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연속 CIP 공법으로 형성된 PUS 부재의 단면 설계 및 휨 강도 산정
김승훈,노삼영,홍성진,김갑수,한범석,Kim, Seung-Hun,Noh, Sam-Young,Hong, Seong-Jin,Kim, Kap-Soo,Han, Byum-Seok 대한건축학회 2012 대한건축학회논문집 Vol.28 No.6
Recently the Permanent Uni-wall System (PUS) has been developed which improved the disadvantage of the CIP and could be used as permanent retaining wall. The sections of PUS members are molded with circle casing form and deformed casing form. In the generality of cases, deformed casing section consists of reinforced concrete because of the concrete cover by code and the method of concreting with tremie pipe. But, circle casing section can be designed with various structural types which are steel, reinforced concrete, and steel reinforced concrete(SRC). In this study, design methods for PUS section were proposed and two types of PUS section were tested to investigate the flexural strength and behaviors. Variable was the details of circle casing section which were the deformed bars and the shear reinforcements surrounded H beam. All specimens failed due to concrete crushing. Specimen with SRC section in circle casing showed more ductile behavior after ultimate flexural strength than the other specimen. Nominal flexural strengths by section analysis and design code based on a strain-compatibility approach were compared with test results. These comparisons showed that PUS section possessed the flexural strength by design code.
몰드 오실레이터 이중구조 실린더의 정현파 진동 특성을 이용한 위치동기화 알고리즘 개발
김승훈,최두철,공남웅,김상우,Kim, Seung Hun,Choi, Doo Chul,Kong, NamWoong,Kim, Sang Woo 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.21 No.8
Improvement in the control strategy for continuous casting is a crucial requirement to enhance the slab's quality and to increase productivity. The mold oscillator adopts the dual cylinders due to its heavy weight, so the synchronized motion of two cylinders is an important aspect when precise control is needed. The conventional method uses the master-slave control applied to the valve input reference, but the synchronization performance should still be improved. This paper proposes a novel synchronization algorithm for dual cylinders used in a mold oscillator. The master-slave concept is applied to the target reference position, that is, the slave target reference position is controlled to match the slave cylinder's position with the master cylinder's position. In the simulation based on a Simulink model, the proposed algorithm shows a better synchronization performance in aspect of the mean of the absolute error and the peak synchronization error.
영상 스트리밍 서비스를 위한 우선순위 버퍼 혼잡제어 알고리즘
김승훈,최재원,최승식,Kim, Seung-Hun,Choi, Jae-Won,Choi, Seung-Sik 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.4B
최근 네트워크 기술이 발전하면서 사용자들의 요구가 다양화되고 대용량의 멀티미디어 데이터에 대한 필요성이 증가하고 있다. 실시간성과 동시성이 중요시 되는 멀티미디어 데이터의 전송에는 UDP(User Datagram Protocol) 트래픽이 사용되고 있는데, UDP 트래픽은 현재의 인터넷 기반인 TCP(Transmission Control Protocol) 트래픽과 경쟁 관계에 있어 네트워크의 혼잡을 초래하는 경우가 많았다. 반면 TCP 트랙픽은 네트워크의 혼잡제어를 수행하지만 수신자의 관점을 고려하지 않은 점이 있어서 스트리밍 전송에는 적합하지 않은 단점을 가지고 있다. 본 논문에서는 네트워크의 형평성 문제를 해결하고 수신자의 관점에서 RTP/RTCP(Real-time Trasport Protocol/Realtime Transport Control Protocol)를 기반으로 하는 네트워크 알고리즘을 제안한다. 네트워크에 우선순위를 적용하여 수신자의 버퍼를 고려한 혼잡제어 알고리즘인 POBA(Priority-Ordered Buffer Algorithm)는 시뮬레이션 결과를 통해 우선 순위가 없는 기존 네트워크에 비해 패킷 손실률과 버퍼 점유도 면에서 스트리밍 전송에 적합한 환경을 제공하고 있음을 확인할 수 있었다. According to the recent development of network technology, the demands of users are diversified and the needs of multimedia traffic are increasing. In general, UDP(User Datagram Protocol) traffic is used to transport multimedia data, which satisfied the real-time and isochronous characteristics. UDP traffic competes with TCP traffic and incur the network congestion. However, TCP traffic performs network congestion control but does not consider the receiver's status. Thus, it is not appropriate in case of streaming services. In this paper, we solve a fairness problems and proposed a network algorithm based on RTP/RTCP(Real-time Transport Protocol/Realtime Transport Control Protocol) in view of receiver status. The POBA(Priority Ordered Buffer Algorithm), which applies priorities in the receiver's buffer and networks, shows that it provides the appropriate environment for streaming services in view of packet loss ratio and buffer utilization of receiver's buffer compared with the previous method.
하지철물 접합부 유격방지 브라켓을 적용한 접합부의 거동에 관한 실험적 연구
김승훈 ( Kim Seung Hun ),백기열 ( Baek Ki Youl ),김성범 ( Kim Seong Beom ),김권식 ( Kim Kown Sik ),홍성욱 ( Hong Seong Uk ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
In recent years, non-welded building hardware that can be installed by bolt assembly is used, which does not require fire prevention related materials, fire fighting equipment and personnel. However, there is a need for a method to compensate for the occurrence of buckling at the bolted portion at the time of construction.The purpose of this study is to evaluate the behavior of joints that can control the sliding between members by using anti slip brackets.
콘크리트 강도 변화에 따른 강재 평판의 부착강도에 대한 실험적 연구
김승훈 ( Kim Seung-hun ),박상아 ( Park Sang-ah ),황환명 ( Hwang Hwan-myung ),이용택 ( Lee Yong-taeg ),박해용 ( Park Hae-yong ) 한국구조물진단유지관리공학회 2023 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.27 No.1
최근 평판을 보강재로 사용한 합성기둥 공법이나 합성보 공법 등이 제시되어있지만 국내 건축구조기준에는 콘크리트 내 평판의 부착강도에 대한 규정이 명확하지 않다. 본 연구에서는 콘크리트에 매립된 평판에 대한 인발 실험을 통하여 콘크리트 압축강도가 부착강도에 미치는 영향을 평가하고자 한다.