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장승엽(Jang Seung Yup),양신추(Yang Sin-Chu),김정일(Kim Jeong Il),김태욱(Kim Tae Wook) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
Precast concrete slab track has been already turned out to be more efficient than cast-in place concrete slab track in view of the easiness of construction and the quality control of concrete. Thus, there is a great need to bring in the precast slab track system. In order to develop the realistic precast slab track system that is well conformed to our circumstances, the performance criteria of slab track, and the state-of-the art of precast slab track systems that are used in other countries are briefly discussed here.
등가 전단 스프링 모델을 이용한 플로팅 슬래브궤도 연결부에서의 하중전달 특성 분석
장승엽(Seung Yup Jang),안미경(Mi Kyoung Ahn),최원일(Won Il Choi ),박만호(Man Ho Park) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
Recently the floating slab track that can effectively mitigate the vibration and structure-borne noise is being discussed to be adopted. The floating slab track which is a track system isolated from the sub-structure by vibration isolators. Unsimilarly to conventional track and the slab deflection is large. Therefore the running safety and ride comfort should be investigated. Especially at slab joint since the load cannot be transferred the possibility that the dynamic behavior of track and train became unstable is high. Thus in general dowel bar are often installed at slab joints. To determine the appropriate dowel ratio the load transfer characteristics should be investigated. In this study dowel bar joint is modeled by equivalent shear spring and this model is verified by comparison with experimental results. Using the proven model the load transfer efficiency and deflection at slab joint according to dowel ratio and stiffness and spacing of vibration isolator were examined.