Seismic Retrofit Deesign Criteria
1.1 INTRODUCTION The Ministry of Transportation (MoT) has established a seismic risk reduction policy for all
highway bridges in British Columbia. This policy includes the following initiatives:
- Stringent earthquake design standards for planned new bridges. - A program of “seismic retrofitting” to improve the earthquake resistance of existing
structures. MoT has designed bridges to meet stringent earthquake design standards since 1983. These newer bridges may sustain damage, but are not expected to collapse in a major earthquake. Those structures designed or built prior to 1983 are considered potentially vulnerable to collapse or major damage from earthquakes.
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