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An Estimation of Damage Index of RC Column Using Classifier with Deep Learning of Shear Failure Characteristics 基于深度学习剪力破坏特征分类器的RC柱损伤指标估计
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.34.83
Tomokazu Yoshioka, Hirotaka Kunitomo
{"title":"An Estimation of Damage Index of RC Column Using Classifier with Deep Learning of Shear Failure Characteristics","authors":"Tomokazu Yoshioka, Hirotaka Kunitomo","doi":"10.3151/crt.34.83","DOIUrl":"https://doi.org/10.3151/crt.34.83","url":null,"abstract":"","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","volume":"3 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":"134601171","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
A Study on the Applicability of Double Flare-Bevel-Groove Welds to D51 Rebar D51螺杆钢双喇叭口-坡口焊缝适用性研究
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.32.73
T. Tosaki, Koji Sato, T. Nihei, M. Ikeda
{"title":"A Study on the Applicability of Double Flare-Bevel-Groove Welds to D51 Rebar","authors":"T. Tosaki, Koji Sato, T. Nihei, M. Ikeda","doi":"10.3151/crt.32.73","DOIUrl":"https://doi.org/10.3151/crt.32.73","url":null,"abstract":"Synopsis : In this study, we considered the applicability of double flare-bevel-groove welds to D51 rebar. First, to investigate the effect of welding posture, some welding experiments were done. From the result, it was confirmed that reduction of the throat thickness by 1.7 mm is required when calculating weld leg length. Next, to establish the design embedment length of D51 rebar with double flare-bevel-groove welds, tensile test and repeated tensile test were conducted in accordance with applicable Japanese technical guidelines. As a result, it was confirmed that 5 times the rebar diameter suffices as the embedment length of D51. Finally, in double flare-bevel-groove welds, eccentric bending moment is caused by the difference in the centroid position between the rebar and steel plate, so we proposed a method for calculating the required steel plate thickness to prevent steel plate yielding over the service period.","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","volume":"103 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":"133640329","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
Structural Performance Deterioration Index of Reinforced Concrete Cultural Property Buildings 钢筋混凝土文化财产建筑结构性能劣化指标研究
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.32.59
N. Takahashi, Keisuke Sato
{"title":"Structural Performance Deterioration Index of Reinforced Concrete Cultural Property Buildings","authors":"N. Takahashi, Keisuke Sato","doi":"10.3151/crt.32.59","DOIUrl":"https://doi.org/10.3151/crt.32.59","url":null,"abstract":"Synopsis : Most RC buildings with cultural value constructed over 50 years ago have structural safety problems. To continue maintenance and conservation of these buildings, evaluation of safety performance is required. In this study, on-site surveys of existing RC cultural property buildings were conducted to classify the degree of deterioration of their structural members. Further, a comparative investigation of methods of applying reduction factors of structural performance according to the degree of deterioration that were proposed in previous studies to actual RC cultural properties was carried out. Finally, based on the findings of this study, a procedure for investigating the degree of deterioration of RC cultural heritage buildings and reflecting it in seismic performance evaluation is proposed.","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","volume":"19 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":"114885796","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
Estimation of Airborne Chloride in Consideration of Wind Conditions and Surrounding Topography 考虑风况和周围地形的空气氯离子估算
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.33.1
Yuto Tamura, T. Saeki, Tsuyoshi Saito
{"title":"Estimation of Airborne Chloride in Consideration of Wind Conditions and Surrounding Topography","authors":"Yuto Tamura, T. Saeki, Tsuyoshi Saito","doi":"10.3151/crt.33.1","DOIUrl":"https://doi.org/10.3151/crt.33.1","url":null,"abstract":"purpose this study to formulate an estimation method for airborne chloride in consideration of wind conditions and surrounding topography. The relation between wind conditions from AMeDAS or MSM (Meso Scale Model) and the amount of airborne chloride was studied. As a result, it was confirmed that the amount of airborne chloride is proportional to the square of wind velocity when the wind velocity is 4 m/s or higher. Because the frequency of the square of wind velocity of 4 m/s or higher calculated by a statistical method using Box-Cox transform follows a normal distribution, the sum total value of the square of the wind velocity for one year was estimated by interval estimation. Furthermore, the estimation of the amount of airborne chloride was performed in consideration of the surrounding topography using LightGBM, which is an algorithm for machine learning. The estimation results generally agreed with the measured values. Further, the influences of the surrounding topography on the amount of airborne chloride were visualized by using SHAP values.","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","volume":"18 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":"123360833","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
