NDLI: Experimental Performance Estimate of a 40m PSC I Girder for Railway Bridges

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Experimental Performance Estimate of a 40m PSC I Girder for Railway Bridges

Content Provider	Semantic Scholar
Author	Yeo, Inho
Copyright Year	2013
Abstract	Abstract Here we report the results of an experimental laboratory test to verify the applicability to railway bridges of aPSC I girder of which the upper flange thickness was increased to improve sectional performance. The thicker this flangeis, the further upward the neutral axis is moved. If in this way the span length can be increased to 40m long, the bridge maybe constructed with four girders instead of five. Therefore, construction cost could be lowered by reducing the weight of thelong span structure due to increased sectional efficiency. It was also necessary to be certain that the dynamic performanceof this relatively flexible structure would be applicable to railway bridges. Therefore numerical analysis, as well as staticand dynamic tests, was carried out for a full-size PSC I girder. Based on these results, it was verified that the performanceof the PSC I railway bridge satisfied the performance criteria of the design code. Keywords : Railway bridge, PSC-I girder, Laboratory test, Dynamic performance, Performance criteria초록기존의 도로 및 철도교에 널리 사용되는 PSC I 거더의 단면성능을 향상시키기 위해 거더 중앙부 상부플랜지의 두께를 증대시켜 중립축을 상향으로 이동시키는 개념의 PSC I 거더의 철도교 적용을 위한 정/동적 성능을 시험실 시험을 통해 확인하였다. 이 개념의 PSC I 거더는 단면의 합리적 활용으로 거더의 경간장을 40m까지 연장하였으며 기존의 복선 철도교에 5주형이 사용되던 거더 본수를 4주형으로 줄여 건설비를 절감할 수 있다. 기존의 교량에 비해 장경간 경량화를 추구한 신형식 교량은 상대적으로 유연한 구조로 진동에 대해 사용성측면에서 취약할 수 있으므로 동적성능에 대한 검토가 필요하다. 40m길이의 실물크기 거더 모형시험을 통해 정/동적 물리량을 추정하고 이를 유한요소 해석결과와 비교하여 타당성을 입증한 후 철도교량의 전산해석을 통해철도설계기준에서 요구하고 있는 각종 동적 성능기준치의 부합여부를 확인 검증하였다. 주요어
Starting Page	394
Ending Page	401
Page Count	8
File Format	PDF HTM / HTML
DOI	10.7782/JKSR.2013.16.5.394
Volume Number	16
Alternate Webpage(s)	http://ocean.kisti.re.kr/downfile/volume/railway/HGCDCF/2013/v16n5/HGCDCF_2013_v16n5_394.pdf
Alternate Webpage(s)	https://doi.org/10.7782/JKSR.2013.16.5.394
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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