• Journal of the Earthquake Engineering Society of Korea
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• v.8 no.2
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• pp.73-81
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• 2004

In this study, experimental research was carried out to improve earthquake-resistant performance for the retrofitting of reinforced concrete beam-column joints using carbon fiber materials in existing reinforced concrete building. Six reinforced concrete beam-column joints were constructed and tested to evaluate the retrofitting effect of test variables, such as the retrofitting materials and retrofitting region(plastic hinge, beam-column joint) under load reversals. Test results show that retrofitting specimen(RPC-CP2, RPC-CR, RJC-CP, RJC-CR), using new materials(carbon fiber plate, carbon fiber rod and carbon fiber sheet), designed by the improvement of earthquake-resistant performance and ductility, attained more load-carrying capacity and stable hysteretic behavior.

• The Journal of Engineering Geology
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• v.31 no.4
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• pp.719-730
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• 2021

An improved packer and injection system was developed to improve the efficiency of excavation by hydraulic rock splitting by reducing vibration and noise. Field testing of the system found hydraulic fractures limited in expansion and extension due to the loss of injection pressure by leackage from the cracks, and then the single packer applied to injection hole allowed to produce a sufficient tensile displacement for rock excavation. Numerical analysis based on the field test data could explain the development of cracks in the field experiments.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1998.10a
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• pp.365-368
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• 1998

• Environmental engineer
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• v.18 s.196
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• pp.52-57
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• 2002

통계적인 상관관계 분석이나, 과학적인 실험계획 등을 통하여 결과를 예측하고, 예측된 결과가 개선효과로 나타남으로써 시그마 추진에 대한 신뢰도가 향후 더욱 높아질 것으로 기대된다.

• The Science & Technology
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• v.24 no.7 s.266
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• pp.2-19
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• 1991

• The Science & Technology
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• v.27 no.9 s.304
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• pp.83-84
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• 1994

• 대한위암학회:학술대회논문집
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• 2001.11a
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• pp.49-49
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• 2001

• Journal of the korean Society of Automotive Engineers
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• v.16 no.3
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• pp.30-35
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• 1994

• Proceedings of the Korea Water Resources Association Conference
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• 2003.05b
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• pp.783-786
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• 2003

• Water for future
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• v.55 no.3
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• pp.78-87
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• 2022