• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>First European Workshop on Structural Health Monitoring 2002, Jul 10-12, 2002, Cachan (Paris), France >Health Monitoring of PC-I Bridges in Michigan
【24h】

Health Monitoring of PC-I Bridges in Michigan

机译：密歇根州PC-I桥的健康监控

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 average age of the PC-I girder bridge stock in Michigan is approximately 27 years. They are also the structural system choice of new and replacement bridges in Michigan. In order to manage the health of the aging population, a monitoring procedure (HMP) was developed specifically for the prestressed concrete (PC) I-girder bridges in Michigan. In the HMP procedure an important task was to develop/recommend protection and repair techniques corresponding to each state of health. Currently in Michigan, health monitoring of bridges is based on a rating assigned upon visual inspections performed every two years. The rating is a condition state and assigned for each of the bridge components. In developing the HMP, detailed field inspections of numerous PC-I bridges were performed. These inspections concentrated on documenting the condition of the beam-end for the purposes of developing a vulnerability assessment procedure for the corrosion prone beam-ends. The PC-I girder vulnerability is described based on the condition of the beam-end, which can directly be determined from the bi-annual visual inspection reports. Analysis of the inspection database compiled from the qualitative inspection of 828 girders established the sequence and pattern of deterioration at the beam-end. In most cases the girder end defects were present right after the production. As part of the study a survey of US transportation were performed. None of the agencies appear to be using NDT as part of PC-I bridge inspections. Agencies are not focusing to the prestressed concrete I-beam ends during their inspections. Protection measures for the PC-I beam-ends most often used by agencies were surface treatments and sacrificial anode cathodic protection systems.
机译：密歇根州PC-I箱梁桥的平均车龄约为27岁。它们也是密歇根州新桥和替换桥的结构系统选择。为了管理人口老龄化的健康，专门针对密歇根州的预应力混凝土（PC）工字型桥梁开发了一种监控程序（HMP）。在HMP程序中，一项重要任务是开发/推荐与每种健康状况相对应的保护和修复技术。当前在密歇根州，桥梁的健康监测基于每两年进行一次目视检查而指定的等级。额定值是状态状态，并为每个桥组件分配。在开发HMP时，对许多PC-I桥进行了详细的现场检查。这些检查集中于记录梁端的状况，以便为易腐蚀的梁端制定脆弱性评估程序。 PC-1梁的脆弱性是根据梁端的情况来描述的，可以直接从半年的目视检查报告中确定。通过对828个大梁的定性检查所汇编的检查数据库进行分析，确定了梁端部变质的顺序和模式。在大多数情况下，梁端缺陷在生产后立即存在。作为研究的一部分，对美国运输进行了调查。似乎没有机构将NDT用作PC-I桥接检查的一部分。代理商在检查过程中没有将重点放在预应力混凝土工字梁的两端。代理商最常使用的PC-I梁端保护措施是表面处理和牺牲阳极阴极保护系统。

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