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Effects of Sawn Splits on Buckling, Bending, and Shearing Properties in Full-Size Squared Lumber of Hinoki (Chamaecyparis obtusa) 锯缝对全尺寸扁柏(Chamaecyparis obtusa)木材屈曲、弯曲和剪切性能的影响
Journal of the Japan Wood Research Society Pub Date : 2014-01-01 DOI: 10.2488/JWRS.60.41
Yuusaku Kameyama, Yasuhiro Andou, H. Ohno, Yuusuke Anzai, F. Ishiguri, S. Yokota, K. Iizuka
{"title":"Effects of Sawn Splits on Buckling, Bending, and Shearing Properties in Full-Size Squared Lumber of Hinoki (Chamaecyparis obtusa)","authors":"Yuusaku Kameyama, Yasuhiro Andou, H. Ohno, Yuusuke Anzai, F. Ishiguri, S. Yokota, K. Iizuka","doi":"10.2488/JWRS.60.41","DOIUrl":"https://doi.org/10.2488/JWRS.60.41","url":null,"abstract":"Effects of depth (30 and 50% of lumber width) and inclination to the loaded face of sawn splits on buckling, bending, and shearing properties were investigated for full-size squared lumber (10.5 by 10.5 cm in cross section) of hinoki (Chamaecyparis obtusa Sieb. et Zucc.). No significant differences in buckling properties, and modulus of elasticity and proportional limit ratio in static bending were found between lumber without or with a sawn split. On the other hand, when load was applied to the side opposite to the sawn split, modulus of rupture in static bending was significantly decreased for all depths of sawn split. In addition, shearing strength determined by an asymmetric four-point loading method largely decreased when the load was applied to the side perpendicular to the sawn split. However, modulus of rupture in static bending and shearing strength of lumber with a sawn split with depth 50% of width exceeded the design strength requirement values of ungraded hinoki lumber listed in Bulletin No. 1452 of the Ministry of Construction, Japan. The obtained values of buckling strength in all specimens tested here were higher than the buckling strength of ungraded hinoki lumber estimated by compression design strength based on “Standard for Structural Design of Timber Structures” of the Architectural Institute of Japan.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76425271","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}
引用次数: 0
Prediction of Internal Shear Capacity of Sugi CLT Panels 杉木CLT板内抗剪承载力预测
Journal of the Japan Wood Research Society Pub Date : 2014-01-01 DOI: 10.2488/JWRS.60.169
M. Okabe, M. Yasumura, K. Kobayashi
{"title":"Prediction of Internal Shear Capacity of Sugi CLT Panels","authors":"M. Okabe, M. Yasumura, K. Kobayashi","doi":"10.2488/JWRS.60.169","DOIUrl":"https://doi.org/10.2488/JWRS.60.169","url":null,"abstract":"Cross-laminated timber (CLT) panels consist of several layers of lumber stacked crosswise and glued together on their faces. CLT panels are excellently applicable for timber buildings as slabs for horizontal structural members. Live load and dead load on CLT panels cause internal shear stress. Distribution of internal shear stress in CLT panels is affected by the modulus of elasticity of parallel layers. Rolling shear stress occurs in cross layers under shear force applied to CLT panels. Generally rolling shear strength is lower than the shear strength parallel to the grain. Few data of rolling shear strength of lumber exist. Internal shear capacity of several types of CLT panels was predicted by calculating the distribution of internal shear stress from the experimental rolling shear strength of sugi lumber. To verify the calculated shear capacity of several types of CLT cross sections, asymmetric four-point bending tests were carried out. The experimental shear capacity was found to be 12% lower than the average value of the rolling shear strength model for the lumber of the shear zone and was 16% higher than the minimum value of rolling shear strength model.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81022545","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}
引用次数: 6
Preparation of Benzylated Wood Meal by Mechanochemical Processing 机械化学法制备苯基化木粉
Journal of the Japan Wood Research Society Pub Date : 2014-01-01 DOI: 10.2488/JWRS.60.94
T. Saitou, H. Yamada, Y. Kurimoto
