• Journal of architectural history
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• v.21 no.6
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• pp.35-44
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• 2012

This paper aimed at investigating into the origin and meaning of the Japanese architect Terunobu Fujimori's 'piercing column', and drew a conclusion as follows. First, the piercing column that made its first appearance in his architect debut work Jinchokan Moriya Historical Museum (1991) was conceived unexpectedly from pencil lines on a sketch that went through over the building's roof. And the tree-like natural treatment of the column's surface was influenced by Takamasa Yoshizaka's description of a Mongolian mud-house. Second, most of piercing columns in his later works have nothing to do with a structural role as in Jinchokan, but were designed for a visual effect and as a symbolic gesture. Again, they allude to a tree in nature through a roughly peeling treatment of the surface. Third, considering his ideas in History of Humankind and Architecture (2005), his column could be related to a universal origin of architecture and a symbol of the sun-god faith, and in particular to independent columns of Japanese Shito shrines, such as 'Onbashira' in Suwa and 'Iwanebashira' in Izumo. That is to say, the Fujimori column is a medium that implies the animistic nature-faith of Japan. Nevertheless, Fujimori's naturalism hints at a disquieting quality through an intentional artificiality and a provocative conflict between structure and finish of a building, which might be one aspect of the modern condition, 'uncanny'.

• International Journal of Naval Architecture and Ocean Engineering
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• v.4 no.3
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• pp.281-290
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• 2012

Hydrodynamic analysis of a surface-piercing body with an open chamber was performed with incident regular waves and forced-heaving body motions. The floating body was simulated in the time domain using a 2D fully nonlinear numerical wave tank (NWT) technique based on potential theory. This paper focuses on the hydrodynamic behavior of the free surfaces inside the chamber for various input conditions, including a two-input system: both incident wave profiles and forced body velocities were implemented in order to calculate the maximum surface elevations for the respective inputs and evaluate their interactions. An appropriate equivalent linear or quadratic viscous damping coefficient, which was selected from experimental data, was employed on the free surface boundary inside the chamber to account for the viscous energy loss on the system. Then a comprehensive parametric study was performed to investigate the nonlinear behavior of the wave-body interaction.

• Journal of the Korean Institute of Gas
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• v.23 no.3
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• pp.46-50
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• 2019

In this study, the strength stability of an LPG mini tank with a storage capacity of about 250 kg was analyzed by FEM. According to the results of the FEM analysis, it is preferable that the corner radius of the LPG mini tank having a storage capacity of 250 kg is designed to be 175 to 205 mm. Generally, the larger the corner radius of the end plate of the gas storage tank, the higher the safety of the strength, but the volume or capacity of the tank is reduced. Therefore, it is important to derive the optimum design data. Further, in order to securely design the strength of the gas tank, the thickness of the tank is designed to be thick. However, when the thick steel sheet is used, the material and the transportation costs are increased. The result shows that it is preferable to select the optimum thickness of the steel sheet from 4.5 to 5.5 mm. Using the level gauge type of column on the central axis of the gas tank, the safety strength of the LPG tank can be enhanced as much as twice, compared with the tank of the existing level gauge to measure the liquid level by piercing the side wall of the tank.

• Journal of Korean Society of Steel Construction
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• v.21 no.6
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• pp.575-583
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• 2009

As the height of buildings rises, new structural systems are being applied other than theexisting S, RC, and SRC to decrease the weight of buildings and to make their construction more efficient, CFT structureshad been applied in many building construction projects due to their superior structural performance and construction efficiency. CFT structures need a diaphragm to harmoniously transmit the beam flange load to the column and the opponent beam in connections. Especially, on the right and left sides of the column other beams are connected, The establishment of a diaphragm for the lower part flange load delivery of the beam and guarantee for concrete filing capacity difficulty have (What does this mean?). In this paper, connection details are proposed in the form of a welded vertical plate with a circular hole on the CFT column's interior to harmoniously transmit the lower-part beam flange load to the column and the opponent beam. Thesediaphragm details use the concrete anchor effect in the beam flange load delivery, with the concrete-filled CFT column interior piercing the hole of the perforated plate, and a perforated board is established vertically to improve the concrete filling capacity. To analyze the structural performance of the proposed connection details, five simple tension specimens were made with the following parameters: with our without vertical and horizontal perforated plates, shear hole number, concrete filled or not, thickness of the perforated plate, etc. Then experimental tests were performed on these specimens.