The residual cross section factor as a key parameter for the static evaluation of corroding reinforced concrete structures
The residual cross section factor as a key parameter for the static evaluation of corroding reinforced concrete structures
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残余截面系数作为腐蚀钢筋混凝土结构静力评估的关键参数
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Michael Raupach
中科院分区：
文献类型：
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作者：
J. Harnisch;Michael Raupach
本文介绍了锈蚀型钢混凝土构件静力评估的关键参数的发展。基于实验室条件和室外暴露条件下的大量试验，研究了高氯酸盐含量未开裂混凝土中钢筋的时间相关形态和残余截面的发展。为了实现这一目标，应用了一种使用光学三角测量原理的尖端传感器系统。在此基础上，提出了一种所谓的剩余截面因子。讨论了它的数值和时间相关性，并将其与进一步的形态关键参数联系起来，如腐蚀表面面积以及被腐蚀钢探头上的最大点蚀深度。提出并讨论了引入的点蚀因子与众所周知的点蚀因子的适用性。
In this paper the development of a key parameter for the static evaluation of corroding steel reinforced concrete members is presented. Based on an extensive test series under defined laboratory conditions as well as outdoor exposure the time dependent morphology and thus the development of the residual cross section of reinforcement steel embedded in uncracked concrete with high chloride contents has been investigated. In order to reach that goal a cutting edge sensor system using the principle of optical triangulation has been applied. Based on the obtained results a so called Residual Cross Section Factor has been developed. Its value and time dependency is discussed linking it to further morphological key parameters such as the corroding surface area as well as the maximum pitting depth on the corroded steel probe. The applicability of the introduced factor in comparison to the well known pitting factor is presented and discussed.