Systematic Laboratory Test on Structural Performance of Corroded Reinforced Concrete and Its Utilization in Practice
Systematic Laboratory Test on Structural Performance of Corroded Reinforced Concrete and Its Utilization in Practice
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DOI：
10.1007/978-94-007-0677-4_7
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发表时间：
2011
影响因子：
5.5
通讯作者：
Takashi Yamamoto;M. Oyado;Y. Mikata;Koichi Kobayashi;T. Shimomura
中科院分区：
文献类型：
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作者：
Takashi Yamamoto;M. Oyado;Y. Mikata;Koichi Kobayashi;T. Shimomura
对锈蚀钢筋混凝土构件的承载性能进行了大量的加载试验。然而，很难找到腐蚀程度与承载能力之间的定量关系。这可能是由于受腐蚀钢筋的横截面积减小的不均匀性和实验技术的一些差异导致的载荷试验结果分散。这种结果的分散性也导致了数值分析目标选择的困难，这对于结构性能的估计是有用的。JSCE（Japan Society of Civil Engineers）331委员会按照常规试验程序对钢筋锈蚀破坏的钢筋混凝土梁的结构性能进行了系统的室内试验。普通试验的目的是为了抓住承载力结果分散的本质。在这项研究中，钢筋混凝土梁的弯曲性能，这是退化，由于氯离子的攻击，集中在不考虑剪切破坏或粘结破坏的受拉钢筋。普通试验结果表明，锈蚀失重率大时，锈蚀钢筋截面积的纵向离散度随锈蚀失重率的增大而增大，极易导致纵筋断裂破坏。
A great number of loading tests have been performed on load-carrying behaviour of RC members with the corroded reinforcing steel. However, it is difficult to find the quantitative relationship between the degree of corrosion and the loading capacity. This may be attributed to a scatter in the results of the loading test due to the non-uniformity in the reduced cross sectional area of the corroded reinforcement and some differences in the experimental technique. Such scatter of the results also leads to the difficulty in the selection of the target of the numerical analysis, which must be useful for the estimation of the structural performance. JSCE (Japan Society of Civil Engineers) Committee 331 conducted a systematic laboratory test on the structural performance of RC beam deteriorated by the corrosion of the reinforcement according to the common experimental procedure. The objectives of the common test are to grasp the essence of the scatter in the result of load-carrying capacity. In this study, the flexural behaviour of RC beam, which is degraded due to the chloride ion attack, was focused on without taking into consideration shear failure or bond failure of the tensile reinforcement. The results of the common test show that the large ratio of the corrosion weight loss was highly likely to induce the failure due to the fracture of the longitudinal reinforcement, because the longitudinal scatter in the cross-sectional area of corroded reinforcement increases as the corrosion loss increases.