Location

London

Event Website

http://www.csce2016.ca/

Description

A proof load test was performed on a fire-damaged bridge in October 2008 and its load capacity was confirmed. The bridge was then re-opened for full traffic shortly after the load test. It was further repaired in 2009 which included concrete patching and carbon fibre reinforced polymer (CFRP) warping of 6 girders in the main span. The bridge is located at one of the busiest highways of the country with many heavy trucks passing daily. Also, reinforced concrete could deteriorate much faster than usual after the fire accident. In 2014, the Bridge Office was requested to re-test the bridge in order to re-confirm its performance. The re-testing of the bridge was carried out in November 2014, 6 years after the first load test. The objective of this test was to re-confirm the bridge performance. Therefore, strain gauges and linear voltage displacement transducers (LVDT) were installed on the bridge at the locations almost identical to that installed in 2008’s load test. The applied loads were also similar to that from the original load test. This second load test was successfully completed and the load effects from both load tests were compared. It was observed that the bridge performances in 2008 and 2014 were similar. Therefore, the conclusions from the 2008 load test are still applicable.


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Jun 1st, 12:00 AM Jun 4th, 12:00 AM

STR-808: RE-TESTING OF A FIRE-DAMAGED BRIDGE

London

A proof load test was performed on a fire-damaged bridge in October 2008 and its load capacity was confirmed. The bridge was then re-opened for full traffic shortly after the load test. It was further repaired in 2009 which included concrete patching and carbon fibre reinforced polymer (CFRP) warping of 6 girders in the main span. The bridge is located at one of the busiest highways of the country with many heavy trucks passing daily. Also, reinforced concrete could deteriorate much faster than usual after the fire accident. In 2014, the Bridge Office was requested to re-test the bridge in order to re-confirm its performance. The re-testing of the bridge was carried out in November 2014, 6 years after the first load test. The objective of this test was to re-confirm the bridge performance. Therefore, strain gauges and linear voltage displacement transducers (LVDT) were installed on the bridge at the locations almost identical to that installed in 2008’s load test. The applied loads were also similar to that from the original load test. This second load test was successfully completed and the load effects from both load tests were compared. It was observed that the bridge performances in 2008 and 2014 were similar. Therefore, the conclusions from the 2008 load test are still applicable.

http://ir.lib.uwo.ca/csce2016/London/Structural/4