{"title":"Preparation of Benzylated Wood Meal by Mechanochemical Processing","authors":"T. Saitou, H. Yamada, Y. Kurimoto","doi":"10.2488/JWRS.60.94","DOIUrl":"https://doi.org/10.2488/JWRS.60.94","url":null,"abstract":"In this study, we prepared benzylated wood meal by a mechanochemical processing method, and investigated the effects of processing time and amount of reagents. Wood meal of sugi (Cryptomeria japonica D. Don) heartwood, benzyl chloride, and 40% sodium hydroxide aqueous were measured, and processed in a high-speed vibration rod mill for up to three hours at room temperature. Pre-treatment of mercerization was not done to the initial wood meal. The weight percent gain (WPG) of the processed wood meal was calculated based on the yield after washing. WPG of the benzylated wood meal was affected by the additional amount of both 40% sodium hydroxide aqueous and benzyl chloride, and the processing time. The maximum WPG was 68.8% at the processing condition of wood meal 5.0 g, 40% sodium hydroxide aqueous 7.5 g, benzyl chloride 14.0 g, and the processing time of 180 min. According to FT-IR analysis of the benzylated wood meals, the hydroxy groups (3450 cm) were increasingly replaced with benzyl groups (699 cm, 740 cm), as the WPG of wood meal increased. These results showed that the benzylation of wood meal was progressed by the mechanochemical processing method.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87913616","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}
引用次数: 0
Results of 10 Year Outdoor Exposure Tests for Sugi Glulam II. 杉木胶合板10年室外暴露试验结果
Journal of the Japan Wood Research Society Pub Date : 2014-01-01 DOI: 10.2488/JWRS.60.28
Y. Yanagawa, Kaori Mitsuna, H. Wada
{"title":"Results of 10 Year Outdoor Exposure Tests for Sugi Glulam II.","authors":"Y. Yanagawa, Kaori Mitsuna, H. Wada","doi":"10.2488/JWRS.60.28","DOIUrl":"https://doi.org/10.2488/JWRS.60.28","url":null,"abstract":"","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88306136","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}
引用次数: 0
Nondestructive Evaluation of the Heartwood Color of Standing Sugi Trees by Using the Lateral Impact Vibration Method 横向冲击振动法无损评价杉木立木心材颜色
Journal of the Japan Wood Research Society Pub Date : 2014-01-01 DOI: 10.2488/JWRS.60.35
H. Suyama
{"title":"Nondestructive Evaluation of the Heartwood Color of Standing Sugi Trees by Using the Lateral Impact Vibration Method","authors":"H. Suyama","doi":"10.2488/JWRS.60.35","DOIUrl":"https://doi.org/10.2488/JWRS.60.35","url":null,"abstract":"The heartwood color of standing sugi (Cryptomeria japonica) trees was evaluated using the lateral impact vibration method. Evaluations were obtained using the diagnostic index (DFr), which is the product of the diameter D of a stem and the resonance frequency Fr obtained when the stem is laterally impacted. The heartwood color was evaluated on the basis of the following assumptions. A lower DFr implies a higher moisture content (Mc) in the heartwood, and a higher Mc implies lower brightness (L) of the heartwood color. Therefore, a low DFr might imply a low L. Seven hundred trees were measured using this method. Seventy of the 700 trees were cut to check the color of the heartwood. The increase or decrease rate R in the DFr of each tree against the regression line of D and DFr for all the cut trees was calculated as the index for evaluating L. The calculations revealed a negative correlation between R and Mc (r=0.71) and between Mc and L (r=0.70). Further, a positive correlation (r=0.53) was observed between R and L. The correlation coefficient between R and Mc was not high, but the brightness of the heartwood color (L) of the standing sugi trees could be classified into three groups by using the index R. The use of heartwood color evaluation by this method in thinning is also discussed.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83350868","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}
引用次数: 1
Chemical Deodorant Effects of Pyroligneous Liquids from Woody Materials 木质材料热解液的化学除臭效果
Journal of the Japan Wood Research Society Pub Date : 2014-01-01 DOI: 10.2488/JWRS.60.261
S. Shibutani, S. Yamauchi, Kazuko Kirikoshi, M. Yatagai
