Nondestructive Evaluation of Fatigue Cracks in Steel Bridges Based on Thermoelastic Stress Measurement
Nondestructive Evaluation of Fatigue Cracks in Steel Bridges Based on Thermoelastic Stress Measurement
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基于热弹应力测量的钢桥疲劳裂纹无损评价
DOI：
10.1016/j.prostr.2016.06.267
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Taku Hanai
中科院分区：
文献类型：
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作者：
Takahide Sakagami;Yui Izumi;Daiki Shiozawa;Taisei Fujimoto,Yoshiaki Mizokami;Taku Hanai
长期存在的钢桥会出现疲劳裂纹，需要在钢桥的生命周期中立即进行检查、结构完整性评估或修复。作者提出了在钢桥生命周期的特定阶段采用红外热成像的无损检测和无损检测技术。本文介绍了钢桥疲劳裂纹周围应力场的远程测量，以进行结构完整性评估。此外，本文还展示了实验结果，证实了钢桥修复或加固后疲劳裂纹周围应力分布的严重程度降低。
Long-standing steel bridges suffer fatigue cracks, which necessitate immediate inspection, structural integrity evaluation or repair in the life cycle of steel bridges. The authors proposed NDT and NDE techniques employing infrared thermography at certain stage in the life cycle of steel bridges. This paper presents remote measurement of stress field around fatigue cracks in steel bridges for their structural integrity assessments. Further this paper shows experimental results confirming the severity reduction of stress distribution around fatigue cracks after the repair or reinforcement of steel bridges.