• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of materials in civil engineering >Accelerated Life Testing of Reinforced Concrete Based on Performance Degradation and Reliability Modeling
【24h】

Accelerated Life Testing of Reinforced Concrete Based on Performance Degradation and Reliability Modeling

机译：基于性能退化和可靠性建模的钢筋混凝土加速寿命试验

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper proposes a design for a testing program for accelerated life testing of reinforced concrete in the sulfite saline soil area. According to the situation of saline soil area, a constant current was used to accelerate the corrosion of steel rebar, and the wet sand with complex salt solution was used as electrolyte. The accelerated life testing was carried out, and a certain amount of accelerated life data was collected using electrochemical technique. By using scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and X-ray photoelectron spectroscopy (XPS), the microstructure and composition of corrosion products were analyzed. According to present codes, the critical corrosion current density of reinforced concrete was obtained. The linear model and exponential model were used to fit the average value of data corresponding to each time point respectively. Furthermore, based on the Wiener stochastic process, a reliability model for the degradation of reinforced concrete was established, and the accelerated life of reinforced concrete specimens was predicted. The results showed that the experimental scheme can effectively simulate the natural corrosion state of steel rebar in the sulfite saline soil area of western China. Corrosion current density can be used as the key factor for the durability deterioration of reinforced concrete specimens, and it can be used to judge the corrosion state of the reinforced concrete. Wiener stochastic process can effectively describe the durability degradation process of reinforced concrete specimens. By integrating the life data of the degradation process, the accelerated life reliability function established by this method can directly reflect the accelerated life of the specimen. The method is simple in calculation, and has certain value of popularization and application.
机译：本文提出了一种用于亚硫酸盐渍土地区钢筋混凝土加速寿命测试的测试程序设计。根据盐碱地的情况，采用恒流加速钢筋腐蚀，以含盐溶液的湿砂为电解质。进行了加速寿命测试，并使用电化学技术收集了一定数量的加速寿命数据。通过使用扫描电子显微镜（SEM），能量色散光谱仪（EDS）和X射线光电子能谱（XPS），分析了腐蚀产物的微观结构和组成。根据现行规范，获得了钢筋混凝土的临界腐蚀电流密度。使用线性模型和指数模型分别拟合每个时间点的数据平均值。此外，基于维纳随机过程，建立了钢筋混凝土退化的可靠性模型，并预测了钢筋混凝土试件的加速寿命。结果表明，该试验方案能够有效模拟中国西部亚硫酸盐土地区的钢筋自然腐蚀状态。腐蚀电流密度可以作为钢筋混凝土试件耐久性下降的关键因素，并可以用来判断钢筋混凝土的腐蚀状态。维纳随机过程可以有效地描述钢筋混凝土试样的耐久性退化过程。通过整合降解过程的寿命数据，该方法建立的加速寿命可靠性函数可以直接反映样品的加速寿命。该方法计算简单，具有一定的推广应用价值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号