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GFRP를 이용한 경량합성바닥의 휨성능에 대한 실험적 평가
류재호,박세호,주영규,김상대,Ryu, Jae-Ho,Park, Se-Ho,Ju, Young-Kyu,Kim, Sang-Dae 한국강구조학회 2011 韓國鋼構造學會 論文集 Vol.23 No.1
최근 타워형 아파트구조에 많이 사용되고 있는 무량판 구조시스템을 대신해 층고절감 및 장스팬 구현 그리고 내화성능향상을 목적으로 GFRP를 이용한 경량합성바닥을 개발하였다. GFRP를 이용한 경량합성바닥은 웨브에 개구부를 가지는 비대칭 강재보 하부에 GFRP를 부착하고 슬래브에 경량체를 삽입한 중공합성바닥이다. 이에 개발된 합성바닥의 휨성능을 평가하기 위해 GFRP, 중공률, 웨브의 개구부 등을 변수로 실대 실험을 수행하였다. 그 결과 GFRP를 이용한 합성보 실험체는 기준 실험체에 비해 휨내력 및 강성 측면에서 10% 높은 성능을 나타냈으며, 구조물이 항복할 때까지 완전합성거동하였다. 항복 이후 웨브개구부 주변의 응력집중현상에 의해 연성이 감소하는 현상이 나타났으며, 최대내력점까지 미끄러짐의 발생은 미소하였다. 내력설계 측면에서는 안전율을 고려해 해석값의 85%를 설계내력으로 평가하는 것이 타당한 것으로 나타났다. To obtain a lower story height with a long span and better fire resistance, a new composite floor system using GFRP (glass-fiber-reinforced plastics) was proposed. This floor system consists of asymmetric steel with a web opening, a hollow core ball, concrete, and GFRP. To evaluate the flexural performance of the new composite floor system, an experiment was conducted. The test parameters were the presence of GFRP, the void ratio in relation to the hollow core balls, and the web opening. The test results showed that the resistance and stiffness of the specimen with GFRP were 10% higher than those of the reference specimen, and that fully composite action was accomplished up to the yielding point. After the attainment of the yield strength, the ductility of the specimen was reduced due to the stress concentration around the web openings. The slip between the concrete and steel beam, however, was small. Thus, in the design of the proposed new floor systems, it is desirable that the calculated resistance be reduced by 15%, for safety.
류재호,주영규,윤성원,Ryu, Jae-Ho,Ju, Young-Kyu,Yoon, Sung-Won 한국공간구조학회 2014 한국공간구조학회지 Vol.14 No.4
To improve the noise and vibration problems of the existing public parking systems, new floor system was proposed. This system consists of the Sandwich Plate System(SPS), steel beam and post-tensioned steel tendons. To verify the dynamic characteristics such as the natural frequency and damping ratio of the system, the free vibration test was performed. Test results showed that the natural frequency of the SPS composite beam was 23.8Hz and it was increased by 3.8% by installing the post-tensioned tendons. The damping ratio of the specimen with tendons was about 1.64%.
