{"title":"Estimation of Visual Heterogeneity for Edge-glued Wood Panels Referred to Appearance Changes of Elements by Surface Processing","authors":"Hodaka Yamaguchi, G. Fujimaki, Masashi Nakamura","doi":"10.2488/JWRS.67.50","DOIUrl":"https://doi.org/10.2488/JWRS.67.50","url":null,"abstract":"","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":"67 1","pages":"50-59"},"PeriodicalIF":0.3,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42973709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Soei Kawamura, Satoshi Watanabe, T. Morii, M. Inoue
{"title":"Environmental and Economic Evaluation of Wooden and Reinforced Concrete Non-residential Buildings II.","authors":"Soei Kawamura, Satoshi Watanabe, T. Morii, M. Inoue","doi":"10.2488/JWRS.67.1","DOIUrl":"https://doi.org/10.2488/JWRS.67.1","url":null,"abstract":"","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43543755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takashi Ichimiya, M. Osumi, Yasuhisa Kobayashi, K. Nagasaka, M. Inoue
{"title":"Environmental and Economic Evaluation of Wooden and Reinforced Concrete Non-residential Buildings I.","authors":"Takashi Ichimiya, M. Osumi, Yasuhisa Kobayashi, K. Nagasaka, M. Inoue","doi":"10.2488/JWRS.67.14","DOIUrl":"https://doi.org/10.2488/JWRS.67.14","url":null,"abstract":"","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":"67 1","pages":"14-19"},"PeriodicalIF":0.3,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43457781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Wood Identification of Tea Rooms in the Urasenke Residence Designated as an Important Cultural Property","authors":"Suyako Tazuru, J. Sugiyama","doi":"10.2488/JWRS.67.20","DOIUrl":"https://doi.org/10.2488/JWRS.67.20","url":null,"abstract":"","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":"67 1","pages":"20-32"},"PeriodicalIF":0.3,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47011049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wataru Ishihara, Ryuya Takanashi, Y. Ohashi, Kazushige Matsumoto, Masahiko Toda, T. Uematsu
The primary object of this study is to investigate the out-of-plane shear strength property of 5-layer 5-ply CLT (Cross-laminated timber) with Japanese larch (Larix kaempferi) or Sakharin fir (Abies sachalinensis). The secondary object is to determine how the shear strength changes as the shear span increases under different loading conditions. We carried out shear strength tests by two loading methods : a three-point bending test and an asymmetric four-point bending test. We prepared several shear span conditions for each method. Results from these tests are as follows : (1) for both test methods, the shear strength of CLT with Sakharin fir was approximately 30% lower than that of CLT with Japanese larch, (2) for the asymmetric four-point bending test, specimens showed shear fracture at all span conditions, but in the three-point bending test, several specimens of CLT with Japanese larch showed bending fracture at the maximum load, and (3) for both test methods, the shear strength decreased as shear span increased according to a power curve regression. In addition, the converged values are approximately equivalent to the rolling shear strength obtained by the compression method.
