• Composites Research
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• v.21 no.5
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• pp.1-8
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• 2008

In recent years, the reversed L-shaped perforated shear connector has been developed to mitigate the problem associated with headed stud and Perforbond shear connector and to simulate the simultaneous failure of concrete and shear connector. And FRP perforated shear connector has been applied to composite concrete and FRP module in the FRP-concrete composite bridge deck. The design criterion of the reversed L-shaped and FRP perforated shear connector has not been established yet since the lack of experimental and analytical study results. In this paper, the existing design equations for the Perforated were briefly discussed and the equation fur the prediction of shear resisting capacity of the reversed L-shaped and FRP perforated shear connector was suggested based on the experimental test, FEM analysis. and the existing equation for the Perfobond. The predict results obtained by the suggested equation arc compared with the experimental results, the applicability and effectiveness of suggested equation was verified.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2003.05a
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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.

• Proceedings of the Korea Concrete Institute Conference
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• 2004.05a
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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.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05a
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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.

• Proceedings of the KSME Conference
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• 2003.04a
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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.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10a
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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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• v.10 no.1
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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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• v.56 no.6
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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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• v.83 no.1
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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.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.48 no.9
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• pp.47-53
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• 2011

The signal transmission properties of the connector such as insertion loss and return loss are investigated using analysis procedure of S-parameter simulation, equivalent model extraction, and characteristic impedance calculation. S-parameter simulation is performed by connector's modeling and solving based on 3-dimensional finite element method. The connector's equivalent model of ${\pi}$ type is are proposed and extracted with an optimization process of circuit analysis simulator. The characteristic impedance of the connector is calculated with results of circuit analysis simulation and S-parameter data. According to the connector's characteristic impedance, it's revised design is carried out. In this work, the connector's effective contact area is increased and its body is applied as a high dielectric material in order to increase its capacitance and then obtain impedance matching. Therefore, return loss of the connector is improved by approximately 10 dB due to its design revision.