• Smart Structures and Systems
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• v.32 no.5
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• pp.339-347
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• 2023

Both the first author and the company of the second author were involved, directly or indirectly, in the design stage of a permanent link between the bottom of the Italian peninsula and the nearby Sicily island. This ambitious project was left in stand-by from 2013 to 2023. The current political revival originates some thoughts on the updated desired performance of suspension bridges, without any immediate reference to that specific crossing. It is simply regarded as a starting point. After an update on recent worldwide realizations, the authors focus their attention on four basic aspects: the span length, the girder scheme, the foundation technology and the bridge runability. Eventually, structural control and monitoring aspects are discussed as potentially innovative options in designing suspension bridges with railway crossing.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.42 no.6
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• pp.879-885
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• 2022

Of increasing global popularity is the multi-dimensional use and development of cities to address land use and urban issues caused by high urban density and challenging topography. In Korea, the city of Busan has a large proportion of mountainous areas, and the Gyeongbu Line that runs through the city's center has been interrupting this urban area for over 117 years. Because a lack of usable land is hindering the development of the city, introducing a multi-dimensional approach to urban development is seen as important. Accordingly, the Gyeongbu Line underground project is attempting to solve the problem of disconnection of Busan's city center and increase the amount of usable land for varied multi-dimensional use. In this study, by conducting a preference survey among those who live near the underground project sites of the Gyeongbu Line stations in Busan, the planned use of each available land arearesulting from the multi-dimensional development of railroadsand railway stations was investigated. However, in order to further the results of the survey, legal and institutional support is needed. There are limits to the multi-dimensional use of land, such as the lack of interconnection between individual laws and the lack of specific guidelines for multi-dimensional development.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.36 no.6
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• pp.1145-1152
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• 2016

A construction post evaluation is introduced to provide information that can be used for similar construction projects in the future through the evaluation of the efficiency of a public construction project and the verification of the appropriateness of the project results. However, it is not widely used due to a lack of awareness of the method. For this reason, the aim of this study is to provide a basic frame that can be utilized as a reference for a similar project in the future based on the construction post evaluation. More specifically, a more effective analysis method for the construction post evaluation is proposed and then an exemplary analysis is performed based on the method. The paper analyzes 293 cases stored in construction CALS. Construction cost growth rates of railway projects are tend to be greater than other project types like highway, expressway, and harbour. Then, construction schedule grwoth rates of expressway are greater than others. This is expected to provide useful information for a future project, and serve as a basic frame. Moreover, it is also meaningful that a project can be analyzed from different perspectives through the construction post evaluation.

• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.1220-1222
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• 2002

The railway signaling system consists of several vital computerized equipments. Now the project for development of signaling system for the next-generation high-speed train is progressed according to the consortium. The developing signaling system by this project, kTCS(Korean Train Control System), is composed of kTCS-CTC, kTCS-IXL, kTCS-ATC and etc. The KTCS signaling has to be operated as a integrated system by interface between each signaling. To achieve these, communication protocols between each signaling have to be designed and message codes are defined. In this paper the configuration of integrated kTCS system and designed communication protocol is presented.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.3220-3225
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• 2011

Current IT Tools for construction project have been developing to satisfy the requirements of improving productivity and quality. Especially, the critical technology of the construction IT tools is the BIM (Building Information Modeling) which integrates and controls the construction information by modeling the structures in the virtual environment. Many domestic studies have been performed for developing various BIM tools and these have been demonstrated through a successful case study. However, because of the most studies focused on architecture and major construction firms, small construction firms are very difficult to utilize a BIM tool without a verification of it. To resolve these problems, this study suggests performance indicators to quantitatively assess the utilization of 4D CAD which is one of the representative BIM tools by BSC (Balanced Score Card). This performance indicator will be used as a measurement for applying IT tools in Construction Project.

• Proceedings of the KSR Conference
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• 2004.06a
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• pp.1118-1123
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• 2004

Launched in 1999 and funded by the Korean government, the R&D project of developing the. light train system technology is finally wrapped up to produce its prototype train prototype and all the research activities on signal, communication, power supply third rail Type and infra-structure have been completed. In an attempt to verify the usability of the system through an actual testing and as a preliminary step to the application of the system to overall light train construction projects to be implemented in different cities in Korea, testing lines are under construction now. Here we'd like to introduce people to the general overview of the test line construction and interface found in the process of project.

• Proceedings of the KSR Conference
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• 2000.11a
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• pp.543-556
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• 2000

A study on Technical Specifications of the current collection system in G7 Korean High Speed Train Project is performed in this paper. First, an appropriate level of contact wire tension for 350km/h commercial operation is proposed based on the foreign high speed train operation experiences and a relevant technical criterion, Second, two optimized design specifications of the pantograph for G7 Korean High Speed Train are proposed based on current collection quality. In order to perform design optimization, a formulation on the follow-up characteristics of a pantograph with 3 levels of masse-spring-damper is derived in this paper. Dynamic design parameters of the pantograph are adjusted to maximize follow-up capability at the dropper and span passing frequencies.

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.54-61
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• 2001

The purpose of this study is establishing effective multimodal logistics structure in northeast Asia. For this end, the interface between transport modes, construction method of rail-ferry transport system, system operation and implementation strategies by step were studied. Rail-ferry system have a competition over present transportation system in international cargo trade market between Korea and China. And, the operation of rail-ferry transportation system between Korea and China is meaningful project in the point of providing various choices to clients. Korea and China should have agreements in trade, customs duties, ports in the next year for the success of this project.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.1789-1795
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• 2007

Railroad, the structure maintenance and restoration project was increased and widely performed in concrete pavement road and airport, building at downtown area, bridge abutment, and other concrete structures. Especially, the ground reinforcement technique by quick-reaction expansible resins is the most effective countermeasures against differential settlement and undesired deformation of structure. In this paper, the unconfined compressive strength and some environmental related tests were conducted to evaluate compressive strength and environmental effect of quick-reaction expansive resins and soil mixtures. Also, three case histories of concrete structure and railroad restoration project are presented. Based on the laboratory test, the quick-reaction expansible resins and soil mixture represent the sufficient compressive strength and the leachate material is satisfied the environmental regulation limits. As a result of this study, the structure restoration technology using quick-reaction expansible resins is very effective for restoration of differential settlement and deformation, and it is environmentally sustainable technology.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.344-351
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• 2010

On last year's KSR conference, the general of systems engineering technology was introduced on the focus that the SEMP(Systems Engineering Management Plan) being applied for a national project of 'Urban Maglev Program'. Since this SEMP covers very wide work scopes of 'plan, application, control of the program', 'design, analysis, test & evaluation of the system', and 'special engineering activities', it is very important that the tasks and responsibilities of all participants of the project, involving the tasks to collaborate between them, are clearly defined and described. By the point, the updating of SEMP should be done continuously. In this paper, the updating points and typically the management plan of TPM (Technical Performance Measurement), which is more concretely defined, will be explained.