• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.339-340
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• 2023

Steel construction is one of the commonly used methods in building construction due to its efficiency in terms of time and cost. In particular, the top-down method using steel frames is widely used in the construction of underground structures in urban areas to shorten the construction period. However, there is currently no standardized cost estimation for subway steel frame construction in Korea, causing difficulties in determining the expected cost. In this study, we aim to provide basic data for establishing a cost estimation standard for subway steel frame construction through on-site surveys of subway steel frame construction commonly used in urban areas.

• Korean Journal of Construction Engineering and Management
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• v.24 no.4
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• pp.25-34
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• 2023

The purpose of this study is to calculate and compare construction costs for On-Site Construction and Off-Site Construction in Plant Project. For this purpose, the target for calculating the construction cost was limited to the Pipe Rack(Steel Structure and Piping). The results derived according to the purpose of the study are as follows. 1)The direct construction cost for On-Site Pipe Rack construction was KRW 56 billion, with Steel Structure KRW 25.1 billion and Piping KRW 30.8 billion won. 2)Comparing the rate of change between On-Site Construction and Off-Site Construction, material costs increased by 1.9% and expenses by 192.1%, but labor costs decreased by -9.1%, resulting in a total direct construction cost increase of 8.4%. These results can be used as reference data to check the current status of the increase or decrease in construction costs when constructing Pipe Racks as Off-Site Construction.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2007.04a
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• pp.93-96
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• 2007

Steel structure construction is the construction method which is plentifully used with reason of air shortening or the earthquake-proof efficiency improvement back. It is caused by with the feature which is a shop fabrication, it is more accurate than ferroconcrete construction when is a possibility of doing a materials supply and a crane work. From the research which it sees The instance analysis which uses the RFID it leads, A study is proposed an improvement plan of the RFID technology and an application plan of GPS.

• Journal of the Korea Safety Management & Science
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• v.15 no.3
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• pp.29-35
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• 2013

The research is to verify by experiments whether the steel truss structure is able to withstand the load of cement bricks of upper part of a door for the safe use of lightweight steel truss structure instead of concrete lintel which is to be installed at upper part of door frame in building cement bricks for apartment construction. The steel truss is designed in order not to disturb bricks-building and the shape of structure was verified by bending test. According to experiments result, camber was applied to steel structure that enabled construction work to be improved and was proved effective for the prevention of accidents by cement bricks-building load test.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2009.11a
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• pp.3-7
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• 2009

Construction projects are being the skyscraper and the large size by limited site condition and developing construction technology. Therefore, Steel structure work is steadily increasing caused by easy to work and structural safety. However, steel-frame work has the large incidence of heavy accident potentially. Recently a research group has recently developed newly designed self-supported steel joint for enhancing safety of steel erection work. Before applying the steel joint in a construction site, economic evaluation should be performed. Thus, we proposed the method for measuring economic efficiency of the new steel joint and verified economic feasibility of the steel joint method through a case study. As a result, Steel erection method using by self-supported steel joint showed economic rather than the one using by H-beams.

• Journal of Korean Society of Steel Construction
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• v.14 no.5 s.60
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• pp.675-682
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• 2002

The beam of composite structure composed of the RC structure in the end part and steel structure in the central palt were investigated during cyclic loading, in order to evaluate strength, stiffness, and deformational capacity. The parameters used in this study include the amount of reinforced steel bar between the steel beam and RC structure and the existence of the sticking plate. Test results showed that all specimens had stabilized hysteresis loops. Likewise, the specimens with sticking plate had higher load-carrying capacity compared with the one without it. In addition, the stiffness of the composite structure was higher than the steel structure. All specimens also showed good rotational capacity.

• Steel and Composite Structures
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• v.32 no.3
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• pp.347-359
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• 2019

Modular construction has been increasingly used for mid-to-high rise buildings attributable to the high construction speed, improved quality and low environmental pollution. The individual and repetitive room-sized module unit is usually fully finished in the factory and installed on-site to constitute an integrated construction. However, there is a lack of design guidance on modular structures. This paper mainly focuses on the evaluation of the initial stiffness of corrugated steel plate shears walls (CSPSWs) in container-like modular construction. A finite element model was firstly developed and verified against the existing cyclic tests. The theoretical formulas predicting the initial stiffness of CSPSWs were then derived. The accuracy of the theoretical formulas was verified by the related numerical and test results. Furthermore, parametric analysis was conducted and the influence of the geometrical parameters on the initial stiffness of CSPSWs was discussed and evaluated in detail. The present study provides practical design formulas and recommendations for CSPSWs in modular construction, which are useful to broaden the application of modular construction in high-rise buildings and seismic area.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2003.05a
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• pp.121-126
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• 2003

Steel frame construction is divided into subsidiary materials with column, beam, girder and bracing. After these are processed in factory for using installing in construction field. These prefabricated furniture is very important in accordance with design drawing about processing and prefabricating. In the case of design process using information transmission in blueprint, omission of material number, processing measure and finishing material, or discordance of each structure drawing and selecting incongruent structural material generated an error in the process of design. These error caused delaying tine and increasing cost and increasing safety accident in the steel-structure work operating process. therefore, design process should consider problem of operating process.

• Journal of the Korea Institute of Building Construction
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• v.3 no.2
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• pp.111-118
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• 2003

Steel frame construction is divided into subsidiary materials with column, beam, girder and bracing. After these are processed in factory for using installing in construction field. These prefabricated furniture is very important in accordance with design drawing about processing and prefabricating. In the case of design process using information transmission in blueprint, omission of material number, processing measure and finishing material, or discordance of each structure drawing and selecting incongruent structural material generated an error in the process of design. These error caused delaying time and increasing cost and increasing safety accident in the steel-structure work operating process. therefore, design process should consider problem of operating process.

• Proceedings of the KWS Conference
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• 2002.10a
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• pp.349-354
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• 2002

Stud penetrate welding is an important item of composite floor in modern steel structure, especially in high-rise buildings. But it is difficult to get satisfied welding quality due to all kinds of factors. In this paper, the author put forward a new welding procedure named method of energy control through analysis and comparison of the wave curves of stud welding based on large amount of experiments and tests in laboratory and construction areas. The use of this welding procedure in some large engineering in recent years proved that this method is effective and practicable