• Journal of the Korean Wood Science and Technology
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• v.37 no.4
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• pp.300-309
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• 2009

The effective utilization of wood structure is encouraged to preserve natural resources and the global environment. Long-span and large-scale structures are preferred to promote demand for wood. This study attempts to develop new Fire-resistance Composite Material composed of Structural steel and Structural glued laminated timber for long-span and large-scale structures. Prior to take a fire-resistance test, compare properties of bending strength with Composite material composed of Structural steel and Structural glued laminated timber, structural steel and structural provides the stability of the structure, but the structural glued laminated timber has high value elasticity of bending. Using the Composite material will improve structural stability and Eco-friend construction environment.

• Journal of Korea Ship Safrty Technology Authority
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• s.26
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• pp.4-23
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• 2009

선체용 복합재료 및 구조용 접착제와 신공법인 진공 성형법으로 건조한 레저선박에 강화플라스틱 구조기준을 그대로 적용하기에는 무리가 있으며, 따라서 복합재료, 수지, 접착제 및 진공 성형법 등 현장조사를 토대로 복합소재 및 접착제를 이용한 시험편을 제작하여 복합재료의 기계적 특성, 구조용 접착제에 대한 신뢰성 평가 및 국내외 기준 비교 검토를 통한 국내 실정에 적합한 검사기준을 제안하고자 한다.

• Journal of the Korean Wood Science and Technology
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• v.28 no.3
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• pp.14-24
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• 2000

In present research, the plywoods made of radiata pine or Japanese larch, the potential softwood species in mass supply, were discussed to examine their feasibility as the structural and concrete form panels through the basic properties test. First, plywood qualities and its nail performance were tested. The performance test for concrete form or structural panel by concentrated and uniformly distributed load were conducted to investigate the possibility as structural material for light frame and concrete constructions. Test results of basic quality such as specific gravity, cupping, bowing, and twisting appeared to satisfy the criteria for structural use. Also, nail performance test results, for roof and wall sheathing panels, nail lateral resistance, nail withdrawal resistance, and nail push head resistance proved to meet the required standard for structural use. The test results on performance as structural panel by concentrated and uniformly distributed load and as concrete form panel showed that these two species could be used for structural sheathing, subfloor, and concrete form panels.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.11a
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• pp.443-446
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• 2009

In this study, a series of degradation test for structural adhesives was performed to investigate the possibility of replacement of the alternative adhesives to the conventional adhesives. Four types of the adhesives were exposed to combined environmental conditions over 1000 hours at an accelerated aging tester, which can simulate natural weather conditions such temperature, moisture and ultraviolet. Mechanical and chemical properties of the adhesives were evaluated through material testing system and FT/IR spectrometer. According to the results, the conventional adhesives can be replaced by the alternative adhesives because the alternative adhesives were more stable to environmental conditions rather than the conventional adhesives.

• Journal of the Korea Concrete Institute
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• v.23 no.4
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• pp.461-469
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• 2011

In this study, the effect of polyvinyl alcohol (PVA) fiber volume fraction on the pullout behavior of structural synthetic fiber in hybrid structural synthetic fiber and PVA fiber cement composites are presented. Pullout behavior of the hybrid fiber cement composites and structural synthetic fiber were determined by dog-bone bond tests. Test results found that the addition of PVA fiber can effectively enhance the structural synthetic fiber cement based composites pullout behavior, especially in fiber interface toughness. Pullout test results of the structural synthetic fiber showed the interface toughness between structural synthetic fiber and PVA fiber reinforced cement composites increases with the volume fraction of PVA fiber. The microstructural observation confirms the incorporation of PVA fiber can effectively enhance the interface toughness mechanism of structural synthetic fiber and PVA fiber reinforced cement composites.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.296-296
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• 2023

