• 한국안전학회지
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• 제16권4호
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• pp.147-152
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• 2001

The tower cranes are the very useful construction machine in the high place works. But they are very susceptible to the load balance, the wind load and the hanging load because they are the very slender structures and those center of gravity is located in the upper part. Therefore, the collapse accidents of tower one have repeatedly happened during the assemble or disassemble works. The correcting frame may has often used in order to correct the error in the setting of foundation anchors. The goal of this study is that propose the methods preventible the collapse accident of tower crane which is constructed by using the correcting frame. In order to accomplish the goal of this study, the field survey, the reference investigation and the structure analysis were performed for the collapse accident of tower crane using the correcting frame. This study result in the methods preventible the same accident.

• 한국기계가공학회지
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• 제21권2호
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• pp.31-38
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• 2022

Recently, the development of offshore wind farms based on past technical experiences from onshore wind turbine installations has become a worldwide issue. This study investigated the technical issues related to offshore wind farms and large-diameter monopiles from an economic perspective. In particular, the monopile foundation system (MFS), which is the most important part of the proposed fast construction system, is applied for the first time in Korea, and structural verification is essential because it supports large-diameter monopiles and is in charge of excavation. Therefore, in this study, a rapid construction system for large offshore wind power generators was introduced, and stability verification was performed through the structural analysis of the MFS.

• 한국구조물진단유지관리공학회 논문집
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• 제19권2호
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• pp.1-9
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• 2015

본 논문에서는 RC 기둥-기초 접합부분을 중공형 및 확장형 강재 Base Plate로 보강한 실험체에 대한 하중 재하 실험을 실시하여, 강재 Base Plate가 부착된 RC 기둥-기초에서의 뚫림전단에 대한 보강효과를 정량화 하기 위한 구조해석 및 기초적 실험 연구를 수행하였다. 실험은 각 실험체별 부착된 Base Plate의 두께, 내민길이, 치수, 형식 등의 변수에 따라 수행하였으며 실험을 통하여 응력분산에 적합한 적정 Base Plate의 모양 및 치수를 확인하였고, 보강효과에 대하여 분석하였다. 실험을 통해 Base Plate가 기초에 전해지는 수직하중의 응력분산에 효과적이었으며 폐쇄형보다 중공형 보강이 효율적인 것을 확인하였다. 보강을 통해 변위연성 능력의 향상으로 기존의 기초두께보다 두께가 감소한 실험체에서도 기존보다 높은 성능을 나타냈다. 보강 후의 실험체로부터 구조물의 거동특성을 취성으로부터 연성으로 유도 할 수 있었으며, 실험체를 파괴시까지 가력함으로써 파괴시 보강 전, 후에 대한 균열 및 파괴양상을 확인 하였다.

• 토지주택연구
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• 제3권2호
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• pp.177-185
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• 2012

LH공사는 기초설계 시 지반의 종류와 벽식공동주택의 층수에 따라 획일화된 PHC말뚝을 적용하고 있다. 최근 LH공사의 사업여건이 다양화됨에 따라 30층 이상의 벽식공동주택의 건설이 예상되고, 건설사업의 경쟁력 제고의 일환으로 건설공사비 절감이 지속적으로 요구되고 있어, 이의 일환으로 기초공사의 효율성 제고를 위한 노력이 필요하다. 이 연구에서는 LH공사에서 공급하는 벽식공동주택의 층수를 세분화하여 상부구조물에 대한 구조해석과 기초설계를 수행하였다. 기초설계 결과를 반영하여 벽식공동주택의 층수에 따른 경제성 평가를 수행하고 최적 PHC말뚝 직경을 제안하였다. 이 연구에서 제안한 벽식공동주택의 층수별 PHC말뚝 직경은 공사의 공동주택 기초설계 시 유용하게 활용될 수 있을 것으로 사료된다.

