• Composites Research
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• 제21권5호
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• pp.1-8
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• 2008

강합성교량에서 스터드 전단연결재 및 Perfobond 전단연결재와 관련된 문제를 해결하고, 콘크리트와 전단연결재가 동시에 파괴되도록 유도하기 위해 역 L형 유공판 전단연결재가 개발되었으며, FRP-콘크리트 합성바닥판에서는 FRP의 재료적 특성과 펄트루젼 생산방식을 고려하여 콘크리트와 FRP의 합성방안으로 Perfobond 형 FRP 전단연결재를 적용하고 있다. 이 연구는 기존 강재 Perfobond 전단연결재에 대한 문헌분석, 2면전단실험, 유한요소해석 등의 방법을 통해 역 L형 유공판 전단연결재, FRP 전단연결재에 대한 각각의 강도를 추정할 수 있는 강도평가식을 제안하였고, 제안한 평가식의 결과와 실험결과를 비교하여 타당성을 검증하였다.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2003년도 춘계학술대회 논문집
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• pp.65-69
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• 2003

The concept of connector is introduced as mediator between virtual environment and real environment. A connector has interest on usefulness in real world while previous interfaces of virtual reality system have focus on virtual world. A functional connector among connectors gives solution if disorientation problem in virtual environment and helps user to take out the knowledge experienced through virtual reality system in real environment. An example of a functional connector is designed and developed. Evaluation of designed and developed. Evaluation of connector will be executed later.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 춘계 학술발표회 제16권1호
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• pp.778-781
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• 2004

This paper summarizes the results of push-out test specimens with a new type of shear connector called ㄱ type perfobond rib. This connector is a flat steel plate with a number of holes punched through and strengthen rib's head part. According to experiment result, ㄱ type perfobond rib shear connector appeared that resistance force is increased than stud shear connector by $108\%$ and perfobond rib shear connector by $26\%$. The results obtained indicate that the perfobond rib connector is a viable alternative to the headed studs. An appreciable improvement in the shear capacity of the connection was observed when additional reinforcing bars were passed through the perfobond rib holes. For composite beams with concrete filled steel tubes, ㄱ type perfobond shear connectors exhibit adequate ductility and substantially higher capacities.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 춘계학술발표회 논문집(I)
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• pp.410-413
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• 2006

The ㄱ type perfobond rib shear connector is a ㄱ type flat steel plate with a number of holes punched through. This connector can be effectively used in girder with high shear. The ㄱ type perfobond rib shear connector exhibit very stiff behaviour under service load conditions and also had the characteristic of retaining a significant amount of load after the attainment of ultimate capacity. The ㄱ type perfobond rib shear connector with safety factor of 3 is applied shear connector of CFT composite girder. From static test result of CFT composite girder, relative displacement of 0.01mm measured at the service load moment. At design of the ㄱ type perfobond rib shear connector, applying safety factor of 3 was more conservative than test result.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.525-530
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• 2003

Recently an automobile industry is concerned about an automobile wiring harness system. It means that development of component modules is on the increase. An importance of the connector in one part of the modules will be enhanced. A connector is made of P.B.T. (Poly Butylene Terephthalate). PBT is resistant to the high temperature. This paper deals with thermal strain of connector. According as temperature increase, effects of the temperature and thermal strains give an analysis of the deformation using ABAQUS. This apparent thermal strain results actually from the variation of temperature. Being based on this analysis, axiomatic design applies to design parameters of the connector. As compared with CAE analysis, a performance improvement makes certain of the truth of the matter.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2000년도 가을 학술발표논문집 Vol.27 No.2 (1)
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• pp.74-76
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• 2000

공간 데이터와 같은 대용량의 데이터를 처리하는 시스템이나 다수의 클라이언트의 요구가 발생하는 시스템에서는 데이터에 대한 처리 비용 및 전용 비용으로 인한 서버 사이드의 병목 현상 및 질의 처리 속도의 저하라는 문제점을 갖는다. 본 논문에서는 이러한 문제점을 개선하기 위한 방법으로 미들웨어인 C-C Connector의 Method 및 프로토콜을 제안한다. 제안하는 C-C(Client To Client) Connector는 질의의 분석과 CIT(Client Information)의 검색을 통하여 인접한 클라이언트들의 캐쉬 데이터를 이용한 질의 처리의 가능 여부를 판단하며 인접 클라이언트와 요구 클라이언트 사이의 Connection을 형성함으로서 클라이언트-클라이언트의 질의 처리 및 데이터 전송 기능을 지원한다. 그리고 이러한 기능의 지원을 위한 서버, C-C Connector, 클라이언트 사이에서 수행되어지는 질의 처리의 프로토콜을 정의한다. 제안된 C-C Connector의 Method 및 프로토콜은 서버 사이드의 처리 비용을 현재 서버에 접속중인 클라이언트들에게 분배함으로서 서버 사이드의 병목현상과 질의 처리 시간의 지연이라는 문제점을 개선할 수 있으며 클라이언트 사이드에서의 반응 속도의 향상과 현재 연결된 시스템의 처리 성능을 최대한 활용할 수 있다는 장점을 갖는다.

