• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.287-289
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• 2007

최근 우리나라 여러 주요 항만에 해상교량의 건설이 진행 중이거나 계획 중에 있는데, 이들 교량의 설치 위치나 규모가 주로 경제적인 측면만을 강조하여 이루어짐으로써, 선박 통항안전에 위협을 주고 있으며, 이해 당사자 간의 갈등이 고조되고 있는 현실이다. 이에 본 연구에서는 국내 해상교량 관련 법령과 절차에 대한 조사 및 연구를 통하여 현행 제도에 대한 문제점을 파악해 보고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.290-292
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• 2007

최근 우리나라 여러 주요 항만에 해상교량의 건설이 진행 중이거나 계획 중에 있는데, 이들 교량의 설치 위치나 규모가 주로 경제적인 측면만을 강조하여 이루어짐으로써, 선박 통항안전에 위협을 주고 있으며, 이해 당사자 간의 갈등이 고조되고 있는 현실이다. 따라서 이 연구에서는 국내에서 해상교량 건설시 사전에 수행되어지는 SHS(Ship Handling Simulation)에 관한 수행기관별 평가기법에 대하여 조사하고 분석한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.189-191
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• 2007

국내에는 규모가 큰 다리가 준공 중이거나 완공되고 있다. 또한 교량에서 발생되는 정보들은 중앙통제소에서 수집 및 제어 계측을 하고 있다. 따라서 본 연구에서는 교량에서 발생할 수 있는 각종 정보 및 사고경보를 쉽고 빠르게 모니터링 하기 위해 Labview 프로그램을 이용한 교량 모니터링 시스템을 설계 및 구현하였다.

• 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.

• Journal of the Earthquake Engineering Society of Korea
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• v.1 no.2
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• pp.17-29
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• 1997

Single-mode spectral analysis method is usually applied to a small-scale bridges with the simple geometric shape and uses only fundamental period to estimate the elastic earthquake forces and the displacements of the substructure. On the other hand, multi-mode spectral analysis method may be used instead if the possibilities of potential damage are developed when considering significance, scale, and geometric shape of briages. Since the dynamic responses of bridge can be significantly different depending on the modeling techniques for the restraint and support conditions etc, it may be misled to the unexpected results. In this study the dynamic analysis program which can model and analyze the bridge as a two- or three-dimensional framed structure is developed and verified with the results of other reliable program. Using this program together with the post processor, the designer can easily and readily obtain the reponses(moments, base shears, and displacements)of bridges necessary to design purpose. And further from the analysis results according to the variations of type, scale, and restraint and supprot conditions of bridges including sectional properties, applications of the effective and desirable seismic design are presented.

• Journal of the Korea institute for structural maintenance and inspection
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• v.21 no.4
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• pp.61-68
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• 2017

Bridge decks are members that rapidly deteriorated due to various environmental factors such as heavy vehicle and deicing salt, etc. As the lifespan of bridges built in Korea increases, it is expected that the demand for replacing the deteriorated bridge decks will increase. In other countries, Accelerated Bridge Construction technology using precast decks is already actively being used as a countermeasure for replacement demand of deteriorated bridge decks. In this study, bridge decks deterioration models are proposed by collecting and analysing the condition index data of domestic bridge decks. Also, the future replacement demands of deteriorated bridge decks in terms of replacement time and replacement scale are predicted.

• Journal of the Korea institute for structural maintenance and inspection
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• v.25 no.6
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• pp.1-11
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• 2021

As the aging of large domestic SOC facilities accelerates, facility maintenance is also changing from safety evaluation based on the current condition to performance-oriented preventive and preemptive maintenance based on the prediction of the level of future obsolescence. In particular, in the case of bridges, class 1 and 2 bridges are systematically managed along with many studies, but for small and medium-sized class 3 bridges there is no collection and utilization of historical data presenting performance degradation during their service life. Therefore, in this study, 3D model-based demonstration DB system was designed and developed to intuitively check the damage change rate at the damage location by registering the maintenance history by life cycle for each member's exterior damage in the 3D bridge object and to enable API-based comprehensive performance evaluation.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.296-298
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• 2007

국내 해상교량에 건설에 있어서 일반적인 절계 기준에 대한 제도가 정착되지 않아 항만을 이용하는 관계자와 해상교량을 건설하는 주체와의 갈등이 지속적으로 반복되고 있는 실정이다. 이는 항만 이용자 측면에서는 항만의 경쟁력 확보를 위해 선박 통항에 지장을 초래할 수 있는 해상교량에 대해 보다 엄격한 설계 조건을 요구할 수밖에 없고, 반면 해상교량 건설자 입장에서는 교량 건설에 따른 경제성을 고려해야 하므로 일정 규모 이상의 교량건설이 현실적으로 불가능하기 때문이다. 본 연구에서는 국내외 해상교량 관련 기준 및 절차 등에 대한 분석을 기초로 설계 기준 초안을 작성하여 해상교량 건설 관계자(항만협회, 건설교통부, 건설회사, 지차체 등)와 항만 이용자(도선사협회, 선박회사 등), 그리고 해양계열 대학 전문가의 의견을 충분히 수립하여 국내 실정에 적합한 해상교량 설계 기준안을 제시하고자 한다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.23 no.2
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• pp.67-74
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• 2019

In this paper the response factor is investigated for middle and small size-RC slab aged bridges. The response factor consists of static and dynamic response factors and is a main parameter in the frequency based-bridge load carrying capacity prediction model. Static and dynamic response factors are determined based on the frequency variation and the impact factor variation respectively between current and previous (or design) states of bridges. Here, the impact factor variation is figured out using the impact factor response spectrum which provides the impact factor according to the natural frequency of bridges. In this study, four actual RC slab bridges aged over 30 years after construction are considered and their span length is 12m. The dynamic loading test in field using a dump truck and eigenvalue analysis with FE models are conducted to identify the current and previous (or design) state-natural frequencies of the bridges, respectively. For more realistic considerations in the moving loading situation, the impact factor response spectrum is developed based on tri-axle moving loads representing the dump truck load distribution and various supporting conditions such as simply supported and both ends fixed conditions. From the results, the response factor is widely ranged from 0.21to 0.91, showing that the static response factor contributes significantly on the results while the dynamic response factor has a small effect on the result. Compared to the results obtained from the impact factor response spectrum based on the single axle-simply supported condition, the maximum percentage difference of the response factors is below 3.2% only.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.11
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• pp.130-137
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• 2017

To maintain traffic safety during the target lifetime of bridges, it is essential to secure an appropriate maintenance budget and allocate that budget appropriately. This paper proposes a reasonable budget allocation system that considers various impact factors to improve the conventional budget allocation method simply considering the bridge scale. The maintenance action rate model and the unit cost model based on the prior maintenance history were developed to allocate appropriately the bridge maintenance budget for the total bridges of the management organization with the target management level. A method to determine the optimal budget allocation ratio for each management subject was proposed and case analysis was conducted using the proposed model. Proper budget allocation was made considering the bridge types, current safety level, and service life as well as the bridge size as an impact factor of the budget allocation of the bridge. The developed method can prevent budget waste and provide a rational basis for budget allocation by implementing the rational budget distribution.