한국철도학회:학술대회논문집 (Proceedings of the KSR Conference)
- 한국철도학회 2001년도 추계학술대회 논문집
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- Pages.304-309
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- 2001
판형교의 고유진동수 특성에 관한 연구
A Study on the Characteristic of Natural Frequencies of Railway Plate Girder Bridges
초록
Natural frequencies are studied for dynamic analysis of plate girder bridges which are made up about 34% in the existing railway bridges in Korea. In this study, standard plate girder bridges designed by L-22, a standard load type of the railway specification in Korea, are modeled for finite element method analysis. SAP2000n, a commercial finite element method analysis tool, is used for structural analyses and evaluations. Span lengths of Plate girders have 7 types : 6m, 9m, 12m, 15m, 22m, 24m, and 30m. Natural frequencies are considered in mass rations and span lengths and they are compared with a recommendation of UIC 776-1R for alterations, from now on, in train conditions of operation. For changes of natural frequencies in plate girders by damages of structures, Parameter studies are accomplished.
키워드