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Kenji Horie,Yukiyasu Tsutsumi,Hyeoncheol Kim,Moonsup Cho,Hiroshi Hidaka,Kentaro Terada 한국지질과학협의회 2009 Geosciences Journal Vol.13 No.3
Zircon U–Pb geochronology was applied to a migmatitic gneiss in the Busan gneiss complex, Gyeonggi massif, Korea. 207Pb/206Pb ages of concordant zircon grains reveal that overgrowth rims with Th/U ratios lower than 0.1 formed at 1937 ± 6 Ma during the migmatization and mantled the inherited cores of ca. 3500–2200 Ma. The 207Pb/206Pb age of the rims is consistent with the monazite Th–total Pb age (ca. 1938 Ma), suggesting that the rims are the product of Paleoproterozoic regional metamorphism. Our zircon age data are not sufficient for discerning the tectonic affinity of the Busan gneiss complex belonging to either Gyeonggi or Yeongnam massif. However, consistency of these ages with the ca. 1930 Ma Pb–Pb age reported from the Bagdalryeong gneiss complex, Gyeonggi massif, supports the tectonic model that the Busan gneiss complex is a part of the Gyeonggi massif. Discordant U–Pb data obtained from the zircon rims (293 ± 31 Ma) and the monazite Th–total Pb age (ca. 289 Ma) suggest that the Busan gneiss complex was affected by the Early Permian regional metamorphism during the Ogcheon (Okcheon) Orogeny. Therefore, we conclude that the Busan gneiss complex is a part of the Gyeonggi massif occurring as either a basement rock of the Ogcheon (Okcheon) metamorphic rocks, or a tectonically emplaced, exotic piece affected by the Early Permian Ogcheon (Okcheon) metamorphism. In addition, our U–Pb data suggest that the Busan complex is possibly linked with the Hida–Oki terrane in Japanese Islands.
기존 공공시설의 장수명화를 고려한 개수수법에 관한 연구
히라이 켄지(Kenji HIRAI),이상준(Sangjun YI),쯔쯔미 히로키(Hiroki TSUTSUMI),코마츠 유키오(Yukio KOMATSU) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
Today in Japan, We have so many old public facilities. In Japan, External Insulation Finishing System (EIFS) have been focused on as the method to improve the performance of saving energy, and several studies of EIFS have been mainly made in cold districts. This study is to examine the effectiveness of EIFS as the Life Extension Repairing Method for existing facilities. This study is by measuring the actual condition of a school repaired with EIFS and simulation with FEM. The main results are: ① By EIFS, change of the outside surface temperature is controlled and the difference of surface temperature between outside and inside are also controlled. ② On the rooftop, EIFS is most effective in terms of control of surface temperature. ③ With FEM, the risk of cracking on the rooftop and walls is reduced by EIFS repairing.
히라이 켄지(Hirai Kenji),코마츠 유키오(Komatsu Yukio),이상준(Yi Sang-Jun),쯔쯔미 히로키(Tsutsumi Hiroki) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
Japanese government and local government in Japan have a lot of buildings and facilities which account for a third of all buildings in Japan. And the public Facilities over 30 years old account for 23% of all public facilities and it may account for 55% 10 years later. Especially public school facilities, from latter half of 1940s, the population has been increasing and many residential sections have been developing. And this has been also causing foundation of many public school facilities and we have a lot of stocks of them. Now we have to consider many elements and examine how we should manage the facilities, keeping, reselling, or dismantling. In this study, we improve one school facility by External Insulation Finishing System that is one of the ways to repair and improve buildings, and figure out how much effective the system is in terms of thermal condition, repairing cost, and electricity charges. Through this research, we can say that the case External Insulation Finishing System is used is more expensive than that usual repairing way is used. But we can also say that External Insulation Finishing System keeps structures stable condition in terms of durability, and saves electricity charges in case air-conditioner is installed.
쯔쯔미 히로키(Hiroki TSUTSUMI),이상준(Sangjun Yi),히라이 켄지(Kenji HIRAI),코마츠 유키오(Yukio KOMATSU) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
In recent years, many data management systems for public facilities maintenance are set out or build previously. However, many public facility managers bother over how to use those data to implement facility management. This report verified utilization analyses and clarified the points of using facilities data for maintenance of public facilities. As a result of the analysis with real public facilities data, it is need not to use as there are but to check unusual data. Moreover it is preferable to review the optimized categorize for the efficient facility management and the reliable maintenance program.