• Convergence Security Journal
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• v.11 no.5
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• pp.109-120
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• 2011

How meteorological situations have affected human life for survival have been an important element of living or military strategy throughout history. In modern society, overcrowding of cities has brought about many problems. Moreover, high-rise buildings and land cover have been causing abnormal weather conditions. The wind corridor, especially in urban areas has been flowing differently from the dominant weather condition of the surroundings. Therefore, the wind corridor in urban areas can be a main component in protecting major national facilities in urban areas from damage. Especially the wind corridor is a main factor to derive harm from poisonous substances in air. This paper seeks to find out the wind corridor in urban areas and the efficiency of that. In addition to that, it studies how to use the direction to protect major national facilities and areas from damage. It is considered that this study will be useful to make defence project, not only for preventing CBR(chemical, biological, and radiological) terrorism and violent assembly, but also for evacuation of people in case of big accidents or natural disasters.

• Journal of the Korea Institute of Building Construction
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• v.14 no.5
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• pp.487-495
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• 2014

Shortening the construction duration of structural frame work is extremely important because the work accounts for a major percentage of all cost and duration in large projects. For this reason, new construction methods to reduce the duration of structural frame work are being continuously studied and developed. A PSRC composite column, which uses steel angles instead of H-beams, has the advantages of flexural strength and ductility. Moreover, with this PSRC technique, conventional work for reinforcing bars in columns in practice can be skipped. However, one limitation exists in which the form work is still required. This research proposes a Form-LPSRC column method that is prefabricated with the column frame that includes permanent forms attached. Feasibility was examined with mock-up specimens and finally, the technique applied to real practice. Compared to the conventional SRC column method, this study demonstrated that the proposed technique has many advantages in construction duration, cost, quality, safety and environment.

• Korean Journal of Construction Engineering and Management
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• v.1 no.1 s.1
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• pp.63-71
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• 2000

The paper considers two non-deterministic methods of analysing the risk exposure in a cost estimate The fist method(referred to as the 'conventional statistical' method) analyses cost data directly, to describe a probability distribution for total cost. The second method(referred to as the 'Monte Carlo simulation' method) interprets cost data directly, to generate a probability distribution for total costs from the descriptions of elemental cost distribution. The common practice of allowing for risk through an all-embracing contingency sum or percentage addition is challenged. Rather than excluding conventional, non-deterministic methods, they are here presented as possibly the only of effective foundation on which to risk management in cost estimating.

• Korean Journal of Construction Engineering and Management
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• v.12 no.2
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• pp.12-20
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• 2011

Recently, construction site scale has been growing larger along with the growth of national economy. As construction market requires time reduction, cost saving, and improving quality, a cutting-edge technology applied research has been gradually studied for more efficient project management. In particular, the Real Time Location System (RTLS) technology, a real-time location tracking system of construction resources, can be effectively used in safety management. This technology has been studied and applied in various industries including architectural, marine, urban, and other industries. However, although tunnel construction in civil engineering has a narrow space and many safety risks, there are not researched about this content. Therefore, this study proposes an advanced safety management model for tunnel construction using the RTLS technology and a measurement method of the feasibility of this model in the construction site.

• Korean Journal of Construction Engineering and Management
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• v.10 no.6
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• pp.48-57
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• 2009

As recent construction projects have gradually become larger in size and complex, construction documents such as drawings and specifications revealed the limitations that can not express all the necessary information. Due to the lack of stipulations on the contract, disputes arise among contracting parties. Traditionally, many construction companies in Korea make an unfair agreement with the clients so that the irrational items are included in their contract documents. Potential dispute factors are triggered as a result of misleading or omitted items on the written documents. This paper analyzed the civic counseling cases obtained from the public procurement service in Korea, and identified the potential dispute factors that can occur during pre-dispute stage alone with their influence analysis. The results found from this study can be used for the development of checklists that prevent the dispute in the process of construction projects.

• Korean Journal of Construction Engineering and Management
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• v.15 no.2
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• pp.95-103
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• 2014

From $1960^{th}$ Korean construction industry has been rapidly grown due to Meddle-East construction market growth. To earn foreign currency and to raise overall Korean industry government has encouraged construction frontiers. As construction industry could grow up for its labour based originity but the time passes by and overseas construction market requests engineering know-how and technology for productivity to earn more profit. Over last 20 years overseas construction market share has been dramatically raised but its profit share is gradually declining. This study analyzed data sets of over 180 overseas construction projects for last 30 years of domestic contractor by using multiple-regression analysis and derived an output how input variables of characters explaining the construction project effects its profit.

• Korean Journal of Construction Engineering and Management
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• v.15 no.4
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• pp.49-57
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• 2014

Since the structure systems of construction projects have been forced to be large, high-rised, and complex, many researchers have been put their efforts to develop high strength concrete incorporating diverse advanced materials. In order to improve the performance of the concrete, the fibers leading high ductility to concrete have been used, consequently concrete columns adopting High-Performance Fiber Cement(HPFC) have been developed. This paper analyzed not only the construction work process of HPFC column installed to the real construction project, but also construction productivity of the columns by using discrete event simulation technique. As a result, several considerations on installing such a column have identified, compared with the works for typical concrete columns. In particular, there was specific characteristic to install the columns in terms of labor resource productivity, which is not shown with the work for the typical concrete columns.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.909-914
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• 2007

Today's dynamic nature of the construction environment requires management systems to be active enough to take real-time decisions. For real-time decision making, effective 3D spatial information acquisition is imperative. Various 3D data acquisition technologies are being developed and tested for 3D spatial information acquisition and its use for wide range of areas in the construction industry, however, there are shortcomings in these technologies. The major problems are long processing time and high cost which make current technologies impossible to be used for real-time applications. Laser-based Flash LADAR that illuminates the entire scene with diffuse laser light is comparatively fast and cost effective, therefore it is well suited for 3D spatial modeling of dynamic environment on a construction site. This paper presents experimental results to evaluate the performance of flash LADAR and discuss issues of applicability of Flash LADAR to 3D spatial modeling on a construction site.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.553-557
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• 2007

In general, material cost of a construction project is more than 30$^{\sim}$40% of total construction cost, thus on site material control is very important. The factthat buildings have recently become higher and bigger also increases the importance of on site material control. However, on site material control has not been considered as an important management issue. This study classifies building construction materials considering the material delivery characteristics such as ETO, ATO, MTO and MTS and the unique characteristics of each materials. Using the classification, this study examine the requirements for on site material control of each materials. Finally, this study suggests on site material control systems for each construction material.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.880-885
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• 2007

In the last decades, the resource used in the construction process has become much more various in kinds and increased in number as construction has become enlargement and complexity. Resource management on a construction site has been recognized as a detrimental factor to influence project success, therefore various technologies have been applied by the construction industry to streamline resource management. RFID/USN interworking system composed of RFID technology and sensor network supports automation of resource management and real-time information networking. Most of research efforts for RFID technology in the construction industry have been limited to object identification technology. The study proposed herein it to verify the applicability of RFID/USN interworking system to the construction industry. The identification rates of RFID/USN interworking system by distance and degree and by type of materials was identified and analyzed.