...
  • 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 >Assessing Corrosion Damage in Posttensioned Concrete Structures Using Acoustic Emission
【24h】

Assessing Corrosion Damage in Posttensioned Concrete Structures Using Acoustic Emission

机译：利用声发射评估后张混凝土结构的腐蚀损伤

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

The ingress of chlorides into posttensioned (PT) concrete structures is a leading cause of corrosion of the prestressing strands. This reduces the strength, durability, and service life of the structure and may result in catastrophic failure. A structural health monitoring (SHM) method is needed to improve the maintenance procedures associated with this method of construction. To evaluate the potential of acoustic emission monitoring for this application, long term corrosion monitoring tests were performed on specimens that were representative of internal and external posttensioning methods. Corrosion was induced in the specimens by adding chlorides to the grout and by performing wet/dry cycling with NaCl solution. The corrosion process was monitored by half-cell potential measurements (HCP) and acoustic emission (AE). Results show that AE has the ability to detect corrosion damage in the PT specimens with similar accuracy to HCP measurements. Furthermore, intensity analysis of the AE data shows that the damage in the PT specimens can be categorized according to the level of corrosion present. This investigation demonstrates that AE can be successfully implemented to detect, monitor, and quantify corrosion levels in PT concrete structures, and that AE is a promising nonintrusive method to detect and quantify corrosion in the absence of electrochemical techniques.
机译：氯化物进入后张应力（PT）混凝土结构是导致预应力钢绞线腐蚀的主要原因。这会降低结构的强度，耐用性和使用寿命，并可能导致灾难性故障。需要一种结构健康监测（SHM）方法来改善与此施工方法相关的维护程序。为了评估这种应用的声发射监测潜力，对代表内部和外部后张法的标本进行了长期腐蚀监测测试。通过向水泥浆中添加氯化物并用NaCl溶液进行干/湿循环，可在样品中引起腐蚀。通过半电池电位测量（HCP）和声发射（AE）监控腐蚀过程。结果表明，AE具有检测PT样品中腐蚀损坏的能力，其准确性与HCP测量相似。此外，对AE数据的强度分析表明，可以根据存在的腐蚀水平对PT样品中的损伤进行分类。这项研究表明，可以成功地使用AE来检测，监测和量化PT混凝土结构中的腐蚀程度，并且AE是在没有电化学技术的情况下检测和量化腐蚀的有前途的非侵入性方法。

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