{"title":"Out-of-plane Shear Strength of CLT with Japanese Larch or Sakharin Fir I.","authors":"Wataru Ishihara, Ryuya Takanashi, Y. Ohashi, Kazushige Matsumoto, Masahiko Toda, T. Uematsu","doi":"10.2488/jwrs.66.214","DOIUrl":"https://doi.org/10.2488/jwrs.66.214","url":null,"abstract":"The primary object of this study is to investigate the out-of-plane shear strength property of 5-layer 5-ply CLT (Cross-laminated timber) with Japanese larch (Larix kaempferi) or Sakharin fir (Abies sachalinensis). The secondary object is to determine how the shear strength changes as the shear span increases under different loading conditions. We carried out shear strength tests by two loading methods : a three-point bending test and an asymmetric four-point bending test. We prepared several shear span conditions for each method. Results from these tests are as follows : (1) for both test methods, the shear strength of CLT with Sakharin fir was approximately 30% lower than that of CLT with Japanese larch, (2) for the asymmetric four-point bending test, specimens showed shear fracture at all span conditions, but in the three-point bending test, several specimens of CLT with Japanese larch showed bending fracture at the maximum load, and (3) for both test methods, the shear strength decreased as shear span increased according to a power curve regression. In addition, the converged values are approximately equivalent to the rolling shear strength obtained by the compression method.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48385103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Soei Kawamura, T. Morii, Satoshi Watanabe, M. Inoue
Since the national government doesnʼt provide preferential treatment to domestic timber due to agreement with the World Trade Organization, the prefectural governments take up the role by prefectural policies. The government of each prefecture implemented the subsidy programs for residential construction which is a major demand for timber; while Akita, Gifu, and Nara prefectures implemented these subsidy programs not only for their citizens but also for house owners outside the prefecture. It is important to promote local timber usage outside the prefecture from the viewpoint of expanding sales channels. On the other hand, it is necessary to gain an understanding by the local citizens and their council because this subsidy program causes an outflow of budgets. For this purpose, it is necessary to evaluate the benefits of these systems for the prefectures. This study evaluated the economic impacts of the subsidy programs on the citizens outside the prefectures and investigated their attitude toward the program. It was found that the rate of induced production-values per payment for timber products of Akita, Gifu, and Nara prefectures was 1.44, 1.47, and 1.37, respectively. The rate of induced gross-value-added per budget of each prefecture was 4.88, 8.85, and 6.70, respectively. Induced tax-effect per budget of each prefecture was 0.129，0.345, and 0.255, respectively. According to the results of the questionnaire survey conducted for house owners, it is evident that the subsidy program of Nara increased the demand for local timber. Hence, it can be concluded that the subsidy for residential construction outside the prefecture is valid. : local wood, subsidy program, input-output analysis.
{"title":"The Evaluation of the Subsidy Program for Residential Construction Using Local Timber Built Outside the Prefecture","authors":"Soei Kawamura, T. Morii, Satoshi Watanabe, M. Inoue","doi":"10.2488/jwrs.66.195","DOIUrl":"https://doi.org/10.2488/jwrs.66.195","url":null,"abstract":"Since the national government doesnʼt provide preferential treatment to domestic timber due to agreement with the World Trade Organization, the prefectural governments take up the role by prefectural policies. The government of each prefecture implemented the subsidy programs for residential construction which is a major demand for timber; while Akita, Gifu, and Nara prefectures implemented these subsidy programs not only for their citizens but also for house owners outside the prefecture. It is important to promote local timber usage outside the prefecture from the viewpoint of expanding sales channels. On the other hand, it is necessary to gain an understanding by the local citizens and their council because this subsidy program causes an outflow of budgets. For this purpose, it is necessary to evaluate the benefits of these systems for the prefectures. This study evaluated the economic impacts of the subsidy programs on the citizens outside the prefectures and investigated their attitude toward the program. It was found that the rate of induced production-values per payment for timber products of Akita, Gifu, and Nara prefectures was 1.44, 1.47, and 1.37, respectively. The rate of induced gross-value-added per budget of each prefecture was 4.88, 8.85, and 6.70, respectively. Induced tax-effect per budget of each prefecture was 0.129，0.345, and 0.255, respectively. According to the results of the questionnaire survey conducted for house owners, it is evident that the subsidy program of Nara increased the demand for local timber. Hence, it can be concluded that the subsidy for residential construction outside the prefecture is valid. : local wood, subsidy program, input-output analysis.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44873689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kamii Nakamura, Naoyuki Furuta, J. Miyazaki, Y. Hirabayashi
{"title":"Evaluation of Decay and Shear Strength of Glued Laminated Timber Used Outdoors for 30 Years","authors":"Kamii Nakamura, Naoyuki Furuta, J. Miyazaki, Y. Hirabayashi","doi":"10.2488/jwrs.66.225","DOIUrl":"https://doi.org/10.2488/jwrs.66.225","url":null,"abstract":"","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":"66 1","pages":"225-233"},"PeriodicalIF":0.3,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43779396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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