• Journal of the Computational Structural Engineering Institute of Korea
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• v.29 no.2
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• pp.149-159
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• 2016

In this study, the solitary wave-induced tsunami force acting on an onshore bridges in coastal area was numerically modelled by means of TWOPM-3D based on Navier-Stokes solver and VOF method which can track free surface effectively. The validity of numerical analysis was verified by comparing the experimental tsunami bore force acting on vertical wall and column structure. In particular, the characteristics of tsunami force with the changing tsunami intensity were surveyed through numerical experiments. The availability of 3-dimensional numerical analysis was reviewed through the comparison between the existing numerical results and design criteria for each drag force coefficient by applying Morison equation considering only drag force. As reasonable and high-precision estimation method of tsunami force, it was suggested to apply the estimation method taking drag and inertial force into consideration at the same time.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.11a
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• pp.185-190
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• 2002

교량 공사는 우선 한강다리 건설공사만 해도 그간 많은 완성과 실패를 뉴스매체를 통해 보고 있다. 고속철도 공단주도의 경부고속철도 건설을 위한 교량은 수상, 육상 등 모든 부분에 적용되어 있다. 기존 교량에 대한 교통량 증가로 확장공사가 이루어지고 있기도 하다. 교량은 산업기반 시설이 되므로 규모가 크고 인력보다는 대형 건설기계가 소요된다 한국산업안전공단의 조사보고서(2002. 6)에 의하면 토목공사에서 18.7%의 사고율을 점하고 있고, 이중도로 9.9, 교량터널 1.1%을 점유하고 있다.(중략)

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.05a
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• pp.487-490
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• 2003

국가의 사회간접자본 시설확충 정책에 따라 교량공사의 건수는 계속 증가되어 오고있다. 교량공사는 수상공사, 육상공사로 나뉘고 다시 우물통기초, 교각, 상판공사로 분류될 수 있는데 상판공사 스틸박스거더, 콘크리트 박스거더 위에 설치되므로 물위에서 또는 땅 위에서의 높이가 수십m에 이르게 되어 추락했을 때 특히 위험하고 상판을 FCM공법으로 물위의 수십m 위에서 진행되는 경우가 대부분이다.(중략)

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.05a
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• pp.83-84
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• 2019

2019년 2월 28일, 선장의 음주와 잘못된 선박 운항으로 러시아 선박의 광안대교 충돌 사고가 발생하였다. 유례없던 대형 선박의 대교 충돌로 국민들의 관심이 집중되었으나, 계속적으로 국내외에서 해상교량 관련 해양사고는 발생하고 있다. 해상교량 관련 해양사고는 다른 사고와 달리 육상에도 큰 피해를 미칠 수 있다는 점에서 사고 예방을 위한 노력이 필수적이다. 따라서 본 연구에서는 최근 10년간의 국내 외 해상교량 관련 해양사고를 조사하여 사고에 영향을 미치는 요인을 식별하고 영향을 미치는 정도를 분석했으며, 추후에 해상교량 관련 해양사고 예방을 위한 대책 마련 연구 진행 시 기초자료로 활용할 수 있을 것이다.

• Geotechnical Engineering
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• v.27 no.2
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• pp.35-41
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• 2011

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.263-265
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• 2007

최근 지자체별로 민간투자에 의한 사회기반시설 확충을 추진하고, 육상의 도로망을 직선화 및 최적화 하기 위해 항만 및 주요 항로를 횡단하는 해상교량 건설이 활발히 추진되고 있다. 하지만 경제적인 측면만을 고려하여 계획함으로써, 장래 항만 발전과 해상교통안전 확보에 지장을 초래할 가능성이 크다. 아울러 장래 항만발전과 항만이용 안전에 미치는 영향이 지대함에도 항만운영 및 해상교통안전 확보관점에서 제시된 해상교량 건설기준이 없어, 교량규모 결정시 이해당사자간 갈등이 반복되고 있는 설정이다. 이에 본 연구에서는 현행 국내 해상교량 건설에 따른 문제점 및 기준설정의 필요성을 사례분석을 통해 제시한다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.232-239
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• 2001

Young Jong Grand Bridge is approach traffic road of New Inchon International Airport which covers hub airport function in northeast asia. The total span length of this bridge is $4,420{\cal}m$ and this main bridge type is, the first in the world, Double Deck Self Anchored Suspension Bridge, designed as double deck systems to be arranged by road and railroad. Approach bridges to be connected with main span also are composed double deck steel truss and steel box girder to consider a continuity with this span. Our company erected $1,375{\cal}m$(about 60,000tons) of double deck steel truss bridge type which is composed by 6 traffic lane on upper deck and 4 traffic lane and Double track railroad on lower deck. The original installation method of this bridge was planed to install about 75 meters bridge blocks to use floating crane, after temporary bent was constructed between permanent piers. But this method which had to construct many temporary bents in the sea had the matter that construction periods can become lengthen and construction cost can be risen. To overcome the uncertainty to ensure high qualify of bridge and economic project execution, our company developed new bridge erection method to assure both quality control and economic construction work. The new erection method which was developed by us was one that could transport and install long bridge block, $120{\cal}m$ unit at a time and that temporary bent was not required. We hope that this paper is used as technical data which will erect bridge in the western sea and others marine region.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.3A
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• pp.277-286
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• 2010

Derrick or caterpillar crane is generally used for the long-span/cable-stayed bridge construction by pre-cast segment lifting from over-land or water transportation. The heavy weight of them, however, could make defects on unstable under-construction structure and, furthermore a method of conventional segment transportation is also able to occur additional time and cost. In this study, in order to improve conventional construction method, the newly developed derrick crane is mainly considered. It could be not only eccentrically loadable on constructing girder but having rotatable boom for segment transportation from back-side. A series of construction stage using developed derrick crane is defined and also its numerical analysis is conducted. To reflect load characteristics of developed derrick crane on construction stage analysis, on/out of service load is separately calculated by considering vertical/lateral rotation range of boom and it is loaded on 4 fixed positions of crane. The derrick crane on this study could be time and cost saving solution for cable-stayed bridge construction and also make contributions to construction load reduction in its process.

• Journal of the Korean Society of Marine Environment & Safety
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• v.15 no.2
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• pp.119-125
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• 2009

Recently the construction of bridges crossing navigable waterways is being promoted aiming at expanding social infrastructure and optimizing the overland routes through private investment. The construction, however, tends to focus on more the commercial requirements than the marine safety and efficient port management that it has a big risk not only to fail in ensuring the safety of ship traffic, but also to muse some severe conflicts between the parties concerned. These problems result from the lacking of standards about the design guidelines and discussing process considering the marine traffic safety when designing bridges. This research attempts to show the problems mused by bridge construction and suggest the standard discussing process through the survey and process analysis on Kwangyang Bridge and Incheon Bridge.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.04a
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• pp.569-572
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• 2008

A series of the field inspection and the test have been performed on 297 existing bridges, in order to evaluate the bridges since 1995. In this study, based on the test results of the in-depth inspection, the identification of the extent of the chloride content and the incidence of the carbonation depth was conducted, and construction age and member type, environment condition were considered in this analysis. According to simple regression of the tested carbonation depth, the carbonation rate coefficient of the bridges in metropolises was estimated 5.41 and greater than 3.89 and 1.91 in case of marine condition and etc respectively. After measuring chloride content in concrete member, it was concluded that the chloride content of the bridges in marine condition was 4.7 times greater than the others. Especially, slabs had the most highly chloride content and it was estimated 0.709 $kg/m^3$