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전준창,김석태,경갑수,이희현,Jeon, Jun Chang,Kim, Seok Tae,Kyung, Kab Soo,Lee, Hee Hyun 한국강구조학회 2002 韓國鋼構造學會 論文集 Vol.10 No.3
본 연구는 중소규모의 일반 강교량에 대한 고강도 강재의 적용성을 수치해석적으로 검토하기 위해 수행되었다. 강재의 항복강도, 일평균 트럭교통량 및 구조상세의 피로등급을 해석변수로 하여 AASHTO LRFD 설계기준의 한계상태를 만족하는 최소중량단면을 최적화 기법을 적용하여 산정하고 그 결과에 대해 고찰하였다. 또한, 교량의 거더 개수 및 경간길이의 변화가 고강도 강재의 적용성에 미치는 영향에 대해서도 검토하였다. 검토결과, 피로의 영향을 무시할 경우 강재의 항복강도 증가와 함께 강재중량이 감소하는 경향을 나타내어 강교량에 대한 고강도 강재의 적용 가능성을 확인하였으나, 고강도 강재를 보다 효율적으로 활용하기 위해서는 가장 지배적인 영향인자인 피로문제에 대한 적절한 대처가 필요함을 알 수 있었다. Numerical analyses have been carried out in order to check the applicability of high-strength steel to a medium-sized steel bridge. Using the yield strength of steel, Average Daily Truck Traffic (ADTT), and fatigue grade of structural detail as analytical parameters, the minimum weight sections that satisfy the limit states of the AASHTO LRFD design specification were determined through an optimization scheme. Likewise, the effects of the number of girders and span length on the applicability of high-strength steel were evaluated. Results show that high-strength steel may be employed in the steel bridge, since steel weight decreases with increasing yield strength regardless of the fatigue effect. Nonetheless, appropriate countermeasures against fatigue should be determined since it is a major factor in the effective use of high-strength steel in steel bridges.
교량받침 위치가 강상형교량 상부구조의 거동에 미치는 영향
전준창(Jun Chang Jeon),김상호(Sang Ho Kim),함호석(Ho Suk Ham),장동일(Dong Il Chang) 한국강구조학회 1995 韓國鋼構造學會誌 Vol.7 No.3
When a bridge is designed and constructed, engineers should consider many factors such as structural stability, economic efficiency and aesthetic viewpoint etc.. Especially, it is very important where bridges are constructed in the urban area like an over pass bridge and an urban expressway that have to be constructed in the restricted area. In the case of steel box girder bridge constructed in the restricted area, the bearing shoe is mostly installed at lower flange of main girder because this type is said to ensure the safety of the bridge. But, this method has to put up with several problems, which increase the volume of pier and heighten the vertical curve of the bridge. Therefore, one major topic of interests currently confronting bridge engineers is the location of bearing shoe in the steel box girder bridge to improve the sight and capacity of the bridge. This study is conducted in order to estimate the influences of the bearing shoe on the behaviors of the superstructure from the static and dynamic structural analysis and to determine the location of bearing shoe reasonably for steel box girder bridge. Then, structural behaviors of superstructure of 2-cell 3-continuous steel box girder bridge are discussed.
전준창 ( Jeon Jun-chang ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
This report describes the seismic strengthening of bridge structure in the viewpoint of field inspection, assessment procedure, and retrofit example. Detailed items of both field inspection and performance evaluation are summarized. Finally, based on the results of field inspection, an example of seismic strengthening of bridge structure is presented.