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Flexural behavior of strengthened concrete beams with corroding reinforcement

机译:锈蚀钢筋混凝土梁的抗弯性能

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摘要

This paper presents the results of an experimental investigation on a total of 30 under-reinforced concrete beams which were subjected to corrosion after the cover zone was replaced with different high-performance fiber reinforced cementitious composites. A power supply was used to induce different degrees of corrosion into reinforcement. The beams were then tested under four-point bending for their load-deflection relations. The results show significant reductions in flexural strength due to reinforcement corrosion. The beams cast with a cover containing 50/50 blend of brass coated and hooked steel fibers have the best flexural performance. The beams cast with a cover containing glass fiber showed the smallest amount of strength reduction and a reasonable ductile failure after corrosion.
机译:本文介绍了对总共30条钢筋混凝土梁进行腐蚀后的实验研究结果,这些钢筋混凝土梁的盖层区域被不同的高性能纤维增强水泥基复合材料所取代。使用电源将不同程度的腐蚀引入钢筋。然后在四点弯曲下测试梁的载荷-挠度关系。结果表明,由于钢筋腐蚀,弯曲强度显着降低。用覆盖层覆盖50/50的黄铜涂层和钩状钢纤维混合而成的梁具有最佳的弯曲性能。用包含玻璃纤维的覆盖物浇铸的梁在腐蚀后显示出最小的强度降低量和合理的延性破坏。

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