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히라이 켄지(Kenji HIRAI),이상준(Sangjun Yi) 한국퍼실리티매니지먼트학회 2024 한국퍼실리티매니지먼트학회지 Vol.19 No.1
In Japan, not only renovation projects but also building projects are still focused on. Japan has a lot of historical landscape districts which are preserved. In such districts sometimes have narrow streets which make difficult to proceed building projects. Especially in building projects, many kinds of materials and machinery should be transported to several construction sites and considering environment of the site is necessary in terms of legal systems, physical features and emotion of the neighborhood. In this research, through one real building project in historical townscape district which is surrounded by narrow streets (width: about 2 meters) in two directions, every restriction is explained and points to consider in several process of construction, for example method of transportation of reinforced concrete, order of steel structure erection, prefabrication for wooden or concrete materials, and so on, are described. This study systematically organizes the aspects that need attention when considering actual construction for a project planned on a site surrounded by narrow streets. It aims to present these findings as basic reference material for planning construction in historical townscape districts, which may also occur in Korea.
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) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
According to Survey Results of the 2003 Housing and Land Survey, In Japan, there are about 47million dwelling houses and more than half of them are detached houses made of wood (about 25million). In Japan, most of the home buildings are made of wood and are by the conventional method of construction or the wood frame construction. It has been said that there are some differences between localities. Japanese life style has westernized and material distribution system has developed, we need to study about the differences again. In this study, with the cooperation of the Fixed Property Tax of the Local Tax of Bureau Division of the Ministry of Internal Affairs and Communications and 10cities(Sapporo, Aomori, Niigata, Mito, Gifu, Toyama, Kobe, Hiroshima, Takamatsu, Miyazaki), we study about some differences by comparing fixed cases in terms of building construction. These days in Japan, as a way of a supply of home buildings is more variable and Japanese life style is westernized, we can't find definite local characteristics of wooden home buildings easily like before. Especially it is not easy to find characteristics of inside buildings, interior walls, ceilings, floors and so on. But we can also find some obvious differences of floor space, roofs, exterior walls, and so on influenced by situations of building estates and climate. Through this study, we can say that the differences of wooden home buildings between localities are seen more obviously in terms of exteriors than interiors.
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.
앙케이트에 의한 지방자치단체의 공공시설관리에 관한 동향조사
후지와라 세이지(Seiji FUJIWARA),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)
Currently, many old public facilities expires service life, and its repair costs are increasing. Therefore, local governments have increased the interest in elongation and repair work, so We surveyed to grasp a trend of the whole local government. The questionnaire was sent to local governments throughout the country, and 59%(housing) and 46%(school) were collected. We compared the management of housings and schools. On a national average, interest in both elongation and repair work is high. In particular, the school was found to be positive about the earthquake resistance. However, the classification performed at the financial index, and comparing the results of whether elongation is required, in housing, there was no change by the index, but, in school, it is thought that elongation is necessary like the local government with a higher index. In facilities management, we think its problem is different policies by each local government.