This paper presents and overview of the What?, Why? and How? Of the following topics:

1. Development of site specific time histories, response spectra, and seismic acceleration maps;
2. Field testing (ambient vibrations) of long and short span bridges;
3. One-dimensional to three-dimensional computer modeling of short and long span bridges;
4. Seismic evaluation of bridges; and
5. Retrofit of bridges.

The aforementioned topics will be presented via case studies on long span bridges over the Ohio River, and on short span bridges in Western Kentucky.

¹Professor of Civil Engineering, and Head, Structures Section, Kentucky Transportation Center
371 CE/KTC Building
University of Kentucky
Lexington, Kentucky 40506-0046
USA
Tel: (606) 257-3116
FAX: (606) 257-1815
e-mail: iharik@engr.uky.edu

²Visiting Professor, Kentucky Transportation Center, University of Kentucky

³Transportation Engineer, Branch Manager for Bridge maintenance, Kentucky Transportation Cabinet

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