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Busan, South Korea

Moon S.,Pusan National University | Ha C.,Busan Metropolitan City | Yang J.,Busan Metropolitan City
Journal of Construction Engineering and Management

Abstract Value engineering (VE) is an effort to increase the value of a system through a creative and organized approach. Idea generation is the most important part in a VE job plan. Although the experts in a VE team can evaluate multiple alternatives that can replace the original idea, idea generation is usually on the basis of their knowledge and experience. A structured method will help to consider different functional perspectives and to create inventive ideas that could have been missed otherwise. This paper presents a construction value engineering inventive idea support (CVE-IIS) tool for structured idea generation in construction VE. In this study, previous VE reports were analyzed to understand the pattern of proposed ideas in highway construction design. These ideas were categorized according to the rules of advanced systematic inventive thinking (ASIT) to establish an idea breakdown structure (IBS). The IBS was then used to support the generation of construction ideas using idea-generation worksheets. A case study demonstrated that the CVE-IIS can help improve the value of design functions by improving performance. © 2012 American Society of Civil Engineers. Source

Lee S.Y.,Busan Metropolitan City | Jung H.Y.,Pusan National University
17th ITS World Congress

The Semi-public Bus Transportation System and the Bus-Subway Transfer System included Community buses, recently implemented in Busan, provide a better service quality of public transportation for a citizen of Busan. However, these systems have brought out problems like decreases of service frequency, a spread of drivers' egotism and managers' carelessness, and so on. It has been happened diseconomy that service hasn't improved to be caused inconvenience of bus user as increasing headway. It has been occurred imbalance of demand and supply, because of a wide difference of headway's and bus user demand's fluctuation. Therefore, this study explores a way to control more flexible bus headway to provide reduction of operation costs to private bus companies and a better service quality of urban transportation system to citizens. For doing this study, we make use of BIMS(Bus Information Management System) data. Source

Jeon B.,Kyungsung University | Choi Y.,Kyungsung University | Kim C.,Kyungsung University | Song B.,Busan Metropolitan City
15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015: New Innovations and Sustainability

Sonar Roughness Profiling System (SRPS) that can be used in the construction site was developed and verification tests were conducted to evaluate the applicability of SRPS. Firstly, in the indoor test, objective was to study the ability of sonar sensors. It was tested to check the effect of different shapes and turbidity using five specimens. It was found that the sensors had an accuracy of 1 mm. Plus, it was not greatly affected by the change of the shapes and turbidity. Secondly, in order to confirm field application of SRPS, tests were carried out on site. Although some problems were found, test was completed properly according to test procedure. Based on the test results, it was confirmed that SRPS could be used to measure socket roughness on site where shaft were drilled in rock. Source

Nam M.S.,Research Institute of Korea Expressway Corporation | Kim H.-J.,Research Institute of Korea Expressway Corporation | Kwon S.-G.,Busan Metropolitan City
15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015: New Innovations and Sustainability

Earthquakes have occurred globally over the last two decades, which have resulted in an increased expectation of acceptable performance for bridge structures during seismic events. Many research projects have been performed to assess the degree of structural damage especially upper structure of bridges. However, a few researches are available on the pile foundation systems and their response to earthquakes especially for a pile to pile-cap connection. When a pile-cap is loaded, moment and axial loads are transferred to the pile through the pile to pile-cap connection. There is uncertainly with regards the portion of the loads the connection experiences due to the inability to effectively monitor the forces the connection experiences during loadings. In order to investigate behavior of the pile to pile-cap connection for steel pipe piles subject to axial and uplift loads, full scale tests were conducted, and their key factors were considered from test results. Source

Yang J.,Korea Institute of Construction Technology | Yang J.,Pusan National University | Baeg H.,Pusan National University | Moon S.,Busan Metropolitan City
KSCE Journal of Civil Engineering

The design review in a Value Engineering (VE) workshop generates ideas for alternative construction designs that, if adopted, would improve the function of the original design. Each alternative conceived during idea generation will usually carry some beneficial and some adverse effects that must be traded off against each other when deciding whether or not to adopt the design. The objective of this paper is to investigate the characteristics of contradiction in idea creation, and use them to create better design alternatives in construction VE. An Idea Breakdown Structure (IBS) is applied as the principle of problem solving. A contradiction table is then set up to overcome contradictions in construction design. A case study shows that balanced contradiction produces better alternatives in construction VE. © 2014 Korean Society of Civil Engineers and Springer-Verlag Berlin Heidelberg. Source

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