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首页> 外文会议>SP-230; International Symposium on Fiber-Reinforced Polymer(FRP) Reinforcement for Concrete Structures; 20051106-09; Kansas City,MI(US) >Performance of Corrosion-Damaged RC Columns Repaired by CFRP Sheets
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Performance of Corrosion-Damaged RC Columns Repaired by CFRP Sheets

机译：CFRP板修复的锈蚀钢筋混凝土柱的性能

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摘要

This study aimed to investigate the effectiveness of CFRP sheet in inhibiting the corrosion process of steel reinforcement embedded in RC columns. A total of 30 small-scale RC columns were conditioned under the accelerated corrosion process and then tested under uni-axial compression up to failure. Some of the columns were strengthened with CFRP sheets priorto the beginning of the accelerated corrosion process to simulate newly constructed RC columns wrapped with CFRP sheets. The others were strengthened with CFRP sheets after a certain period of the accelerated corrosion process to duplicate the corrosion-damaged RC columns to be repaired by wrapping with CFRP sheets. During the accelerated corrosion process, corrosion rate was monitored. The test results showed that although CFRP sheet wrapping decreased the corrosion rate, the corrosion of steel reinforcement could continue to occur. Based on the small-scale RC column tests, design guidelines were proposed and the proposed design guidelines were validated through test results of 4 mid-scale RC columns. The proposed design guidelines introduced a concept of equivalent area to account for the corrosion-damage such as internal cracking and cross-sectional loss of steel reinforcement.
机译：本研究旨在探讨CFRP板在抑制RC柱中嵌入的钢筋加固过程中的有效性。在加速腐蚀过程中对总共30根小型RC柱进行了处理，然后在单轴压缩下进行了测试，直至失效。在加速腐蚀过程开始之前，一些柱子用CFRP板加固，以模拟包裹有CFRP板的新建RC柱。在经过加速腐蚀过程的一定时期后，另一些则用CFRP板加固，以复制腐蚀损坏的RC柱，并用CFRP板包裹进行修复。在加速腐蚀过程中，监测腐蚀速率。测试结果表明，尽管CFRP片材包裹降低了腐蚀速率，但钢筋加固仍可能继续发生腐蚀。在小型RC柱试验的基础上，提出了设计指南，并通过4个中型RC柱的试验结果验证了所提出的设计指南。拟议的设计指南引入了等效面积的概念，以解决腐蚀破坏（例如内部裂缝和钢筋的横截面损失）的问题。

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