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손성곤(Son, Seong-Gon),박민재(Park, Min-Jae),류재호(Ryu, Jae-Ho),주영규(Ju, Young k.) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.2
As the threat of terrorist attacks or explosive accidents increases, interest in design and construction of blast resistant structures has increased. Recently, the blast reinforcement for existing buildings which were not designed to resist blast loading has been issued, and the demands for blast protective materials are continually growing. This study investigates the analytical study for evaluating impact resistance capacity and failure mode of PROTECT (Poly Resilience-Oriented hybrid TEChnology plaTe) panel. PROTECT panel is a composite panel with two steel plates and nano-composite. Since it is a multi-layer structure, there are advantages for the blast resistance. The impact resistance analysis of PROTECT panel is performed with the impact energy, the thickness of the steel plates and nano-composite as variables. In order to perform impact analysis, dynamic properties of steels and nano-composite were determined. Finite element analysis is performed with these properties under the drop-weight impact. From the finite element analysis, different failure modes corresponding to different impact energy is derived.
손성곤(Sung-Gon Son),유진오(Jin-O You),김진형(Jin-Hyoung Kim),이인규(In-Gyu Lee),손영호(Young-Ho Son) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.10
터널 현장에서 주요 지보재로 사용되는 록볼트는 터널내 원지반에 정착시켜 지반의 변형에 저항하고 이완 암괴의 붕락을 억제시키는 역할을 하며, 발파에 의한 지반거동에 대처하기 위해 조기 성능 발휘가 요구된다. 국내 시방기준을 참고하면 지반특성 및 현장시공여건에 따라 다양한 종류(재질, 정착방법 등)의 록볼트를 사용하도록 규정되어 있으나, 여러 제약조건으로 대부분 기존방식을 답습하는 형태로 설계와 시공이 이루어지고 있다. 터널에서의 작업조건은 주변환경, 지반상태, 지하수 유출 유무와 이에 따른 작업 Cycle 등에 따라 달라지며, 특히 용출수 구간은 일반구간에 비해 절리가 많고 암반붕락 가능성이 높아 록볼트 시공시 보다 세심한 주의가 필요하다. In tunneling, rockbolt, shotcrete and steel rib have been widely used to ensure the stability of the tunnel structures and to prevent falling of crushed rock during tunneling. In general, the rockbolt is mainly used with reinforced steel. However, steel bar or the materials with the same strength can be used depending on the rock conditions, ground water outflow condition, and the surrounding of applying location. In Korea, most tunnel construction sites have used cement mortar or resin for steel reinforcement on the rock. Due to the ground water outflow in the construction site, the usability of steel reinforcement is poor and it requires curing time especially after installing.
다양한 현장조건에서 튜브형 강관 록볼트의 시공사례 연구
손성곤(Sung-Gon Son),유진오(Jin-O You),김진형(Jin-Hyoung Kim),이인규(In-Gyu Lee),정재민(Jae-Min Chung) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.5
In tunneling, rockbolt, shotcrete and steel rib have been widely used to ensure the stability of the tunnel structures and to prevent falling of crushed rock during tunneling. In general, the rockbolt is mainly used with reinforced steel. However, steel bar or the materials with the same strength can be used depending on the rock conditions, ground water outflow condition, and the surrounding of applying location. In Korea, most tunnel construction sites have used cement mortar or resin for steel reinforcement on the rock. Due to the ground water outflow in the construction site, the usability of steel reinforcement is poor and it requires curing time especially after installing. A tube type steel rockbolt has been developed to reduce the cost and increase its applicability at harsh construction conditions. In this study, introduces the development of a tube type steel rockbolt, as well as presents the field testing and performance results.