• 한국식품영양학회지
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• 제36권5호
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• pp.395-402
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• 2023

As the consumption of corn increases, the production of by-products is also increasing. In this study, functional substances and antioxidant activities of corn by-products were investigated to determine their applicability as functional materials. Total polyphenol, flavonoid contents, and ABTS antioxidant activity were the highest in leaves. The total phenolic acid content was the highest in cobs; p-coumaric and ferulic acid were the main components. Phytosterol content in leaves and stems was high at 64 and 50 days after sowing, 261.4 and 274.7 mg/100 g, respectively. β-sitosterol of the leaves and stems was the highest, 149.2 and 138.7 mg/100 g. The total phytosterol content of grains and by-products harvested 106 days after sowing was in the order of: corn silk, husk, grain, leaf, stem, and cob. Among the phytosterols, β-sitosterol was the highest, followed by stigmasterol and campesterol, and the composition was different depending on part. The total phytosterol content was the highest in husk and corn silk, but the stems and leaves, which account for 50% of the total corn biomass, also contained high phytosterol content. Therefore, corn leaves and stems are expected to be used as functional raw materials for the development of functional materials in the future.

• 과학교육연구지
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• 제38권1호
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• pp.78-95
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• 2014

일반적인 수업에서 도입부는 동기유발 기능을 담당하는 중요한 역할을 한다. 수학수업도 예외는 아니어서 도입부의 동기유발을 어떻게 구성했는가는 수업의 성패를 좌우하는 요소의 하나가 된다. 이 연구는 동기유발이라는 관점에서 수학수업 도입부 구성의 중요성을 인지하고, 현재 초등학교 교사들의 수학수업 도입부 운영방식을 살펴보고자 한다. 이를 위해 6학년 '원기둥의 부피'를 주제로 초등학교 현직 교사들이 작성한 19편의 지도안과 우수수업동영상 2편을 살펴보고, 수학수업 도입부 유형화 작업의 가능성을 탐색하였다. 지도안 및 수업동영상 분석 결과, 초등학교 수학과 수업 도입부의 7가지 유형이 확인되었으며, 초등학교 교사들이 운영하는 수학과 수업 도입부의 일반적인 특징과 문제점이 도출되었다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2004년도 가을 학술발표회 논문집
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• pp.163-170
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• 2004

The main objective of this research is to determine the optimal sections of infrastructure (the pier and foundation) for orthotropic steel decks which is a part of prefabricated passenger car overpasses. Since the bridge to be designed allows only passenger cars, design loads are determined according to this condition. The total volume of the infrastructure is formulated as the objective function and the design constraints are based on the 'Korean Bridge Design Code' and 'Design Manual of Steel Framed Pier'. The programs used in this research are MATLAB 6.5 and MIDAS CIVIL.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2008년도 추계학술대회
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• pp.98-101
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• 2008

The goal of this paper is to select and analyze the sound for robot which can help and serve the big retail market, as the part of research for design foundation development of Human Robot Interface. The sounds which are related with activity, such as thanks, reject, agony,absurdity, gladness, approval, were selected among targeted sounds with 2 step SD method. The result for using Quantitative analysis model-3 with psychological similar degree of selected sound was argued with 'the brightness of sound' and 'violent of sound'.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회 3차
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• pp.96-103
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• 2010

The GK immersed tunnel as a part of the Busan-Geoje Fixed Link Project, introduced the immersed tunnel method into Korea for the first time. This challeging project to be completed in 2010 will open a new era to link oceans of the world with optimized design and safety for future use. The immersed tunnel method would possibly suitable for use in construction of a sub sea tunnel from Korea to Japan and from Korea to China that could potentially be built in the distant future. We hope the techniques learned from the Busan-Geoje Fixed Link Project can be applied to further projects in the near future.

• 건축역사연구
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• 제23권4호
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• pp.81-90
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• 2014

This paper aimed to identify the variation of layout in Hwangnyoungsa buddhist temple site based on studying published the excavation research paper and texts related to layout. According to earlier studies, in 1st construction period(553~569) of Hwangnyoungsa, there were trisection spaces with one main hall and two corridors in inner part and then in 2nd period(584~645), unified one. But actually trisection spaces had been maintained until the middle part of 8th century. And in each space there was the main hall with large yard. That is the 2nd period layout of Hwangnyoungsa. For the attainment this result, each building remains are judged under duplicated situation which one was the previous and next by consideration of the construction condition and special features of foundation. Although the meaning of trisection system of Hwangnyoungsa is similar with the layout of ancient palace, it could be said to derive from accumulation excavation research in Silla's archeological site and such studies.