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A platform for research: civil engineering, architecture and urbanism
Reliability of corroded thin walled pipes repaired with composite overwrap
https://orcid.org/0000-0002-0887-8411
Abstract Current design codes provide two design methods: allowable stress/strain design and limit state design. Design in the current pipework composite repair codes is based on the allowable design method and only two safety factors are applied to the ultimate strain of the composite layer and to the yield stress of steel. On the other hand, safety factors are applied to each of the load and resistance parameters in the limit state design method. The limit state design method is probabilistic based in which the safety factors are calibrated based on a target reliability index. In this study, an investigation into the reliability of rehabilitated pipelines is conducted. The limit state function is defined based on ASME PCC-2, and reliability analysis is conducted using the AFOSM method. Results show that ASME PCC-2 generally provides adequate safety although the level of safety is not uniform for different percentages of corrosion. Comparing the achieved results and the ISO 2394 target reliability indices, some resistance factors are proposed.
Highlights Reliability of pipes repaired using composite wrap based on ASME PCC2 was investigated. ASME PCC2 design equations used for repair of pipes may not lead to uniform reliability. Resistance for steel and composite material were proposed. Resistance factors generally ensure uniform reliability for repaired pipes.
Reliability of corroded thin walled pipes repaired with composite overwrap
https://orcid.org/0000-0002-0887-8411
Abstract Current design codes provide two design methods: allowable stress/strain design and limit state design. Design in the current pipework composite repair codes is based on the allowable design method and only two safety factors are applied to the ultimate strain of the composite layer and to the yield stress of steel. On the other hand, safety factors are applied to each of the load and resistance parameters in the limit state design method. The limit state design method is probabilistic based in which the safety factors are calibrated based on a target reliability index. In this study, an investigation into the reliability of rehabilitated pipelines is conducted. The limit state function is defined based on ASME PCC-2, and reliability analysis is conducted using the AFOSM method. Results show that ASME PCC-2 generally provides adequate safety although the level of safety is not uniform for different percentages of corrosion. Comparing the achieved results and the ISO 2394 target reliability indices, some resistance factors are proposed.
Highlights Reliability of pipes repaired using composite wrap based on ASME PCC2 was investigated. ASME PCC2 design equations used for repair of pipes may not lead to uniform reliability. Resistance for steel and composite material were proposed. Resistance factors generally ensure uniform reliability for repaired pipes.
Reliability of corroded thin walled pipes repaired with composite overwrap
https://orcid.org/0000-0002-0887-8411
Abstract Current design codes provide two design methods: allowable stress/strain design and limit state design. Design in the current pipework composite repair codes is based on the allowable design method and only two safety factors are applied to the ultimate strain of the composite layer and to the yield stress of steel. On the other hand, safety factors are applied to each of the load and resistance parameters in the limit state design method. The limit state design method is probabilistic based in which the safety factors are calibrated based on a target reliability index. In this study, an investigation into the reliability of rehabilitated pipelines is conducted. The limit state function is defined based on ASME PCC-2, and reliability analysis is conducted using the AFOSM method. Results show that ASME PCC-2 generally provides adequate safety although the level of safety is not uniform for different percentages of corrosion. Comparing the achieved results and the ISO 2394 target reliability indices, some resistance factors are proposed.
Highlights Reliability of pipes repaired using composite wrap based on ASME PCC2 was investigated. ASME PCC2 design equations used for repair of pipes may not lead to uniform reliability. Resistance for steel and composite material were proposed. Resistance factors generally ensure uniform reliability for repaired pipes.
Reliability of corroded thin walled pipes repaired with composite overwrap
Saeed, Nariman (author) / Baji, Hassan (author) / Ronagh, Hamid (author)
Thin-Walled Structures ; 85 ; 201-206
2014-08-31
6 pages
Article (Journal)
Electronic Resource
English
Reliability of corroded thin walled pipes repaired with composite overwrap
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