基于模态测试技术的混凝土轨枕结构完整性评估

Structural Integrity Assessment of Concrete Sleepers by Modal Test Technique.

作者信息

Choi Jung-Youl, Shin Tae-Hyung, Kim Sun-Hee, Chung Jee-Seung

机构信息

Department of Construction Engineering, Dongyang University, No. 145 Dongyangdae-ro, Punggi-eup, Yeongju-si 36040, Gyeongsangbuk-do, Republic of Korea.

Engineering HQ, Seoul Metro 5, Hyoryeong-ro, Seocho-gu, Seoul 06693, Republic of Korea.

出版信息

Materials (Basel). 2023 Aug 14;16(16):5614. doi: 10.3390/ma16165614.

DOI:10.3390/ma16165614

PMID:37629905

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10456519/

Abstract

Concrete sleepers used in railway engineering are subject to damage, such as cracks and breakage. Damaged concrete sleepers undergo changes to their material and structural properties, including response, mode shape, and natural frequency. Therefore, we have proposed modal testing in this study to quantitatively evaluate the structural integrity of concrete sleepers. The results of modal testing were compared with those of numerical analysis and visual inspection. In addition, an impact hammer test was conducted to evaluate the structural performance of damaged concrete sleepers. The results show that natural-frequency analysis using the modal-testing technique can usefully complement visual inspection for structural performance evaluation in the field.

摘要

铁路工程中使用的混凝土轨枕容易受到损坏，如出现裂缝和断裂。受损的混凝土轨枕在材料和结构性能方面会发生变化，包括响应、振型和固有频率。因此，我们在本研究中提出了模态测试，以定量评估混凝土轨枕的结构完整性。将模态测试结果与数值分析和目视检查结果进行了比较。此外，还进行了冲击锤试验，以评估受损混凝土轨枕的结构性能。结果表明，使用模态测试技术进行固有频率分析能够有效地补充现场结构性能评估中的目视检查。