• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.10a
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• pp.170-172
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• 2002

해양의 수산자원개발을 위한 새로운 기술의 하나로 용승어장효과를 인공적으로 재현하여 어업생산성을 도모하기 위해 설치되는 인공용승구조물의 수리학적 특성을 검토하고 용승유량에 관한 기본적인 특성에 대해 연구하였다. 대상 인공용승구조물의 구조형식은 블록을 이용한 잠제 형식이며, 블록의 모양은 정육면체이다. 본 연구를 통해서 용승구조물의 용승유량 특성을 검토하고자 한다. (중략)

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 1997.10a
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• pp.302-307
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• 1997

철도는 평탄부, 고가부 및 성토부.절토부 등의 다양한 지형구조에 걸쳐서 뻗어 있으며, 지금까지는 평탄부와 고가부를 대상으로 하여 철도소음의 전파예측에 대한 검토를 해왔다. 본 연구에서는 유한 임피던스의 흡음성 Wedge 구조를 갖는 성토부 선로의 주행열차를 대상으로 소음전파 예측모델의 작성 및 소음전파 측정을 통하여 성토 선로구조에서의 철도소음 전파예측에 대하여 검토하였다.

• Journal of the Society of Naval Architects of Korea
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• v.30 no.4
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• pp.102-111
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• 1993

One of the most important design procedures for large sized structures is the evaluation of fracture strength against fatigue and brittle fractures threatening to occur in their steel members. In this paper, the safety assessment based upon the knowledge about the fracturing characteristics of such ship structures was discussed, which can be estimated from such phenomena as fatigue crack propagation and brittle fractures, as obtained by employing fracture mechanics at the basic design stage. Model tests with a partial structure specimen of full size was carried out to authenticate a question as to whether or not the fracturing characteristics of such sophisticated structures could be estimated with precision from ordinary scale specimen tests, It was shown that the behviour of fatigue crack growth of large sized structures in this study could be predicted from the results of ordinary scale specimen test.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.2A
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• pp.137-148
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• 2010

This study proposes the optimal ratio of vertical load-carrying capacity (${\beta}$) by investigating structural performances and economic efficiency in the extradosed bridges. Without design standards for the extradosed bridge, Japanese design standards have been used domestically. For the design live load, DL24 is found to be more adequate than DB24. Using the DL24 load, parameter studies are carried out. The parameters are 'main tower height', 'main girder stiffness', and 'cable arrangement'. As a result, it is found that one side cable-stayed extradosed bridges are more economical than double side cable-stayed extradosed bridges. This study also shows that when the ratio of vertical load-carrying capacity(${\beta}$) is 30~50% in the extradosed bridge with the ratio of tower height to main span length 1/6, the extradosed bridge is most economical because of the cable stress less than the allowable stress.

• Journal of Advanced Marine Engineering and Technology
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• v.37 no.1
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• pp.59-65
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• 2013

The objective of this paper is to analyze the structure of the wind power tree using a helical type wind turbine. The blades of a helical rotor is designed with a composite material. The structural analyses of a helical rotor have been implemented by finite element method. The structural analyses of the wind power tree which support four helical rotor, have been performed under a wind load, a rotational velocity of a rotor, and dead weight.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.318-321
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• 2010

강관구조물은 여러 이점으로 인해 다양한 분야에 적용되고 있으며, 관이음부의 구조강도를 증가시키기 위해 다양한 보강법이 적용되고 있다. 대형 관이음부 보강방법 중 내부 환보강재를 이용한 보강법이 사용되고 있다. 본 연구에서는 축방향력을 받는 K형 관이음부에 단일 및 이중 환보강재를 적용할 경우의 최대 응력 변화를 검토하였다. 내부 환보강재의 적용성 검토를 위해 유한요소 모델을 이용한 수치해석을 수행하였다. 각 지부재에 작용하는 하중과 내부 환보강재의 기하학적 형상에 따른 구조적 거동을 평가하였고, 수치해석 결과 환보강재의 보강효과가 정량적으로 산정되어 적용성이 검토되었다.

• Computational Structural Engineering
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• v.14 no.2
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• pp.5-10
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• 2001

• 건축구조
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• v.14 no.3
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• pp.44-47
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• 2007

• 건축구조
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• v.14 no.1
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• pp.39-45
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• 2007

• Journal of the Korean GEO-environmental Society
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• v.17 no.11
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• pp.55-64
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• 2016

Recently, it has been made many adjacent construction of inter-facility by the expansion of urban infrastructure facilities using the underground space. The complaints relating to the stability of the facility by adjacent construction is common. In this study, it was conducted for the subway line 5 Gimpo airport station structure in the upper Gimpo urban railway to determine the behavior characteristics of station structure according to adjacent construction. It was performed evaluation of the safety zone and excavation method for station structure. And after a review of damage evaluation, track irregularities and structural calculation by using a numerical analysis, stability of the station structure according to adjacent construction was evaluated to be secured. This study is expected to be used as basic data in advance if you need to review the effects of nearby structure according to adjacent construction.