• 한국공간구조학회논문집
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• 제20권4호
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• pp.63-71
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• 2020

The fluctuating wind pressure of the low rise ratio(f/D=0.1) for the elliptical dome roof was analyzed to compare it with the previous studies of circular dome roofs. Wind tunnel test were conducted on a total of 10 wind directions from 0° to 90° while changing wall height-span ratios(H/D=0.1-0.5). For this, meanCP, rmsCP and wind pressure spectrum were analyzed. The analysis result leads to find differences in the shape of the spectra in the spanwise direction and leeward of the elliptical dome according to the wind direction variations of the elliptical dome roof.

• 한국공간구조학회논문집
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• 제20권1호
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• pp.49-59
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• 2020

This study investigates the wind pressure characteristics of elliptical plan retractable dome roof. Wind tunnel experiments were performed on spherical dome roofs with varying wall height-span ratios (0.1~0.5) and opening ratios (0%, 10%, 30% and 50%), similar to previous studies of cirular dome roofs. In previous study, wind pressure coefficients for open dome roofs have been proposed since there are no wind load criteria for open roofs. However, in the case of Eeliptical plan retractable dome roof, the wind pressure coefficient may be largely different due to the presence of the longitudinal direction and transverse direction. The analysis results leads to the exceeding of maximum and minimum wind pressure coefficients KBC2016 code.

• 한국공간구조학회논문집
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• 제20권4호
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• pp.83-91
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• 2020

In this study, a tuned mass damper(TMD) was installed to control the displacement response to earthquakes by generalizing to six analysis models according to the shape of the upper structure based on the case of various large spatial structures around the world. The six analysis models are ribbed type, latticed type, elliptical type, gable type, barrel type, and stadium type composed of 3D arch trusses. In this paper, ribbed type, latticed type and elliptical type were analyzed. The mass of each TMD was set to 1% of the total structural mass. Result of analyzing the optimal number and position of the analysis model, the displacement response control was the most excellent in the model with 6 and 8 TMDs, and the displacement response decreased in most cases. The displacement response control was better with installing the TMD at the edge point than focusing the TMD at the center of the analysis model. However, when 10 or more TMDs are installed or concentrated in the center, large loads intensively act on the structure, resulting in increased displacement. Therefore, although it is slightly different depending on the shape, it is judged that the displacement response control is the best to install 6 and 8 TMDs at the close to the edge point.

• 한국공간구조학회논문집
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• 제20권4호
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• pp.73-81
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• 2020

In this study, a tuned mass damper(TMD) was installed to control the displacement response to earthquakes by generalizing to six analysis models according to the shape of the upper structure based on the case of various large spatial structures around the world. The six analysis models are ribbed type, latticed type, elliptical type, gable type, barrel type, and stadium type composed of 3D arch trusses. In this paper, ribbed type, latticed type and elliptical type were analyzed. The mass of each TMD was set to 1% of the total structural mass. Result of analyzing the optimal number and position of the analysis model, the displacement response control was the most excellent in the model with 6 and 8 TMDs, and the displacement response decreased in most cases. The displacement response control was better with installing the TMD at the edge point than focusing the TMD at the center of the analysis model. However, when 10 or more TMDs are installed or concentrated in the center, large loads intensively act on the structure, resulting in increased displacement. Therefore, although it is slightly different depending on the shape, it is judged that the displacement response control is the best to install 6 and 8 TMDs at the close to the edge point.

• 터널과지하공간
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• 제16권1호
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• pp.11-25
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• 2006

일본 기후현의 카미오카광산은, 채광후의 지하공간을 연구나 실험시설로서 재활용하고 있는 광산중의 하나이다. 동 광산의 지하 약 1,000 m의 대심도에, 우주에서 도래하는 소립자의 관측과 양자의 붕괴현상 등을 연구하기 위한 실험시설 SUPER-KAMIOKANDE(KAMIOKA Nucleon Detective Experiment)가 건설되었다. 이 시설을 수용하는 지하공간은 직경 40m, 높이 42.4 m의 원통부와 그 상부에 높이 15.2 m의 반 타원형 돔부로 구성되어 있으며, 총 굴착 량은 $69,000\;m^3$ 균이었다. 지하공동 단면의 크기는 대형지하발전소와 비슷한 규모이지만, 공동의 형상이 종래에 그 예를 찾아 볼 수 없는 원통형이라는 것, 지하 10 m의 대심도이기 때문에 커다란 초기지압이 존재한다는 것, 그리고 굴착방법으로서 높이 10 m의 장공발파를 이용한다는 특수조건 하에서 공동의 굴착을 안전하고 경제적으로 실시하기 위해 초기지압결과를 이용하여 계측단면을 설정하여, 암반거동에 관한 계측계획 을 입안하였고, 지중 변위 측정, 록볼트 축력측정, 응력변화 측정을 실시하면서 시공관리를 실시하였다.