL Iraj I. Kaspar, Illinois Department of Transportation, Springfield, IL
Principal Investigator:
William L. Gamble and Neil M. Hawkins
Illinois Department of Transportation
Research Start Date:
September 1993
Expected Completion Date:
September 1997
Research Objectives:
The primary objective of this research is to provide information to the Illinois Department of Transportation about the strength and behavior of part of their existing stock of bridge piers which were designed without concern for seismic forces and deformations. A second objective is to provide data on the behavior of piers which were retrofitted in various ways in order to protect the lap splices which exist at the bases of most pier columns. Differential temperature effects will also be studied for the case of carbon fiber jackets, because of very large differences between the coefficients of thermal expansion of carbon fiber and the enclosed concrete, and because of the large temperature ranges which may be encountered in the Midwest.
Expected Products or Deliverables:
The study is expected to lead to improvements in existing retrofit design methods, and to greater confidence that the chosen retrofit will be adequate without being greatly in excess of the actual needs. Another expected product of the research will be guidance on the use of carbon fiber jackets in climates with very low minimum temperatures.

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