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앵커공법을 적용한 기존 콘크리트 중력식 댐의 내진성능 보강방안
김용곤 ( Yon Gon Kim ),김세일 ( Se Il Kim ),옥승용 ( Seung Yong Ok ) 한국안전학회(구 한국산업안전학회) 2013 한국안전학회지 Vol.28 No.5
This paper describes the assessment of seismic performance of the concrete gravity dam seismically reinforced by post-tensioned anchors. In order to evaluate the seismic performance, the response spectrum analyses have been carried out for 7 different configurations of the post-tensioned anchors, and then their performance improvement in the maximum tensile and compressive stresses is compared to each other. The comparative results demonstrate that the layout of the post-tensioned anchors strongly influences the seismic performance of the concrete gravity dam. In this study, the slightly-inclined vertical anchorage system shows the largest improvement on the overall performance of the seismically-¬excited concrete gravity dam.
백신원 ( Shin Won Paik ),김용곤 ( Yon Gon Kim ) 한국안전학회(구 한국산업안전학회) 2012 한국안전학회지 Vol.27 No.6
Steel lining board usually is used as a floor on the temporary steel bridges. It also is installed in the subway construction site. However, in particular in subway construction, renovations and site of old bridges, these steel lining board structures have a problem such as noise, accidents and slip hazards. So steel composite lining board is being developed to solve this problem. Steel. composite lining board consists of compressive concrete showing excel-lent performance in slip, durability, resistance and noise, lower tensile and shear steel showing high safety, effective and superior workability in many respects. Steel composite lining board structure gradually is used in many construction sites, because it has a high quality such as durability, little noise and slip. In this study, flexural tests of steel composite lining board in accordance with welding patterns were conducted to compare the performance of the structure.
엄정현,박현희,서동선,허웅,김준범,김용곤,Eom, Jung-Hyun,Park, Hyun-Hee,Seo, Dong-Sun,Huh, Woong,Kim, Joon-Bum,Kim, Yon-Gon 한국전기전자학회 1998 전기전자학회논문지 Vol.2 No.1
고속도로 등의 대형 구조물의 표면 요철을 측정하기 위한 높은 반복율의 광학적 근 거리 측정기를 개발하였다. 삼각 측정법의 원리에 의한 거리 계측을 위해, 광원으로는 발광 다이오드를 사용하였으며 물체에서 반사된 광의 각도 검출기로는 1차원 위치 감응 광 검출기를 사용하였다. 개발된 거리 측정기는 물체의 반사율 변화를 극복하기 위한 자동 전력 조절 기능과 일정한 배경 광잡음은 물론 시간에 대해 변하는 배경 광잡음까지도 제거할 수 있는 전기적 배경잡음 제거기능을 갖고 있다. 거리 측정기의 장착 및 요철의 깊이를 고려하여 설정된 $22{\sim}38cm$의 측정거리에 대한 실험결과, 물체의 반사율에 관계없이 ${\pm}1.5mm$ 이내의 측정오차를 보였다. We develope a high repetition rate, short distance, optical range finder for surface roughness measurements of large structures, such as a highway road, etc. For range measurement based on a triangulation principle, we use a light emitting diode and an one dimensional Position sensitive photodetector for a light source and an angle detector of the reflected light at the object, respectively. The range finder has automatic power control and electrical background noise rejection capabilities which enable it to overcome variations of an object reflectance and to eliminate time-varying, as well as constant, background light noises. Our experimental results show less than ${\pm}1.5mm$ of measurement errors regardless of an object reflectance, for $22{\sim}38cm$ object ranges which are determined by considering the installation of the range finder and the depth of surface roughness.
콘크리트보수용 접착제를 이용한 Anchor Bolt의 인발지지력 산정에 관한 실험적 연구
김용곤 한국산업안전학회 2002 한국안전학회지 Vol.17 No.2
A research on the performance of retrofit anchors was conducted using adhesives for rehabilitation. From the pull-out tests of the chemical anchors, the effect of the hole diameter, spacer, temperature, moisture, embedment depth, and aging time were investigated. The spacer did not directly increased the pull-out load but increased post-yielding resistance therefore the ductility of the retrofit anchors. When the hole was cleaned and dried after the immersion, the pull-out load was greatly increased compared to the wet hole. A design equation was proposed depending on the embedment depth of the anchor bolt.