• Design & Manufacturing
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• 제10권1호
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• pp.1-6
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• 2016

In this study, the modification structure design of insulation displacement connector developed was considered for simplification of assembly process. The modified connector consisted terminal, wafer and fitting nails. The separation behavior under locking condition for pitch 1.25mm wire to board connector was measured and the apparatus for the test was made. The maximum restraining force was measured about 4.5kgf that was bigger value than the specification limit. And the pulling force of a wire was also indicated about 2.3kgf.

• Structural Engineering and Mechanics
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• 제56권6호
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• pp.983-1001
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• 2015

This study focuses on the load carrying capacity and the force transfer mechanism of multi-hole perfobond shear connectors in steel-concrete composite structure. The behavior of multi-hole perfobond shear connector is more complicated than single-hole connector cases. 2 groups push-out tests were conducted. Based on the test results, behavior of the connection was analyzed and the failure mechanism was identified. Simplified iterative method and analytic solution were proposed based on force equilibrium for analyzing multi-hole perfobond shear connector performance. Finally, the sensitivity of design parameters of multi-hole perfobond shear connector was investigated. The results of this research showed that shear force distribution curve of multi-hole perfobond shear connector is near catenary. Shear forces distribution were determined by stiffness ratio of steel to concrete member, stiffness ratio of shear connector to steel member, and number of row. Efficiency coefficient was proposed to should be taking into account in different limit state.

• Structural Engineering and Mechanics
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• 제83권1호
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• pp.109-121
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• 2022

Twelve push-out test specimens were conducted with various parameters to study the static and fatigue performance of a new through-bolt shear connector transferring the shear forces of interface between prefabricated hybrid fiber reinforced concrete (HFRC) slabs and steel girders. It was found that the fibers could improve the fatigue life, capacity and initial stiffness of through-bolt shear connector. While the bolt-hole clearance reduced, the initial stiffness, capacity and slippage of through-bolt shear connector increased. After the steel-concrete interface properties were improved, the initial stiffness increased, and the capacity and slippage reduced. Base on the test results, the equation of the load-slip curve and capacity of through-bolt shear connector with prefabricated HFRC slab were obtained by the regression of test results, and the allowable range of shear force under fatigue load was recommended, which could provide the reference in the design of through-bolt shear connector with prefabricated HFRC slabs.

• 대한전자공학회논문지TC
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• 제48권9호
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• pp.47-53
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• 2011

본 논문에서는 커넥터의 특성임피던스 추출, 분석 방법 및 설계 변경 방법을 제안하고 임피던스를 정합하여 신호 전달 특성을 개선한다. 3차원 FEM(Finite Element Method) 전자기장(Electro-Magnetic Field) 시뮬레이터를 이용하여 커넥터의 S-파라미터를 계산하고 반사손실 및 삽입손실을 추출한다. 커넥터의 신호 전달 특성은 반사손실이 0.9 GHz 이후부터 -20 dB 이상의 값으로 높게 나타났다. 신호 전달 특성이 낮은 원인을 파악하기 위해서 회로 해석 시뮬레이터를 이용하여 커넥터의 등가 회로 모델을 추출하고 특성임피던스를 계산하였다. 커넥터의 특성임피던스는 $90.3{\Omega}$으로 임피던스 부정합이 발생하여 신호 전달 특성이 저하되었다. 따라서 신호 전달 특성을 개선할 목적으로 임피던스를 정합하기 위해서 커넥터의 커패시턴스를 증가시켰다. 이러한 설계 방안으로 커넥터 신호선의 유효 면적을 확장하고, 커넥터의 몸체 소재로 고유전체를 사용하였다. 설계 변경된 커넥터의 특성임피던스는 $58.6{\Omega}$으로 임피던스 정합에 보다 근접하여 커넥터의 반사손실이 대략 10 dB 향상되었다. 신호선의 유효 면적 증가에 의한 반사손실 개선과 고유전체의 적용으로 전자기파의 신호선 주변 집중에 의해서 삽입손실 또한 개선되었다.