최근 기후변화로 인해 극한 강우의 발생빈도가 증가하고 있다. 극한 강우의 증가는 수리구조물의 설계홍수량을 초과하는 유입량을 발생시킴으로써 수리구조물의 구조적 안정성을 저해할 수 있다. 농업용 저수지가 기후변화로 인한 이상 강우의 증가에도 불구하고 안정적으로 운영되기 위해서는 적절한 홍수 방재체계의 수립이 필요하다. 저수지의 홍수 방재체계는 구조적 홍수 방재체계와 비구조적 홍수 방재체계로 구분되며, 구조적 홍수 방재체계는 비구조적 홍수 방재체계에 비해 많은 자본이 투입되어야 한다는 특징이 있다. 농업용 저수지의 홍수 방재체계 수립 시 구조적 방법과 비구조적 방법을 종합적으로 고려하여야 하며, 농업용 저수지에 관한 홍수 방재체계 마련 방안이 정립되어야 한다. 본 연구에서는 구조적 방법과 비구조적 방법을 모두 고려한 농업용 저수지의 홍수 방재체계를 마련하고, 이를 적용함으로써 기후변화에 대응하여 농업용 저수지의 홍수조절 능력이 적절히 마련되었는지를 확인하고자 한다. 본 연구에서는 수계, 저수량, 치수 사업 진행 여부 등의 요소를 고려하여 17개의 농업용 저수지를 연구대상지로 선정하였다. 저수지 운영 모의를 위하여 각 연구대상지의 기상자료, 지형자료, 저수지 제원 자료를 수집 및 분석하였다. 저수지 운영방법으로는 저수위가 목표수위 이상일 경우 유입량 전량을 방류하는 Auto-ROM 방식을 채택하였다. 기후변화가 농업용 저수지의 홍수조절능력에 미치는 영향을 파악하기 위해 SSP (Shared Socio-economic Pathways) 기후변화 시나리오를 활용하였다.

• 건축구조
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• v.11 no.3
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• pp.36-38
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• 2004

• Journal of the Computational Structural Engineering Institute of Korea
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• v.25 no.5
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• pp.421-432
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• 2012

This paper is the first paper among two papers which constitute the paper about the structural design of a dental implant. This paper surveyed types and characteristics of dental implants. Merits and shortcomings of clinically used dental implants were analysed through this survey. A new structural model of dental implant was proposed on the basis of survey results. Especially, a comparative structural analysis of the new dental implant and the well known dental implants has been performed using the finite element analysis method. The analysis results confirm that the newly proposed dental implant has a good structural performance. The well known dental implants used for the comparative structural analysis are 3i implant and Sargon implant. These implants are imported dental implants and we could know that most implants clinically used are endosteal implants and these two implants(3i implant and Sargon implant) are also endosteal implants.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1998.05a
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• pp.45-50
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• 1998

최근 항공기, 자동차 및 각종 플랜트 설비의 고온용 경량 내열성 소재로서 구조용 세라믹스 재료가 큰 주목을 받고 있다. 그러나, 이러한 구조용 세라믹스 재료도 어느 이상의 고온에서는 크지 않은 응력하에서도 크립에 의한 영구 변형이 일어나서 강도 저하 및 치수 변화로 이어지며, 이로 말미암아 정밀 부품으로서의 기능을 상실할 뿐 아니라 심한 경우에는 파손에까지 이를 수 있다. (중략)

• Journal of the Korean Wood Science and Technology
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• v.39 no.6
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• pp.521-530
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• 2011

Nowadays, market demand of structural Glulam is growing and diversifying. The durability of Glulam should be significantly considered when they are intended to apply for out-door use such as timber bridge and pergola. This study was aimed to develop the manufacturing process of preservative treated structural Glulam using domestic softwood species. 10 m long structural Glulam were manufactured from domestic pitch pine logs with CuAz-3 preservative treatment. At each manufacturing process, the production yield was evaluated. Finally, bending tests were performed to verify the structural performance of manufactured Glulam. From the results, it was shown that the preservative treatment process hardly influenced on the production yield. But domestic pitch pine was proved to not be suitable for making the preservative treated Glulam due to the large difference of preservative permeability between sapwood and heartwood.