JR East Technical Review最新文献

{"title":"Preservation and Restoration of Tokyo Station Marunouchi Building","authors":"A. Hayashi, Isamu Suzuki","doi":"10.2749/222137815815774610","DOIUrl":"https://doi.org/10.2749/222137815815774610","url":null,"abstract":"Tokyo Station Marunouchi Building is a huge structure—an over 330 m-long and three-story high brick building completed as the central station of Tokyo about 100 years ago. The roof and the inside were burnt down in 1945 during World War II, and it had existed in a temporarily restored form since then. For the purpose of preservation and restoration of the building to its original appearance, an isolation system was adopted. Although the building has a complex location relative to nearby structures, as many as 352 isolators with 158 oil dampers have made it possible to control the shaking of the building. This work was carried out safely while many passengers used one of Japan's largest terminal stations every day","PeriodicalId":315876,"journal":{"name":"JR East Technical Review","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134119631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Life Cycle Maintenance","authors":"S. Takata","doi":"10.2493/JJSPE.65.349","DOIUrl":"https://doi.org/10.2493/JJSPE.65.349","url":null,"abstract":"People's lives are directly and indirectly supported by a variety of facilities. The ability to perform day-to-day tasks through the functioning of various facilities from that supporting individual spaces such as homes, offices, shops, and factories to that supporting networks such those as for power, waterworks, transport, and communications. It thus goes without saying that appropriate maintenance is needed for such facilities to continue to perform the functions demanded of them. In calculating life cycle cost (LCC) of these facilities, operation and maintenance (O&M) cost greatly exceeds acquisition cost in many cases. When considering that Japan will further transform into a stocktype society that accumulates social overhead capital and cherishes quality and durability over consumption, how to effectively and efficiently conduct maintenance can be said to be a major issue for society. At the same time, the importance of maintenance is on the rise also from a standpoint of resource and environmental problems. The manufacturing paradigm used up to now involving mass production, mass consumption, and mass disposal is a possible cause of problems such as global warming and resource depletion, so transforming to an environmentally sustainable manufacturing is an urgent issue. For that reason, the manufacturing industry needs to transform its role from providing goods to providing functions, achieving a system for updating functions while circulating goods. That paradigm in manufacturing is called circular manufacturing. And the innermost circulation in that is maintenance. So one has to think of ways to minimize the production of goods, meaning the need to aim to be production-free instead of maintenance-free. When thinking of maintenance as a method of dealing with a stock-type society or resource and environmental problems, the concept of facility life cycle management becomes important. In other words, maintenance must be positioned as a method of effectively exhibiting the functions of facilities though its life cycle, its efficiency increased, and its level advanced. The authors have thus proposed the concept of life cycle maintenance from that viewpoint. The following sections will give an overview of that concept, and hope that it will be of use in thinking about the role of maintenance.","PeriodicalId":315876,"journal":{"name":"JR East Technical Review","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128518239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Shinkansen Position Correcting Ground Coil for Further Speed Increases","authors":"N. Hashimoto, Takafumi Hayashi, Masakazu Sonobe, Takashi Kato","doi":"10.1299/jsmetld.2018.27.2309","DOIUrl":"https://doi.org/10.1299/jsmetld.2018.27.2309","url":null,"abstract":"Shinkansen trains recognize information on their own position while running, and transponder ground coils are set up in intervals of approx. 3 km in order to correct that position information. Current position correcting ground coils (hereinafter, the “current ground coils”) are compatible with speeds of up to 350 km/h according to specifications, so speed that they are compatible with needs to be increased in order to cope with further Shinkansen speed increases. Also, there have been cases of ground coils being damaged by blocks of snow falling from trains running at high speed in winter, so we are taking measures against snow damage in order to protect the front ends of ground coils. However, we have not been able to completely prevent damage, so ground coils resistant to snow damage are needed. In this study, we conducted basic research to develop ground coils that can handle speed increases in excess of 350 km/h and that are resistant to snow damage.","PeriodicalId":315876,"journal":{"name":"JR East Technical Review","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127947474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a New Viaduct Structure to Achieve a High-Amenity Under-Viaduct Space","authors":"Kaoru Kobayashi, H. Sugisaki","doi":"10.1201/9781439828410.ch131","DOIUrl":"https://doi.org/10.1201/9781439828410.ch131","url":null,"abstract":"This article describes a manner in which viaducts might be constructed so as to improve potential amenities for space beneath the structures. In particular, vibration caused by trains carried by the viaduct needs to be diminished in order to improve the commercial viability of such spaces. By inserting elastic materials into fit-jointed structures like beams and columns, such vibrations can be reduced. Researchers employed alternating loading tests and conducted seismic response analysis to quantify their design. The modeled viaduct was jointed with Gerber girders at each end, had a span length of 10 meters, and has seven longitudinal spans. Both traditionally jointed and elastic jointed structures were analyzed. Seismic stimulation that was used conformed to standard aseismatic standards.","PeriodicalId":315876,"journal":{"name":"JR East Technical Review","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124401626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}