• Proceedings of the Korean Fiber Society Conference
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• 2003.04a
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• pp.362-363
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• 2003

직포매트(Woven Ggeotextiles)는 연약지반 보강, 도로포장 등에 주로 사용되고 있지만, 간척지 지반 공사 및 해안지역 LNG 저장고 공사 둥에도 보강용 및 오탁방지막의 막체로도 이용되고 있다 한편, 장기간 시공의 경우 현장에서 대부분 커버를 씌운 상태로 야적, 보관되거나 일차 포설된 채로 한달 이상 경과하는 경우도 발생하게 되어 일광이나 자외선 등에 노출된 채로 있기 때문에 설계 인장강도의 저하를 초래하거나 열수축에 의한 치수변형이 발생하기도 한다. (중략)

• Proceedings of the Korea Concrete Institute Conference
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• 2009.05a
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• pp.509-510
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• 2009

In strengthening reinforced concrete beams using fiber reinforced polymer sheets, brittle structural failures occur due to the linear stress-strain relationship of the fibers. Hybrid fiber reinforced polymer sheets using two different types of fibers were investigated in this study

• Journal of the Korea institute for structural maintenance and inspection
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• v.15 no.4
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• pp.155-164
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• 2011

In the case of impact loading test, measurement of the test data has difficulties due to fast loading velocity. In addition, the dynamic behaviors of specimens are distorted by ignoring local fracture. In this study, therefore, finite element analysis which considers local fracture and strain rate effect on impact load was performed by using LS-DYNA, an explicit analysis program. The one-way and two-way specimens strengthened with FRP Sheets and steel fibers were considered as analysis models. The results showed that the impact resistance of steel fiber reinforced concrete (SFRC) and ultra high performance concrete (UHPC) was enhanced. In the case of specimens strengthened with FRP Sheets, GFRP was superior to CFRP in the performance of impact resistance, and there was little effect of the FRP Sheet orientation. The reliability of this analysis model was verified by comparing with previous experimental results.

• Journal of the Korean Society for Advanced Composite Structures
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• v.6 no.4
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• pp.58-63
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• 2015

The purpose of this experimental research is to evaluate the workability and strength properties of hybrid fiber reinforced concrete containing amorphous steel fiber and organic fiber. For this purpose, the hybrid fiber reinforced concrete containing amorphous steel fiber(ASF) with polyamide(PA) and polyvinyl alcohol(PVA) fiber, respectively were made according to their total volume fraction of 0.5% for water-binder ratio of 33%, and then the characteristics such as the workability, compressive strength, and flexural strength of those were investigated. It was observed from the test results that the workability and compressive strength at 7 and 28 days were decreased and the flexural strength at 7 and 28 days was increased with increasing ASF and decreasing organic fiber.

• Computational Structural Engineering
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• v.8 no.2
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• pp.133-140
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• 1995

The buckling analysis of Glass Fiber Reinforced Plastic pipes was studied through a three dimentsional finite element method. In the finite element analysis, an improved degenerated shell element with incompatible modes and assumed shear strain fields are employed with 3 displacements and 2 rotations for each joints. Buckling analysis is carried out for various thicknesses and different fiber orientations. Finite element results show that the buckling load increases as the thickness does with the variation of coupling stiffness.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.05a
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• pp.128-129
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• 2014

In this study, flowability of the mortar added with length change and combination of steel and inorganic fiber has been tested to evaluate the performance of fiber-reinforced mortar. The following results could be made as the conclusion. Early age flow of the mortar has been decreased when fibers added. Slump also decreased with the adding of fibers. For the air content, comparing with Plain, all the specimens with fibers showed higher air content than Plain., Addition of every kinds fibers showed the similar EIS test results.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.433-434
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• 2010

This research was conducted length variation test for analyze the characteristics of shrinkage of concrete pavement along with changes of respective kinds of fibers. As a result, fiber-reinforced concrete has showed tendency that of enhanced performance compared to Plain in every kinds of shrinkage resistance performance especially on drying shrinkage. For the case of using domestic polypropylene fiber, a drying shrinkage has resulted in about 75% decrease compared to Plain.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.65-66
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• 2019

In this study, flexural strength and impact resistance were evaluated to investigate the fiber length effect of amorphous metallic fiber. As a result, in the case of 30AFRCC, cutoff behavior due to excellent bonding performance by large specific surface area has greatly influence on the flexural and impact resistance performance. In the case of 15AFRCC, the bonding efficiency is relatively low, because the specific surface area is smaller than that of 30AFRCC and the number of fiber is large, so the effect of improving the flexural and impact resistance performance is smaller than that of 30AFRCC.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2009.11a
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• pp.153-156
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• 2009

This study investigated the fundamental properties corresponding to various length changes on NY fiber reinforced concrete. For results of fresh concrete, the slump and air content were declined, but the unit volume weight and vebe time were increased. For the hardened concrete properties, the compressive strength showed increasing tendency according to the NY fiber length. The dry and autogenous shrinkage also decreased compared with Plain. Generally, the caes that 19 mm NY fiber was used was better than any other cases.

• Magazine of the Korea Concrete Institute
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• v.4 no.2
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• pp.93-101
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• 1992

강섬유를 혼입한 고강도 콘크리트의 강도 특성에 관한 연구를 수행하였다. 이를 위하여 고성능 감수제를 이용하여 제조한 고강도 콘크리트에 강섬유를 0, 0.5, 1.0, 1.5%로 변화시키면서 실험을 실시하였고, 또한 강섬유의 길이와 휨 시험편의 크기에 따른 강도의 변화에 대하여도 연구하였다. 연구결과 강섬유 보강 고강도 콘크리트의 압축강도는 강섬유의 혼입률에 따라 크게 영향을 받지 않으나, 할열인장강도와 휨강도는 강섬유 혼입률과 길이에 따라 크게 증가하였고, 특히 최대하중을 지나서도 응력의 감소가 작아 연성이 크게 증가하는 것으로 나타났다.