A Method for the Determination of Major Chemical Components of Fly Ash by X-ray Fluorescence Method Using Glass Beads— Applicability Evaluation — 玻璃微珠x射线荧光法测定粉煤灰主要化学成分的适用性评价
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.33.61
Takeshi Yamamoto
{"title":"A Method for the Determination of Major Chemical Components of Fly Ash by X-ray Fluorescence Method Using Glass Beads— Applicability Evaluation —","authors":"Takeshi Yamamoto","doi":"10.3151/crt.33.61","DOIUrl":"https://doi.org/10.3151/crt.33.61","url":null,"abstract":"","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","volume":"26 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":"123121937","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
Experimental Study on Bending Performance of Beams with Stainless Steel Bars for Highway Bridges 公路桥梁不锈钢筋梁抗弯性能试验研究
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.33.51
Takumi Kobayashi, Yuijyun Ikeda, A. Takeuchi, M. Ishida
{"title":"Experimental Study on Bending Performance of Beams with Stainless Steel Bars for Highway Bridges","authors":"Takumi Kobayashi, Yuijyun Ikeda, A. Takeuchi, M. Ishida","doi":"10.3151/crt.33.51","DOIUrl":"https://doi.org/10.3151/crt.33.51","url":null,"abstract":"","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","volume":"22 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":"121201277","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
機械学習を援用したコンクリートの乾燥収縮に対する骨材の影響分析 使用机器学习的骨料对混凝土干燥收缩的影响分析
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.34.37
Yuriko Okazaki, S. Okazaki, S. Asamoto, K. Imamoto
{"title":"機械学習を援用したコンクリートの乾燥収縮に対する骨材の影響分析","authors":"Yuriko Okazaki, S. Okazaki, S. Asamoto, K. Imamoto","doi":"10.3151/crt.34.37","DOIUrl":"https://doi.org/10.3151/crt.34.37","url":null,"abstract":"","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","volume":"86 16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133749088","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
Mechanical Model of Cylindrical Shear-key Applied to Seismic Retrofitted Joint of Concrete Structure 应用于混凝土结构抗震加固节点的圆柱剪力键力学模型
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.30.11
T. Abe, T. Hiwatashi, Y. Takase, K. Katori
{"title":"Mechanical Model of Cylindrical Shear-key Applied to Seismic Retrofitted Joint of Concrete Structure","authors":"T. Abe, T. Hiwatashi, Y. Takase, K. Katori","doi":"10.3151/crt.30.11","DOIUrl":"https://doi.org/10.3151/crt.30.11","url":null,"abstract":"Synopsis : The authors studied cylindrical shear-keys for use instead of concrete roughening for seismic retrofitted joints. Assuming actual construction, combined use of post-installed anchors and cylindrical shear-keys was investigated. The ultimate purpose of the study was to elucidate the mechanical behavior of such combination and to propose a mechanical model. In this paper, the test results are organized for each failure model (bearing failure, shear-off failure), and a mechanical model of cylindrical shear-keys including the post-peak area is proposed. The mechanical model was shown to be capable of largely satisfactory reproduction of the test results.","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","volume":"4 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":"125226335","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
Experimental Study on Reinforcement Effect of Post-Installed Shear Reinforcement on a Reinforced Concrete Column 钢筋混凝土柱后剪配筋加固效果试验研究
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.34.61
Tatsushi Yamada, Y. Takemoto, Yuuki Kimura
{"title":"Experimental Study on Reinforcement Effect of Post-Installed Shear Reinforcement on a Reinforced Concrete Column","authors":"Tatsushi Yamada, Y. Takemoto, Yuuki Kimura","doi":"10.3151/crt.34.61","DOIUrl":"https://doi.org/10.3151/crt.34.61","url":null,"abstract":"","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","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":"122209383","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
Mechanical Behavior of Seismic Reinforced Joints Using Roughened Surface and Adhesive Anchors Subjected to Combined Stress 粗糙面与粘接锚杆抗震加固节点在联合应力作用下的力学行为
Concrete Research and Technology Pub Date : 1900-01-01 DOI: 10.3151/crt.33.33
Taizo Yamada, Y. Takase, T. Abe
{"title":"Mechanical Behavior of Seismic Reinforced Joints Using Roughened Surface and Adhesive Anchors Subjected to Combined Stress","authors":"Taizo Yamada, Y. Takase, T. Abe","doi":"10.3151/crt.33.33","DOIUrl":"https://doi.org/10.3151/crt.33.33","url":null,"abstract":"","PeriodicalId":303572,"journal":{"name":"Concrete Research and Technology","volume":"41 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":"121488409","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
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