mfs project profile retrochek vdot 2014 · 2018-02-21 · title: microsoft word - mfs project...

PROJECT PROFILE Location: Grand Forks, MN MFS Project PM: Ricky Morgan, MInstNDT, AWS CWI, ASNT NDT Level III, ICC SSW Client Contacts: Minnesota DOT Date: November 2014 Metal Fatigue Solutions, Inc. 7251 West Lake Mead Boulevard Suite 300 Las Vegas, NV 89128 www.metal-fatigue-solutions.com RetroChek Inspection of VDOT Structure I-295 (NBL) Bridge #2028 over Beaverdam Creek Hanover County, VA Situation Metal Fatigue Solutions (MFS) worked with VDOT as part of a cooperative agreement to perform follow up retrofit and repair verification inspections on Bridge #2028 I-295 over Beaverdam Creek in Hanover County, Virginia. The Electrochemical Fatigue Sensor (EFS) system was used to determine the presence of growing cracks post repairs at selected locations in Spans 1 and 2. A total of 9 locations will have been interrogated, representing two different repair scenarios, at the completion of three inspections. All the inspection locations were chosen in collaboration with VDOT and MFS. The Electrochemical Fatigue Sensor-based RetroChek system was used in a follow up inspection to one which was executed with a similar system back in 2008, indicating active fatigue crack growth and microplasticity immediately following the retrofit contract execution. The 2014 inspection occurred after another repair contract was completed to further repair areas of active crack growth. Overall Conclusions and Findings Locations 1 and 2 were at the 3 rd Beam from West at the 1 st Diaphragm from the North on the Downstream or West Web Face, while Location 3 was at the 4th Beam from West at the1 st Diaphragm from the South on the Upstream or East Web Face. There were no visible cracks at any of the locations but at Location 3 there were two drill stops side by side at a potential stress riser to evaluate. Results from the RetroChek inspection indicate that additional repairs to the fatigue cracking areas have been successful in halting further propagation of the cracks during ambient loading. The EFS inspection was successful in collecting data used to determine the crack

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PROJECT PROFILE

Location: Grand Forks, MN MFS Project PM: Ricky Morgan, MInstNDT, AWS CWI, ASNT NDT Level III, ICC SSW Client Contacts: Minnesota DOT Date: November 2014 Metal Fatigue Solutions, Inc. 7251 West Lake Mead Boulevard Suite 300 Las Vegas, NV 89128 www.metal-fatigue-solutions.com

RetroChek Inspection of VDOT Structure I-295 (NBL) Br idge #2028 over Beaverdam Creek

Hanover County, VA Situation Metal Fatigue Solutions (MFS) worked with VDOT as part of a cooperative agreement to perform follow up retrofit and repair verification inspections on

Bridge #2028 I-295 over

Beaverdam Creek in

Hanover County,

Virginia. The

Electrochemical Fatigue Sensor (EFS) system was used to determine the presence of growing cracks post repairs at selected locations in Spans 1 and 2. A total of 9 locations will have been interrogated, representing two different repair scenarios, at the completion of three inspections. All the inspection locations were chosen in collaboration with VDOT and MFS. The Electrochemical Fatigue Sensor-based RetroChek system was used in a follow up inspection to one which was executed with a similar system back in 2008, indicating active fatigue crack growth and microplasticity immediately following the retrofit contract execution. The 2014 inspection occurred after another repair contract was completed to further repair areas of active crack growth.

Overall Conclusions and Findings Locations 1 and 2 were at the 3rd Beam from West at the 1st Diaphragm from the North on the Downstream or West Web Face, while Location 3 was at the 4th Beam from West at the1st Diaphragm from the South on the Upstream or East Web Face. There were no visible cracks at any of the locations but at Location 3 there were two drill stops side by side at a potential stress riser to evaluate. Results from the RetroChek inspection indicate that additional repairs to the fatigue cracking areas have been successful in halting further propagation of the cracks during ambient loading. The EFS inspection was successful in collecting data used to determine the crack

PROJECT PROFILE

growth activity of all inspection locations on VDOT I-295 (NBL) Bridge #2028, Hanover County, Virginia. The data used in the analysis was collected while all lanes of the bridge were open to ambient traffic.

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