A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Non-Destructive Radiographic Evaluation and Repairs to Pre-Stressed Structures following Partial Collapse
This article presents use of radiographic imaging (X-Ray) in evaluation of existing reinforcing steel configuration of structures and development of steel retrofit and carbon fiber reinforced polymer (CFRP) repairs. A collapse of the driving surface in a precast concrete parking deck prompted an engineering evaluation and survey of the whole deck for damage assessment and repairs to distressed members. Distress was identified in decking members and perimeter spandrel beams. Repairs to the decking members involved supporting the distressed decking using supplemental steel brackets installed through the double-tee stems containing pre-stressing tendons. The precise location of the tendons in the stems needed to be identified to implement this repair in order not to damage the tendons during drilling. Radiographic X-ray imaging in this application enabled locating and avoiding the tendons in the stems to support and strengthen the decking member. The supplemental steel bracket also enabled continued operation of an existing expansion joint in the area of repair. The same technique was also used to identify steel reinforcement configuration in the spandrel beams exhibiting cracking at bearing locations for evaluation of existing steel configuration and implementation of CFRP repairs .
Non-Destructive Radiographic Evaluation and Repairs to Pre-Stressed Structures following Partial Collapse
This article presents use of radiographic imaging (X-Ray) in evaluation of existing reinforcing steel configuration of structures and development of steel retrofit and carbon fiber reinforced polymer (CFRP) repairs. A collapse of the driving surface in a precast concrete parking deck prompted an engineering evaluation and survey of the whole deck for damage assessment and repairs to distressed members. Distress was identified in decking members and perimeter spandrel beams. Repairs to the decking members involved supporting the distressed decking using supplemental steel brackets installed through the double-tee stems containing pre-stressing tendons. The precise location of the tendons in the stems needed to be identified to implement this repair in order not to damage the tendons during drilling. Radiographic X-ray imaging in this application enabled locating and avoiding the tendons in the stems to support and strengthen the decking member. The supplemental steel bracket also enabled continued operation of an existing expansion joint in the area of repair. The same technique was also used to identify steel reinforcement configuration in the spandrel beams exhibiting cracking at bearing locations for evaluation of existing steel configuration and implementation of CFRP repairs .
Non-Destructive Radiographic Evaluation and Repairs to Pre-Stressed Structures following Partial Collapse
Reis, E. M. (author) / Dilek, U. (author)
Sixth Congress on Forensic Engineering ; 2012 ; San Francisco, California, United States
Forensic Engineering 2012 ; 1015-1023
2012-11-13
Conference paper
Electronic Resource
English
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