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- 저자 : 박재일(Jae Yil Park) (검색결과 6 건)
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단순합성교의 합성효과에 따른 전단연결재의 거동에 관한 연구
박재일(Jae Yil Park),용환선(Hwan Sun Young),김석태(Seok Tae Kim),이세호(Se Ho Lee) 한국강구조학회 1997 韓國鋼構造學會誌 Vol.9 No.3
Generally, in a steel-concrete composite girder, the shear connector which was constructed between concrete deck and steel girder should have enough stiffness to behave as one body, because the conformity between plate and concrete deck is influences by the stiffness and spacing of the shear connector. If stiffness is insufficient. slip would happen at the contact surface. Partial interaction is the case that takes account of slip, and the other is complete interaction. In this paper, an easy method is presented to evaluate the stiffness or spacing of the shear connector according to the degree of imperfection without difficult calculations for a composite girder with partial interaction. Also, the horizontal shearing force applied to the shear connector and the longitudinal axial force, which is occurs at contact surface between concrete deck and steel girder, have been presented in a simple influence line that is various to the parameters of sectional properties, degree of imperfection and applied load points.
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섬유 및 강성 보강재료 기반 도시철도 내진성능 보강공법적용의 문제점 연구
하경화,박재일,강휘진,Ha, Kyoung Hwa,Park, Jae Yil,Kang, Hwi Jin 한국방재안전학회 2020 한국방재안전학회 논문집 Vol.13 No.1
국내 도시철도는 2005년 내진설계가 본격적으로 도입되었으며, 내진성능평가 및 보강방법에 대한 많은 연구가 이루어졌다. 2009년 3월 공포된 지진재해대책법 시행령(현 지진화산재해 대책법 시행령)에 따라 2010년4월~2013년10월까지 일부 지자체에서 도시철도 지하화 구간의 내진성능 상세 평가 및 보강방안을 수립하였다. 그 후, 2018년 말까지 공용기간이 오래된 구간에 대하여 기존 도시철도의 내진성능 평가를 수행하였으며, 기 연구된 방법을 적용하여 다양한 공법으로 보강공사를 시행하고 있다. 그러나 다양한 보강재료과 이를 사용한 공법이 연구되었지만, 현재 도시철도 보강공사에 적용되고 있는 공법에 대한 분류 실태연구는 미비하다. 본 연구의 목적은 현재 도시철도 내진성능보강 공사에 적용중인 사례를 분석하여, 공법별 특징 및 적용 사유와 문제점을 제시하는데 있다. In 2005, Urban railway seismic design was introduced in Rep. Of Korea, and many studies on seismic performance evaluation and reinforcement methods were conducted. In accordance with the Enforcement Decree of the Earthquake Disaster Countermeasures Act issued in March 2009, during April 2010 to October 2013, some of local governments established detailed evaluation and reinforcement measures for seismic performance of the urban railway underground structure. Afterwards, the seismic performance reinforcement of the existing urban railway structures was conducted for the sections that a long period of used until the end of 2018, and the reinforcement works are carried out by various methods using the previously studied methods. However, various reinforcing materials and construction methods using have been studied, but the classification research on the construction methods currently applied to reinforcement construction of urban railways is insufficient. The purpose of study is to analysis the cases currently applied to seismic reinforcement construction and to show the characteristics of each construction method, the reasons for its application and problems.
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불완전 합성율을 고려한 단순합성형의 합성거동에 관한 연구
용환선,김석태,박재일,Yong, Hwan Sun,Kim, Seok Tae,Park, Jae Yil 한국강구조학회 1997 韓國鋼構造學會 論文集 Vol.9 No.4
일반적으로 합성형 교량에 있어서 강판형과 콘크리트 슬래브 사이의 일체성은 강재와 콘크리트라는 이질재료의 접합부 사이에 위치한 전단연결재의 강성과 배치간격에 의해 영향을 받게 된다. 따라서 전단연결재는 두 재료가 일체로 거동할 수 있도록 충분한 강성을 가져야만 하며, 강성이 부족하게 되면 접촉면에서 미끄러짐이 발생한다. 이때, 미끄러짐의 발생을 고려한 것을 불완전합성형이라 한다. 본 논문에서는 불완전합성형의 해석에서 복잡한 계산과정을 거치지 않고 불완전율에 따라서 전단연결재의 강성과 간격을 산정하는 간이추정법에 대하여 연구하였으며, 단면과 지간에 따른 형특성, 불완전율, 하중작용점에 따라서 전단연결재에 작용하는 수평전단력, 축력 등의 변화양상을 간단한 영향선으로 나타내었다. 또한, 해석 예로서 Newmark의 partial interaction theory이론을 기초로 한 블완전합성형의 기초미분방정식을 적용하여 불완전율에 따라서 1) 스프링상수와의 관계 2) 축력 및 수평전단력과의 관계 3) 응력 및 중립축과의 관계를 고찰하였다. Generally, in a steel-concrete composite gilder, the shear connector which was constructed between concrete deck and steel girder should have enough stiffness to behave as one body, because the conformity between plate and concrete deck is influences by the stiffness and spacing of the shear connectors. If the stiffness of shear connectors are insufficient, slip would happen at the contact surface. Partial interaction is the case that takes account of slips. In this paper, an easy method is presented to evaluate the stiffness or spacing of the shear connector according to the degree of imperfection without difficult calculations for a composite gilder with partial interaction. Also, the horizontal shearing force applied to the shear connector and the longitudinal axial force, which is occurs at contact surface between concrete deck and steel girder, have been presented in a simple influence line that is various to the parameters of sectional properties, degree of imperfection and applied load points. Furthermore, through the case study, it determined the relationships between the degree of imperfection and the follows 1) spring constants 2) axial force and horizontal shearing force 3) stress and neutral axis by using the partial differential equation based on Newmark's Partial Interaction Theory.
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이승수(Sung Soo Lee),용환선(Hwan Sun Yong),김석태(Seok Tae Kim),박재일(Jae Yil Park) 한국강구조학회 1996 韓國鋼構造學會誌 Vol.8 No.2
The purpose of this paper is to provide a reasonable and economic method of the remaining life prediction for steel railroad short span bridge through compare the actual stress time history with simulated that. In this procedure the identified frequency distribution of stress range of the steel railroad bridge varies with the rational values of cutoff point and bar width. Thus, we show variable aspect of the equivalent stress range results from change cutoff point and bar width. And we analyze the variable of RMC and RMS model due to cut off point and bar width of the measured stress history influenced the prediction of fatigue life in the steel railroad bridge. The simulated stress time history is carried out by the superposition method incorporating the vertical load with rotation moment obtained from the Hemition interpolation function, and compared with developing stress results from measured maximum stress.
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