{"title":"Chemical Deodorant Effects of Pyroligneous Liquids from Woody Materials","authors":"S. Shibutani, S. Yamauchi, Kazuko Kirikoshi, M. Yatagai","doi":"10.2488/JWRS.60.261","DOIUrl":"https://doi.org/10.2488/JWRS.60.261","url":null,"abstract":"Pyroligneous liquids from woody materials are a valuable forest resource, although they are a byproduct of charcoal production. Chemical deodorant effects of pyroligneous liquids were investigated to expand their applications. Three pyroligneous liquids, which were made from nara (Quercus serrata Thunb. and/or Quercus crispula Blume), ubamegashi (Quercus phillyraeoides A. Gray) and mosochiku (Phyllostachys pubescens Mazel), were evaluated through deodorization tests. Five chemical compounds, ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan and acetaldehyde, were adopted as sources of offensive odors. All the pyroligneous liquids showed remarkable deodorant effects on ammonia and trimethylamine, which are basic compounds. Pyroligneous liquids from nara and mosochiku had no or few deodorant effects on hydrogen sulfide and methyl mercaptan, while both the sulfur compounds showed a reduction of about 30% through a 24-hour deodorization test using pyroligneous liquid from ubamegashi. It has been clarified that considerable amounts of acetaldehyde were volatilized from all the pyroligneous liquids.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77496472","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}
引用次数: 1
Drying and Impregnation for Heavy Timbers of Sugi Heartwood II. 杉木厚材的干燥与浸渍2。
Journal of the Japan Wood Research Society Pub Date : 2014-01-01 DOI: 10.2488/jwrs.60.177
Y. Teranishi, H. Sakai, Hajimu Kaimoto, Katsunori Masuda, Yoko Tanaka, T. Itoh, I. Momohara, S. Yata, N. Fujimoto, A. Makita, Tomomi Shigeyama, Akio Yamaguchi, D. Tezuka
{"title":"Drying and Impregnation for Heavy Timbers of Sugi Heartwood II.","authors":"Y. Teranishi, H. Sakai, Hajimu Kaimoto, Katsunori Masuda, Yoko Tanaka, T. Itoh, I. Momohara, S. Yata, N. Fujimoto, A. Makita, Tomomi Shigeyama, Akio Yamaguchi, D. Tezuka","doi":"10.2488/jwrs.60.177","DOIUrl":"https://doi.org/10.2488/jwrs.60.177","url":null,"abstract":"To establish adequate pre-treatment for preservation, the effects of the drying method on preservative penetration and dimensional changes in treated wood were investigated using sugi (Cryptomereia japonica D. DON) boxed-heart timber. The high-temperature setting method reduces the amount of wood preservative impregnated in sugi heartwood specimens, as compared with natural and conventional drying methods. In some specimens dried with the high-temperature setting method, remarkable dimensional changes were observed on specimens without kerf due to surface checks which developed on the treated specimens during the drying process. Therefore a few of those specimens","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89016388","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}
引用次数: 1
Deformation Properties of Wood in Lateral Tension 木材在侧向拉伸下的变形特性
Journal of the Japan Wood Research Society Pub Date : 2014-01-01 DOI: 10.2488/JWRS.60.241
Y. Miyoshi, K. Kojiro, Y. Furuta
{"title":"Deformation Properties of Wood in Lateral Tension","authors":"Y. Miyoshi, K. Kojiro, Y. Furuta","doi":"10.2488/JWRS.60.241","DOIUrl":"https://doi.org/10.2488/JWRS.60.241","url":null,"abstract":"","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90915122","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}
引用次数: 5
A Simple Method for Estimating the Radioactive Contamination Level of a Standing Tree by Measuring its Surface Contamination Density 一种通过测量树木表面污染密度估算其放射性污染水平的简单方法
Journal of the Japan Wood Research Society Pub Date : 2014-01-01 DOI: 10.2488/JWRS.60.9
Youki Suzuki, K. Kuroda, T. Takano, Chunhua Zhang, Toshikazu Suzuki, M. Takada
{"title":"A Simple Method for Estimating the Radioactive Contamination Level of a Standing Tree by Measuring its Surface Contamination Density","authors":"Youki Suzuki, K. Kuroda, T. Takano, Chunhua Zhang, Toshikazu Suzuki, M. Takada","doi":"10.2488/JWRS.60.9","DOIUrl":"https://doi.org/10.2488/JWRS.60.9","url":null,"abstract":"","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82340972","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}
引用次数: 0
Cryo-TOF-SIMS/SEMシステムの開発と植物生体分子のトポケミカル分析への適用 Cryo-TOF-SIMS/SEM系统的开发及其在植物生物分子分析中的应用
Journal of the Japan Wood Research Society Pub Date : 2013-11-25 DOI: 10.2488/JWRS.59.367
弾 青木, 克史 黒田, 祐人 端谷, 香織 齋藤, 瑠佳 高間, 泰幸 松下, 和彦 福島
{"title":"Cryo-TOF-SIMS/SEMシステムの開発と植物生体分子のトポケミカル分析への適用","authors":"弾 青木, 克史 黒田, 祐人 端谷, 香織 齋藤, 瑠佳 高間, 泰幸 松下, 和彦 福島","doi":"10.2488/JWRS.59.367","DOIUrl":"https://doi.org/10.2488/JWRS.59.367","url":null,"abstract":"","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75847832","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}
引用次数: 3
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