• Journal of Korean Association for Spatial Structures
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• v.8 no.6
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• pp.59-66
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• 2008

Seismic safety is more important for large spatial structure such as theaters, stadiums, gymnasiums since these structure are public goods. It is, however, difficult to understand behavior taking place when large spatial structure which has variety of structural system and shape receives seismic load. On this study, the natural vibration mode of arch structure which is main structural element of the large spatial structure, is checked. And then, when the artificial earthquake ground motion is applied to arch structure, it is more affective by long period component than magnitude of design acceleration spectrum.

• Journal of the Earthquake Engineering Society of Korea
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• v.8 no.5 s.39
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• pp.91-99
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• 2004

In general, stadium structure with long span has low inherent natural frequency. In the stadium structure, structural behavior similar to resonance can be occurred easily by spectator rhythmical movements of which exciting period is small comparatively. It is required to investigate the safety and the serviceability of stadium structure. Therefore, there exists a necessity for accurate vibration analysis. Accurate analysis of stadium structure subjected to dynamic load is required for economical construction and safe design of stadium structure. Stadium structure should be modeled by refined mesh for accurate vibration analysis. As the mesh of stadium structure is refined, the number of divided elements increases in numerical analysis. The number of node is increased and numerous computer memories or computational time are required. So it is very difficult to analyze refine model of stadium structures by using the commercial programs. It is possible to efficient vibration analysis of stadium structure by finite element modeling method using equivalent beam element proposed in this paper, because the number of nodes is decreased remarkably.

• Journal of The Geomorphological Association of Korea
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• v.18 no.3
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• pp.93-105
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• 2011

'This study aims to make a choice of 'the new ten beauty spots in Daegu city' based on the analysis of survey of 390 persons selected randomly. The main results are as follows. First, there is no distinctive regional character in making a choice of 'the new ten beauty spots in Daegu city'. Second, 'Gong-Ryeong-jeok-Seol(公嶺積雪) and Buk-Byeok-Hyang-Rim(北壁香林)' among 'Daegusibyeong(大丘十詠)' written by geo-jeong Seo in the Chosun(朝鮮) dynasty are included into 'The new ten beauty spots in Daegu city'. Third, The most picturesque place is Mt. Palgong in Daegu city. Fourth, most people estimate a historical nature as the most important factor in making a choice of 'The new ten beauty spots in Daegu city', but it has not been found such tendency in the selected places as 'The new ten beauty spots in Daegu city'. Fifth, both male and female have chosen Mt. Biseul, Duryu tower, Mt. Palgong and Daegu stadium as 'The new ten beauty spots in Daegu city'. Sixth, natives of Daegu as well as non-natives of Daegu tend to highly prefer Duryu tower, Mt. Biseul and Mt. Palgong.