大型桥梁钢—混接头状态监测及安全评估方法

刘纲; 黄宗明; 杨溥; 刘遥; 谢增银

doi:10.11835/j.issn.1674-4764.2009.03.017

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大型桥梁钢—混接头状态监测及安全评估方法

更新时间：2023-11-28

- 大型桥梁钢—混接头状态监测及安全评估方法
- New Monitoring and Assessment Method for the Joints of Steel and Concrete Connection in Largespan Bridge
- 土木与环境工程学报（中英文） 2009年31卷第3期页码：90-97
- 作者机构：
  
  1. ,重庆,400030
  2. 重庆大学土木工程学院
  3. 光电技术及系统教育部重点实验室,重庆,400030
- 作者简介：
- 基金信息：
  
  国家863计划资助项目（2006AA04Z433）
- DOI：10.11835/j.issn.1674-4764.2009.03.017
  中图分类号：
- 纸质出版：2009
- 稿件说明：
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刘纲, 黄宗明, 杨溥, 等. 大型桥梁钢—混接头状态监测及安全评估方法[J]. 土木与环境工程学报（中英文）, 2009,31(3):90-97.

LIU Gang, HUANG Zongming, YANG Pu, et al. New Monitoring and Assessment Method for the Joints of Steel and Concrete Connection in Largespan Bridge[J]. Journal of Civil and Environmental Engineering, 2009, 31(3): 90-97.
刘纲, 黄宗明, 杨溥, 等. 大型桥梁钢—混接头状态监测及安全评估方法[J]. 土木与环境工程学报（中英文）, 2009,31(3):90-97. DOI： 10.11835/j.issn.1674-4764.2009.03.017.

LIU Gang, HUANG Zongming, YANG Pu, et al. New Monitoring and Assessment Method for the Joints of Steel and Concrete Connection in Largespan Bridge[J]. Journal of Civil and Environmental Engineering, 2009, 31(3): 90-97. DOI： 10.11835/j.issn.1674-4764.2009.03.017.

摘要

钢混凝土结合段(钢混接头)是保证混合结构安全性能最为关键的结构部位，针对大型桥梁PBL剪力键加局部预应力束的钢混接头形式进行了状态监测及安全评估方法研究。分析该类构件的破坏机理，提出了区别于传统的监测参量。研究了PBL剪力键测点布置方案和监测参量的阈值，并考虑了环境、荷载和混凝土收缩徐变给局部预应力损失评估带来的不利影响。通过与试验数据的比照和对实桥监测数据的分析，结果表明新监测参量和评估方法具有可行性，对大型桥梁同类关键部位的健康监测提供了可供借鉴的方法。

Abstract

The joints of steel and concrete (JSC) is the key substructure to composite bridge

the method of condition monitoring and safety assessment were carried out for JSC with perfobond shear connectors (PBL) and local prestressed tendon in largespan bridge. According to the damage mechanism of JSC

new monitoring parameters were proposed. The sensor location layout and the assessment thresholds of PBL were addressed with the consideration of the disadvantage influences of environment

load and concrete creep to local prestressed loss assessment and validated by the static load experiment. Compared the experimental results with field monitoring data

it was found that the new monitoring parameters and new assessment method were feasible and can be used as reference to the same type connectors in largespan bridges.

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