Instrumentation of the Grand-Mere Bridge During Strengthening


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Title: Instrumentation of the Grand-Mere Bridge During Strengthening

Author(s): B. Massicotte and A. Picard

Publication: Special Publication

Volume: 143


Appears on pages(s): 59-80

Keywords: bridges (structures); field tests; girders; instruments; prestressed concrete; segmental construction; strengthening; Construction

Date: 5/1/1994

Describes details of an extensive monitoring program carried out during the strengthening of the Grand Mere Bridge, a cast-in-place post-tensioned segmental box girder structure built in 1977. The testing program comprised various measurements taken before, during, and after the prestressing application. Electrical strain gages, mechanical strain gages, vibrating wire gages, and thermocouples were among the measuring instruments used. A bridge testing data acquisition system in a vehicle and an autonomous data acquisition system were used, together with manual reading devices. The field measurement program was carried out during strengthening. Some instruments used allow the monitoring of the bridge over a long-term period.