교육시설계획에 있어서 정보화가 미치는 영향 분석 - ICT의 보급에 의한 교육시스템의 변화에 관한 문헌 고찰을 중심으로 -
류재호(주저자) ( Ryu Jae Ho(주저자) ),류재호(교신저자) ( Ryu Jae Ho(교신저자) ) 디자인융복합학회 2018 디자인융복합연구 Vol.17 No.6
본 논문은 정보기술의 발달과 가상현실, 3D 프린팅, IoT와 같은 미래기술의 발달에 의한 교육시스템의 변화에 따른 미래교육시설의 디자인 원칙에 대한 예측을 목적으로 하고 있다. 미래지향적인 교육시설에 대한 가이드라인을 얻기 위해서 본 논문에서는 현재의 교육분야에서 다루어지고 있는 이슈와, 미래의 교육시설의 모습을 예측하고자 새로운 ICT기술의 발달로 영향을 받고 있는 현재 교육시스템을 조사하였다. 이를 통해 미래의 교육시설은 탈장소, 탈집단화, 탈집중화, 현장중심체험, 자발적 학습환경, 기술지원환경, 다목적공간, 물리적 캠퍼스의 해체, 교사와 학생의 역할변화와 같은 특징들을 가질 것으로 예측하였다. 따라서 미래의 교육시설은 제3의 교사로서의 열린 공간의 특성을 가지는 공간으로 디자인되어야 할 것이다. The purpose of this research is to predict the architectural design principles in educational facilities according to the trend of information and communications technology(ICT) and the educational system which is influenced by the futuristic cutting edge technologies such as virtual reality, 3D printing, Internet of Things(IoT). In order to acquire some design guidelines for the future educational facilities, many current issues and researches have been surveyed, which are related with the education system. Also the change of the pedagogy philosophy and method influenced by the information technologies(IT) are reviewed to capture the future image of class in educational facilities. From the previously described process, we have theses results; First, the future educational facilities will have these characteristics, such as tele-presence, customization, decentralization, experiential learning, self-learning environments, technology supported education, form follow function, no physical campus and education prosumer(producer & consumer) features. Considering the derived those characteristics, we have to prepare to design the open space for the educational facilities which can provide the cooperative environments for the students as the third teacher with the integration of those technologies.
프리스트레스트 하프 PC형 중공슬래브의 휨성능에 관한 실험적 평가
류재호(Ryu Jae-ho),장혜진(Jang Hye-jin),김상모(Kim Sang-Mo),주영규(Ju Young-kyu),김상대(Kim Sang-dae) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
The void slabs can be proposed to obtain a lower story height and reduce the weight of a building structure. To improve the construction and performance of void slabs, the combination system is developed with the prestressed half PC slabs system. To estimate the capacity of void slabs with prestressed half PC, the flexural test was performed. A total of 4 full scale specimens were produced. The flexural strength of void slabs with prestressed half PC had similar behavior with solid slab.
프리스트레스트 하프 PC형 중공슬래브의 전단 성능에 관한 실험적 평가
류재호(Ryu Jae-ho),장혜진(Jang Hye-jin),김재건(Kim Jae-keon),주영규(Ju Young-kyu),김상대(Kim Sang-dae) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
The void slabs can be proposed to obtain a lower story height and reduce the weight of a building structure. To improve the construction and performance of void slabs, the combination system is developed with the prestressed half PC slabs system. To estimate the shear capacity of void slabs with prestressed half PC, the test was performed. A total of 4 full scale specimens were produced. The void slabs with prestressed half PC had lower strength than solid slab.
류재호(Ryu, Jae-Ho) 대한건축학회 2015 대한건축학회논문집 Vol.31 No.12
The visual perception is one of the most important factors in architectural design because the understanding about outside space of human is mostly rely on the visual information from his eyes. So, there are many examples of using this kind of visual perception to create the virtual space and the ornament of architectural design with the limited circumstances in the history of architecture. One of the examples of the deception of visual perception in architectural design is the entasis style of column to provide the psychological stability of the observer. Also, the making of the deeper perception in the shallow space using the perspective principle is the another example of deception design for the observer in architectural design. The making of virtuality in the space and architectural element is one of the design methods in architecture from the ancient age. Nowadays the various technologies support this method to add the further meaning in architectural design such as expansion, variability and de-materialization of space. One example of applying the new technology in the space design is the installing of the wide display device in the wall, floor or ceiling to make the virtual image which provides realistic experience and virtual space perception of the observer. Sometimes the wall which is composed of special devices can be transparent to look through like a pane of glass. Otherwise, it can be opaque to make the independent space from the others. The using of computer graphics and sensors with actuators will create the different meanings of wall, floor and ceiling from the traditional architectural elements. This research has analyzed the virtuality concept in many architectural designs and showed the effects of this design results. The results of this paper will be useful in applying the virtuality factors in the architectural design, ornament and space, which is significant for understanding the tendency of the futuristic architectural space design.