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RISS 인기검색어
- 검색키워드
- 저자 : 심종성(Jong-Sung Sim) (검색결과 103 건)
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A Study on the Sensitivity of Reinforced Concrete Element Design Factors
심종성,Sim, Jong Sung Korean Society of Civil Engeneers 1989 대한토목학회논문집 Vol.9 No.4
변형율 속도를 고려할 수 있는 철근콘크리트부재 해석모델을 이용하여 서로 다른 설계인자를 가지는 철근콘크리트부재의 하중 재하속도에 따른 민감성을 연구하였다. 수행된 연구결과에서 정적하중에서부터 동적하중을 받는 부재의 압축거동 및 휨거동특성은 서로 상이함을 발견하였다. 본 논문에서는 또한 하중재하속도에 따른 철근콘크리트부재의 압축강도 및 휨강도를 계산할 수 있는 설용적인 설계공식을 제안하였다. A strain rate-dependent element model was used to study the loading rate-sensitivity of R/C beams and columns with different design factors. Conclusions were derived regarding the differences between the element axial/flexural performance under impulsive and quasi-static loads. Practical design formalas for predicting the loading rate-dependent axial and flexural strengths of R/C elements were also suggested.
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순환골재의 사용성 확대를 위한 연구: 원심력콘크리트로의 적용
심종성,박철우,박성재,김현중,김태광,이만석,Sim, Jong-Sung,Park, Cheol-Woo,Park, Sung-Jae,Kim, Hyun-Jung,Kim, Taeg-Wang,Lee, Man-Suk 한국건설순환자원학회 2006 한국건설순환자원학회지 Vol.2 No.1
Along with recent improvement of recycling technique, the quality of the recycled concrete aggregate have become very competitive to the natural concrete aggregate. Therefore, a practical use of the recycled concrete aggregate may be possible for structural members. Majority studies about the recycled concrete aggregate was emphasized a limitation of fundamental study concerned with a strength characteristics and durability of the recycled aggregate concrete, there is use for the structural members. Therefore, for the extension of application of recycled concrete aggregate, this investigation verifies the strength characteristics recycled concrete aggregate of the spun-concrete products with various coarse and fine recycled aggregate replacement ratio(coarse recycled aggregate: 0%, 20%, 40%, 60%, 100%; fine recycled aggregate: 0%, 30%, 60%, 100%) and with addition of cellulose fibers(0%, 0.01%, 0.03%, 0.05%, 0.08%). From the test results, The strength of spun concrete used with recycled aggregate [NR specimen], was measured as 72MPa, was found to be very approximately to the strength of spun concrete used with the natural aggregate(NN specimen), was measured as 74MPa, when only fine aggregate was replaced with the recycled. Therefore, the fine recycled concrete aggregate can be successfully used in the spun high strength concrete product. The compressive strength of all specimens used the specialty cellulose fiber were measured as about 70M Pa, however, the increasement of the specialty cellulose fiber content is showed to decrease compressive strength of spun concrete. Therefore, it is anticipated that the specialty cellulose fiber can be applied to the various spun concrete products.
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심종성,Sim, Jong Sung Korean Society of Civil Engeneers 1989 대한토목학회논문집 Vol.9 No.2
변형률 속도를 고려할 수 있는 철판과 콘크리트의 재료특성모델을 이용하여 여러가지 하중 재하속도를 받는 철근콘크리트부재의 압축 및 휨 거동 예측이 가능한 해석모델을 개발하였다. 개발된 철근콘크리트부재 해석모델을 적용한 해석 결과는 정적하중에서부터 동적하중을 받는 철근콘크리트부재의 실험결과와 비교적 양호하게 일치하였다. The strain rate-sensitive constitutive models of steel and concrete were incorporated into a refined analytical procedure for loading rate-dependent axial/flexural analysis of reinforced concrete beam-columns. The predictions of the analytical technique compared well with both quasi-static and dynamic test results on reinforced concrete elements.
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탄소섬유쉬트로 보강된 철근콘크리트보의 계면박리에 대한 해석적 연구
심종성,배인환,Sim, Jong-Sung,Bae, In-Hwan 한국콘크리트학회 1999 콘크리트학회지 Vol.11 No.2
The purpose of this study is to analyze the interface debonding of RC beams strengthened by carbon fiber sheet(CFS). The behavior of damaged RC beams strengthened with CFS is analytically investigated next using linear elastic fracture mechanics(LEFM) approach and the finite element method. The study includes an investigation of the separation mode by interface fracture of the strengthening materials due to the interfacial shear and normal stresses. The numerical method is presented to obtain the value of interfacial fracture parameter such as the strain energy release rate. Based on the results of this study, it is found that the critical case occurs when the interfacial cracks occur within a short region of the flexural crack. The CFS strengthening has not an adequate factor of safety against interfacial debonding of CFS. Furthermore, for the thicknesses of the adhesive studied[1mm~3mm], it is no noticeable effect on the strain energy release rate.
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심종성 ( Sim Jong-sung ),강태성 ( Kang Tae-sung ),이용택 ( Lee Yong-taek ),박성은 ( Park Seong-eun ),이형호 ( Lee Hyoung-ho ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
In this study, a GFRP material was employed instead of steel to increase the strength of rock bolts, improve their corrosion resistance, and satisfy requirements for permanent support. Basic data were proposed to introduce the GFRP rock bolts by comparing them with the existing conventional steel rock bolts, and to evaluate the performance of the GFRP rock bolts through a shearing test.
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GFRP plate 인장 실험 방법에 대한 실험적 연구
심종성(Sim, Jong-Sung),김현중(Kim, Hyun-Joong),이형호(Lee, Hyoung-Ho),이종윤(Lee, Jong-Yun),전홍민(Jeon, Hong-Min) 한국구조물진단유지관리학회 2010 한국구조물진단학회 학술발표회논문집 Vol.2010 No.2
As the attempt that directly applies GFRP Plate to structural members recently increases, researches for clarification of mechanical property of GFRP Plate's material are being progressed. But in case of "DETERMINATION OF TENSILE PROPERTIES OF PLASTICS" of domestic KS M ISO 527 based on regulations of ACI 440.3R-04, ASTM D 3039, when sliding of a part holding the GFRP Plate directly occurs or it is experimented after being manufactured as a dumbbell type, it is connected to local failure of a region of a section instead of the central part, so it is difficult to clarify material tensile properties of practical GFRP. Accordingly, this research progressed an experiment by 4 kinds of proposed methods with different length from 2 kinds of proposed experimental methods that have different biting tools in the minimum length with the standard of a GFRP's tension test by the current Korean Industrial Standard. As an experimental result, in case of the existing grip type tension test method that grips and pulls, although many problems occur, the method hanging and pulling after attaching biting tools firmly with epoxy which is a proposed method appeared as the most effective experiment method.
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