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Corrosion Tolerant Pre-Stressed Carbon Fiber Reinforced Polymer (CFRP) Fatigue Retrofits for Improved Waterway Lock Reliability, July 1, 2016 to September 15, 2018.
| 题名： | Corrosion Tolerant Pre-Stressed Carbon Fiber Reinforced Polymer (CFRP) Fatigue Retrofits for Improved Waterway Lock Reliability, July 1, 2016 to September 15, 2018. |
| 作者： | Lozano, C.; Langston, M.; Prinz, G. S. |
| 关键词： | Corrosion, Prestressed beams, Transportation infrastructure, Lock Reliability, Carbon fiber reinforced polymer (CFRP), Fatigue Retrofits, Waterway management, Safety benefits, Environmental Benefits Index, Economic benefits |
| 摘要： | Lock gates are an important part of the transportation infrastructure within the United States (US), having many economic, safety, and environmental benefits over rail and highway transportation systems. Unfortunately, many existing lock gates throughout the US have reached or exceeded their initial design life and require frequent repairs to remain in service. Unscheduled repairs often increase as gates age, having a local economic impact on freight transport which can create economic ripples throughout the nation. Fatigue and corrosion are key causes of unscheduled service interruptions, degrading lock gate components over time. Additionally, because lock gates are submerged during operation, crack detection prior to component failure can be difficult, and repair costs can be high. This report presents an analytical and experimental investigation into fatigue damage within common lock gate geometries, and develops fatigue mitigation strategies capable of extending gate service-life. The goal of the research program is to identify critical fatigue regions and locally extend gate component fatigue life. Detailed finite element analyses are combined with fatigue and fracture mechanics theories to predict critical fatigue regions within common gate details and develop retrofit strategies for mitigating fatigue cracking. Full-scale experimental fatigue testing of a critical lock gate component is conducted to provide a baseline for evaluation of retrofit strategies. Retrofit strategies using carbon fiber reinforced polymer (CFRP) plates having optimized pre-stress levels are discussed. |
| 报告类型： | 科技报告 |
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