Advancement of Eddy Current Based Evaluation of Axial Force of High-Strength Bolts
Advancement of Eddy Current Based Evaluation of Axial Force of High-Strength Bolts
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DOI：
10.2749/prague.2022.1148
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Ayako Akutsu;E. Sasaki;Masayuki Tai;T. Shimozato
中科院分区：
文献类型：
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作者：
Ayako Akutsu;E. Sasaki;Masayuki Tai;T. Shimozato
高强度螺栓连接在钢桥中应用广泛。然而，在桥梁的使用寿命期间，由于许多原因，包括松弛、交通荷载和地震，螺栓轴力可能会减小。因此，剩余螺栓轴向力被认为是一个重要的不确定性因素。在以前的研究中，作者提出了一种使用涡流的轴向力评估方法。在这项研究中，应用建议的轴向力评估方法的实际测量，新的评估指标的可能性，减少测量误差和简化测量已被认为是。本文还对改进后的耐候钢高强度螺栓制造方法的适用性进行了检验.通过高强螺栓和耐候钢高强螺栓的试验，探讨了用新指标评价轴力引起的应力变化的可能性。
High-strength bolted joints are widely used in steel bridges. However, bolt axial force may decrease during the service life of a bridge for many reasons including relaxation, traffic load, and earthquake. Consequently, the remaining bolt axial force is considered a factor with uncertainty that is important to evaluate. In a previous study, the authors proposed an axial force evaluation method using eddy current. In this study, to apply the proposed axial force evaluation method to the actual measurements, new evaluation indices with the possibility of reducing measurement errors and simplifying measurement have been considered. The applicability of the improved method for high- strength bolts using weathering steel has also been examined. An experiment using both high- strength bolts and weathering steel high-strength bolts was conducted to investigate the possibility of evaluating the stress change due to the axial force with the new indices.