• Computational Structural Engineering
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• v.4 no.2
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• pp.24-31
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• 1991

국내의 경우 1988년에 건축물에 대한 내진설계기준이 제정되어 대형건축물에 대한 내진설계가 의무화되고 있으나, 도로교에 대해서는 아직 체계적인 연구나 설계방법이 도입되지 않고 있는 실정이다. 그러나 최근 국내에 건설된 올림픽대교, 팔당대교, 강동대교와 과거에 건설된 남해대교, 돌산교 등에서 미국이나 일본의 설계기준을 참조하여 내진해석을 실시한 바 있고, 앞으로 건설될 대형고량에 내진설계가 보편화될 것이 예상되는 바, 지진의 다발지역인 미국 캘리포니아주의 내진설계법과 지진의 피해가 다소 경미한 지역을 대상으로 한 미국의 도로교시방서(AAS HTO제정)의 내진설계법을 소개하고자 한다.

• 공원문화
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• s.1
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• pp.33-40
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• 1975

• Magazine of the Korea Concrete Institute
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• v.28 no.5
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• pp.56-61
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• 2016

• The Science & Technology
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• v.33 no.8 s.375
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• pp.18-20
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• 2000

스마트 구조기술이란 교량이나 건물 등 구조물에 생명체처럼 감지하고 말할 수 있는 센서를 삽입하거나 부착하여 과도한 하중이나 균열 등 이상상태를 검출, 대형사고를 예방하는 기술이다. 우리나라에서는 남해대교에 광섬유 센서를 적용하여 차량이동에 따른 교량의 동적 변형률을 이미 측정하고 있으며 지반병형을 방지하기 위한 강철파일에 광섬유 센서를 부착하여 지반변형을 모니터링하는 연구도 계속되고 있다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11b
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• pp.988-993
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• 2002

The AVT under traffic-induced vibrations was carried out on Namhae suspension bridge in Korea. Mode shapes as well as natural frequencies up to the 15th mode were acquired exactly, and the effect of traffic mass and temperature on measured natural frequencies was investigated. The results from the AVT are compared with those from forced vibration test(FVT) and FE analysis. In the case of long span suspension bridges such as Namhae bridge which has relatively large mass, the results shows that the measured natural frequencies are not affected by vehicle mass. From the results of long-term variation of natural frequencies due to temperature change, it can be said that temperature effect may be predominant to structural demage effect. Therefore, if damage detection methods based on dynamic characteristics of bridges are to be used, the variation should be taken into consideration.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.3 no.3
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• pp.27-37
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• 1983

A method of dynamic analysis is developed for torsional free vibrations of elliptical-box girder type or stiffening truss system suspension bridge. In this study, the method based on a finite element technique using a digital computer, is illustrated by two numerical examples, the Namhae Bridge which is located in Kyungsang nam-do opened on June, 1973, and the Mt. Chunma Bridge is simple span pedestrian's suspension bridge with lateral bracing system in Mt. Chunma, Kyungki-do, are used. In general, dynamic modes of complex suspension bridges are three-dimensional in form, i.e., coupling between vertical and torsional motions. However, introduced that amplitudes of oscillation are infinitesimal for coincidence with the purpose of it's use, thereupon, the torsional vibration analyses are treated without coupling terms. A sufficient number of natural frequencies and mode shapes for torsional free vibration are presented in this paper. In the case of Mt. Chunma Bridge, the natural frequencies and periods are computed with and without reinforcement, respectively, and compared their discrepancies. The influence of the auxiliary reinforcing cables is prevailing in the first few modes, namely, 1st and 2nd in symmetric and 1st, 2nd and 3rd in antisymmetric vibration, and conspicuous in the symmetric compared with the antisymmetric motion, but in the higher modes, this kind of simple accessory elucidates rether converse effects. In the Namhae Bridge, the results are compared with the Manual's obtained by wind tunnel test. It reveals commendable agreement.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11a
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• pp.396.1-396
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• 2002

The AVT under traffic-induced vibrations was carried out on Namhae Suspension bridge in Korea. Mode shapes as well as natural frequencies up to the 15th mode were acquired exactly, and the effect of traffic mass and temperature on measured natural frequencies was investigated. The results from the AVT are compared with those from forced vibration test(FVT) and FE analysis. (omitted)

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1996.10a
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• pp.84-88
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• 1996

본 연구에서는 전회의 남해도해역조석수치모형(최 등, 1995)을 확장하여 가막양이 포함되도록 조석수치모형을 수립하였다. 개체 식별 가능한 다수의 입자가 M$_2$ 조석 주기 동안 이동되도록 수치실험을 행하였고 여수해만 입구와 노량수도 및 창선해협과 대방수도를 경계로 교환량을 평가하고 광양만 및 진주만의 해수 교환률을 산정하였다. 95년 7월의 씨프린스호 사고에 이어 7월 17일 호남정유의 호남 사파이어호의 누출유 사고는 18일 밤부터 여수시 돌산대교를 거쳐 청정해역인 가막양으로까지 확산되었는바 본 고에서는 광양만 일대의 오염물질 확산거동을 수치적으로 연구하기 위한 초기단계의 과업을 수행하였다. (중략)

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.5A
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• pp.699-707
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• 2008

For most structural evaluation of bridge integrity, it is very important to measure the geometric profile, which is a major factor representing the global behavior of civil structures, especially bridges. In the past, because of the lack of appropriate methods to measure the deflection profile of bridges on site, the measurement of deflection has been restricted to just a few discrete points along the bridge, and the measuring points have been limited to the locations installed with displacement transducers. Thus, some methods for predicting the static deflection by using fiber optic strain sensors has been applied to simply supported bridges. In this study, a method of estimating the static deflection profile by using strains measured from suspension bridges was proposed. Based on the classical deflection theory of suspension bridges, an equation of deflection profile was derived and applied to obtain the actual deflection profile on Namhae suspension bridge. Field load tests were carried out to measure strains from FBG strain sensors attached inside the stiffening girder of the bridge. The predicted deflection profiles were compared with both precise surveying data and numerical analysis results. Thus, it is found that the equation of predicting the deflection profiles proposed in this study could be applicable to suspension bridges and the FBG strain sensors could be reliable on acquiring the strain data from bridges on site.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.313-316
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• 2003

This paper presents stand-alone electric power generator using bridge vibration for charging system of health monitoring sensor unit of bridge structure. In this paper, a novel electric power generator utilizing vertical vibration is proposed, which has minimum effect of armature reaction, and the related mechanical and electrical design equations are obtained and then a pilot electric power generator has been implemented. Moreover, the free oscillation test reveals that diode characteristics of rectifier is dominant factor in charging process. Also, simulation results with the Namhae bridge data showed the validity and effectiveness for stand-alone electric power generation.