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폴리머 콘크리트 박막 교면포장 적용을 위한 실제 교량 정적 해석
정영도(Jeong Young Do),김준형(Kim Jun Hyung),이석홍(Lee Suck Hong),정진훈(Jeong Jin Hoon) 대한토목학회 2011 대한토목학회논문집 D Vol.31 No.3D
본 논문에서는 폴리머 콘크리트 박막 교면포장의 적용성을 알아보기 위한 하나의 방법으로 SMA(Stone Mastic Asphalt) 교면포장으로 시공된 실제 교량 및 이와 동일한 조건에서 교면포장을 박막의 폴리머 콘크리트로 대체한 가상의 교량에 대해 정적 해석을 실시하였다. 다양한 교량형식에 대한 평가를 위하여 SMA 교면포장으로 시공된 PSC(Prestressed Concrete) 거더교, 강박스 거더교, PSC 박스 거더교, RC(Reinforced Concrete) 라멘교를 해석하고 비교하였다. 바닥판과 교면포장은 완전히 접착된 것으로 가정하였으며 시공 중 발생한 응력과 처짐은 무시하고 교면포장의 자중과 차량하중으로 인하여 발생된 응력과 처짐을 분석하였다. 해석 결과 가벼운 단위중량과 앓은 두께로 포장지중이 더 작았던 폴리머 콘크리트를 사용한 교량의 응력과 처짐은 SMA를 시용한 교량보다 작은 것으로 해석되었다. 차량하중으로 인해 폴리머 콘크리트를 사용한 교량에 발생한 응력과 처짐은 앓은 포장 두께로 인한 단면이차모멘트의 감소 때문에 SMA를 사용한 교량보다 크게 나타났다. 포장의 지중과 차량하중이 동시에 작용하는 경우에는 지중 감소효과가 지배적으로 작용하여 폴리머 콘크리트를 사용한 교량의 응력과 처짐이 더 작게 나타났다. 향후 교면포장의 공용성 조사와 경제성 분석을 통한 비교 연구가 필요한 것으로 판단된다. In this paper, actual bridges constructed with SMA (Stone Mastic Asphalt) deck pavement and virtual bridges substituted the deck pavement with polymer concrete under the same conditions were statically analyzed to investigate applicability of the thin polymer concrete bridge deck pavements. PSC (prestressed Concrete) girder bridge, steel box girder bridge, PSC box girder bridge, and RC (Reinforced Concrete) rahmen bridge constructed with the SMA deck pavement were analyzed and compared to evaluate various types of the bridge. The bridge deck and pavement were assumed to be fully bonded and the stress and deformation during the construction were ignored while those due to pavement weight and vehicle loading were analyzed. According to the analysis results, the stress and deformation of the bridges using the polymer concrete due to the pavement weight were smaller than those using the SMA because of smaller self weight due to lighter unit weight and thinner thickness of the pavement. The stress and deformation of the bridges using the polymer concrete due to the vehicle loading were larger than those using the SMA because of the smaller area moment of inertia due to the thinner pavement thickness. In case that the pavement weight and vehicle loading applied simultaneously, the stress and deformation of the bridges using the polymer concrete were smaller because effect of self weight reduction was more dominant. Investigation of performance of the bridge deck pavement and analysis of economical efficiency are warranted.
단위부재의 Mock-up Test를 통한 접합분리 시험체의 압축강도 평가
정광식(Jung Kwang-Sik),기전도(Ki Jun-Do),김광기(Kim Kwang-Ki),김정진(Kim Jeong-Jin),이영도(Lee Young-Do),정상진(Jung Sang-Jin) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.5
Existing non-destructive test for evaluation of concrete compressive strength may show deviation in results analysis due to deterioration of precision by strength calibration and dry or humid condition by age, so there needs be testing method to determine long term structural internal force by collecting specimen with no damage of structure and measuring compressive strength through destruction test. This research applied to mock-up member the compressive strength evaluation method using joint separation mold that can plan and produce specimen cured in the same composition environment as concrete structure by attaching arbitrary(joint separation) to the form before concrete piling, and as a result, the management specimen was contrary to the hydration temperature of the member or was affected by external atmospheric temperature, however the joint separation specimen connected to structure and managed in the same environment showed a temperature curve similar to the member and decrease in temperature difference. Additionally, from initial age, with the compressive strength of joint separation specimen most similar to core strength, stable compressive strength can be evaluated up to design criteria strength 100㎫, so the method is proposed as an evaluation technique that can confirm highly reliable concrete quality.
정영도 ( Jeong Young Do ),엄기하 ( Eom Gi Ha ),장강석 ( Jang Kang Seok ),고효인 ( Koh Hyo In ),최기효 ( Choi Ki Hyo ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
In the case of railway bridges passing through the urban area, bridge type with excellent noise reduction performance is required. The bridges under development are steel composite through bridges, which is a composite structure of upper flanges with concrete, and the section bridges themselves, which surround the train, have the feature of acting as a sound barrier. In this paper, the performance test of air conduction noise is performed by the 20m full scale model test of new type steel composite through bridge.
정영도 ( Jeong Young Do ),최기효 ( Choi Ki Hyo ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
This paper deals with the H.A.S. method, which is the non-open excavation method by using steel pipe jacking method. In order to determine the lateral optimal placement of the support during the internal excavation, the commercial finite element program was used to analyze.
정영도 ( Jeong Young Do ),엄기하 ( Eom Gi Ha ),장강석 ( Jang Kang Seok ),홍병국 ( Hong Byung Kuk ),고효인 ( Koh Hyo In ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
In the case of steel railway bridges passing through the urban area, many civil complaints are being raised due to such a structure borne noise. A method of attaching a high-efficiency damping panel to a steel plate is proposed as a solution to the structure borne noise, but the behavior according to the exact adhesion rate is not shown. Therefore, in this paper, a basic study for applying a high efficiency damping panel to a steel railway bridges is to measure the mobility according to the adhesion rate of a high efficiency damping panel on a 1m × 1m steel plate.