• Journal of the Korea Convergence Society
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• v.11 no.10
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• pp.71-79
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• 2020

Due to the recent changes in residential value, user needs for various spaces in residential space are increasing. However, it is not easy to change and reconstruct the first residential form according to the needs of the user due to the characteristics of the residential space where movement and deformation are difficult. Therefore, this study aims to derive a plan to meet user needs according to changing residential value by using fully autonomous vehicles with a concept of space that can be moved. First, the existing residential space was classified through literature research, and based on this, the space type of the fully autonomous vehicle for the residential was derived through user research. Then, through the survey method and statistical analysis, user needs analysis for residential space, usefulness analysis of derived space type and type specification were carried out. Finally, based on the results of the study, the design direction of the fully autonomous vehicle for residential purpose was presented. Based on the user's perception, it is meaningful that it categorizes the space of the fully autonomous vehicle for residential purposes and suggests the design direction.

• Journal of Korean Society of Steel Construction
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• v.18 no.5
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• pp.525-534
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• 2006

Column-to-beam pinned connections can cause local moment to the web of a steel tube due to the distance of eccentricity between the row of bolts and the column flange, which possibility deteriorates the load capacity of column. In this study, a square hollow section tubular used finite element analysis of a square hollow section tubular column was carried out, and the column width and thickness, existence and non-existence of internal reinforcement, and existence and non-existence of compressive force were taken as variables to examine the load capacity deterioration of a square column caused by moment. To guarantee the reliability of the finite element results, some specimens were fabricated and tested. The yield line method was applied to suggest the strength formulas of the square tubular column to the beam pinned connections. Based on the study results, the column strength the moment of the square hollow section tubular column to the beam pined connections improved with the increase in the w to strength limitations, a no-reinforcement type of square hollow section tubular column was proposed, and if the limitation values were not satisfied, the reinforcement of the internal column was made mandatory. Therefore, the horizontal -reinforcement type considered the strength increase, and the fabrication of the square hollow section tubular column was ar column that considered its load capacity with the moment for the no-reinforcement and the horizontal-reinforcement types.

• Journal of Korean Tunnelling and Underground Space Association
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• v.14 no.6
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• pp.653-666
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• 2012

This study made progress about Demage Mechanism of Transition Section in Cut and Cover Tunnel. For this study, Inspection and test was carried out about Transition Section. After this process, Numerical Analysis was accomplished by 2D, 3D. A result of inspection and test, It couldn't find the reason why the upper slab Demage was detected. So 2D Numerical Analysis was conducted. It was analyzed that the Safety Factor(1.0) was satisfied in 2D. But, the result of 3D Numerical Analysis, The reason was found that the Demage on upper slab was caused by moment change. The Moment was changed by column interval transition. For Retrofitting, Column was added under slab in tunnel. It was found that the addition column decreased upper slab deformation. After this study, It could be find that are important 3D Numerical Analysis as well as 2D Numerical Analysis in case of Transition Section. This Study can help developing construction and maintenance about Tunnel. Finally, It's going to study Retrofitting plans which have minimum influence of Transition Section in Cut and Cover Tunnel.