• Computational Structural Engineering
• /
• v.6 no.3
• /
• pp.5-11
• /
• 1993

본문에서는 서해대교 사장교 설계의 경험을 기초로 사장교의 거동원리와 구조해석시 유의해야 할 몇가지 사항들에 대해서 기술하였다. 특히 강합성사장교의 주형해석시 바닥판과 강형의 모델링, 가설방법과 순서에 따른 명확한 이해와 이에 따른 구조계의 이상화, 시간경과에 따른 재료성질의 보다 엄밀한 구현 등이 설계에 미치는 영향과 중요성을 강조하였다. 사장교는 기존의 현수교에 비해 주형의 강성을 효율적으로 사용할 수 있고 미관이 탁월할 뿐 더러 주위환경에 따라 가설방법과 구조계를 변화시킬 수 있는 적응성이 뛰어나다. 이와 같은 측면 때문에 사장교는 현대 중.장대교량을 대표하는 형식으로 점차 그 영역을 넓혀가고 있다. 국내에서도 올림픽대교를 비롯한 몇개의 사장교가 건설되었으며 이와 같은 경험을 바탕으로 순수 국내기술에 의해 세계에서 10위권에 드는 장대사장교인 서해대교가 설계되기에 이르렀다. 이와 같은 경험의 조각들이 모여 국내 토목설계의 비약을 이룰 수 있는 전환점이 될 것임을 믿어 의심치 않는다.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2008.11a
• /
• pp.217-220
• /
• 2008

A modified FRP-concrete composite deck applicable to cable stayed bridge with long girder-to-girder span is proposed, and its design and economical efficiency are presented. The existing FRP-concrete composite deck has low section stiffness due to adoption of GFRP panel with low elastic modulus, which arrives at difficulty in meet of serviceability limit such as deck deflection. So a new-type FRP-concrete composite deck, named precast FRP-concrete deck, is developed by extensioning concrete at the both ends of FRP-concrete composite deck, which brings the effect of reduction of net span length of deck. Compared to the existing FRP-concrete composite deck this modified deck has the advantage of increasing span length but slightly increases self weight. For this type of deck the section optimization is carried out for the cases of simply supported on girder and composite to girder. The optimized deck was applied to cable stayed bridge with a center span length of 540m, and as a result it is verified that PFC deck can be applied efficiently to cable stayed bridge due to reduction of quantity of upper structure.

• Journal of the Korea Concrete Institute
• /
• v.24 no.4
• /
• pp.453-463
• /
• 2012

Steel-concrete composite rigid-frame bridge is a type of integral bridge having advantages in bridge maintenance and structural efficiency from eliminating expansion joints and bridge supports, the main problems in bridge maintenance. The typical steel-concrete composite rigid-frame bridge has the girder-abutment connection where a part of its steel girder is embedded in abutment for integrity. However, the detail of typical girder-abutment connection is complex and increases the construction cost, especially when a part of steel girder is embedded. Recently, a new type of bridge was proposed to compensate for the disadvantages of complex details and cost increase. The compensation are expected to improve efficiency of construction by simplifying the construction detail of the girder-abutment connection. In this study, a static load test has been carried out to examine the behavior of the girder-abutment connection using real-scale specimens. The results of the test showed that the girder-abutment connection of proposed girder bridge has sufficient flexural capacity and rebars to control concrete crack should be placed on the top of abutment.

• Journal of Korean Society of Steel Construction
• /
• v.16 no.6 s.73
• /
• pp.807-818
• /
• 2004

Experimental tests and theoretical methods of the analysis of the concrete shrinkage behaviors of steel-concrete composite girders are described herein. Steel-concrete composite test specimens were fabricated in the laboratory, and long-term behaviors such as deflections, curvatures, and strains were measured for one year. Test results were compared to the analytical results obtained by using the age-adjusted effective modulus method (AEMM). In addition, composite girders have been analyzed to investigate the effects of several parameters on the concrete shrinkage behaviors. From the long-term test results, it could be used to validate AEMM for the evaluation of the shrinkage behavior of composite girders. Because the shrinkage of the reinforced concrete slab in composite girders may lead to large tensile stresses in the concrete section, the transverse cracking of the slab could occur both in the positive and negative regions. Therefore, if the cracking of concrete would be ignored,it might lead to an overestimation of the stresses of the steel section of composite girders. Based on this research, it is proposed that the effect of transverse concrete cracking on the shrinkage behavior of steel-concrete composite bridges be considered.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.25 no.1
• /
• pp.73-79
• /
• 2011

• Disaster Prevention Review
• /
• v.20 no.3
• /
• pp.89-105
• /
• 2018

• Water for future
• /
• v.43 no.11
• /
• pp.44-49
• /
• 2010

• Journal of the Korean Ceramic Society
• /
• v.32 no.8
• /
• pp.922-930
• /
• 1995

• Disaster Prevention Review
• /
• v.20 no.4
• /
• pp.59-81
• /
• 2018

• Disaster Prevention Review
• /
• v.20 no.2
• /
• pp.57-72
• /
• 2018