The effects of cyclic loading protocols on the structural performance of rectangular hollow-section members, such as the ultimate resistance determined by local buckling and the degradation behavior, are clarified through structural tests and elasto-plastic numerical analyses based on the finite element method. The material constants of the Chaboche model and the subloading surface model were identified using cyclic coupon tests to simulate the structural tests by the finite element method, and the analysis of rectangular hollow-section members subjected to bending shear was performed. Finally, evaluation formulae for the structural performance are proposed based on parametric numerical analyses.
{"title":"EFFECT OF LOADING PROTOCOL ON DETERIORATING BEHAVIOR DUE TO LOCAL BUCKLING OF BOX-SECTION STEEL MEMBERS","authors":"Kazuya MITSUI, Itsuki MATSUMOTO, Kikuo IKARASHI","doi":"10.3130/aijs.88.1569","DOIUrl":"https://doi.org/10.3130/aijs.88.1569","url":null,"abstract":"The effects of cyclic loading protocols on the structural performance of rectangular hollow-section members, such as the ultimate resistance determined by local buckling and the degradation behavior, are clarified through structural tests and elasto-plastic numerical analyses based on the finite element method. The material constants of the Chaboche model and the subloading surface model were identified using cyclic coupon tests to simulate the structural tests by the finite element method, and the analysis of rectangular hollow-section members subjected to bending shear was performed. Finally, evaluation formulae for the structural performance are proposed based on parametric numerical analyses.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135162305","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}
This study summarizes the results of horizontal two-dimensional and horizontal one-dimensional loading experiments using Dougou of Demitsudo-gumi and Hiramitsudo-gumi while applying a vertical load of 20kN to Dougou. The findings obtained are as follows.
{"title":"GRASPING THE TWO HORIZONTAL BEHAVIOR OF DOU-GONG BY DEMITSUDO-GUMI AND HIRAMITSUDO-GUMI","authors":"Yuya TAKAIWA","doi":"10.3130/aijs.88.1535","DOIUrl":"https://doi.org/10.3130/aijs.88.1535","url":null,"abstract":"This study summarizes the results of horizontal two-dimensional and horizontal one-dimensional loading experiments using Dougou of Demitsudo-gumi and Hiramitsudo-gumi while applying a vertical load of 20kN to Dougou. The findings obtained are as follows.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161113","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}
In general, long-term creep deformation and other factors affect the structural properties of arches and shells with large spans and low rises, but there is little information available. Existing structural design guides make assumptions based on limited information. In this study, we tracked the deformation of the large shell of the actual machine for 10 years from the time of construction, and identified the expansion, contraction, long-term creep, temperature deformation, and vibration characteristics immediately after placing concrete by measurement and numerical analysis. We will report on a case where we tried to comprehensively analyze the effects on the structural characteristics.
{"title":"扁平な大型RCシェルの長期性状と構造特性に関する実証的検討","authors":"Atsushi MUTOH, Hirotoshi KOMATSU, Mutsuro SASAKI","doi":"10.3130/aijs.88.1525","DOIUrl":"https://doi.org/10.3130/aijs.88.1525","url":null,"abstract":"In general, long-term creep deformation and other factors affect the structural properties of arches and shells with large spans and low rises, but there is little information available. Existing structural design guides make assumptions based on limited information. In this study, we tracked the deformation of the large shell of the actual machine for 10 years from the time of construction, and identified the expansion, contraction, long-term creep, temperature deformation, and vibration characteristics immediately after placing concrete by measurement and numerical analysis. We will report on a case where we tried to comprehensively analyze the effects on the structural characteristics.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161882","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}
This paper proposes a design method for M-CK type tuned dynamic mass system considering viscous damping or hysteretic damping of base isolation structure. First, based on the fixed-point theory, the optimal design equation for an M-CK-type tuning system is presented, considering of the viscous damping of the structure. Next, we validate the proposed design method through simulation analysis. Finally, the proposed design method is proved by vibration experiments.
{"title":"免震構造における免震層の減衰性能を考慮したM-CK型D.M.同調システムに関する研究","authors":"Nobuhiro AKUTO, Ippei HATA, Ryota MOTONISHI, Chunhuan KUO, Naoki YAMASHITA","doi":"10.3130/aijs.88.1513","DOIUrl":"https://doi.org/10.3130/aijs.88.1513","url":null,"abstract":"This paper proposes a design method for M-CK type tuned dynamic mass system considering viscous damping or hysteretic damping of base isolation structure. First, based on the fixed-point theory, the optimal design equation for an M-CK-type tuning system is presented, considering of the viscous damping of the structure. Next, we validate the proposed design method through simulation analysis. Finally, the proposed design method is proved by vibration experiments.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135162056","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}
For steel framed buildings with an eave height of 9m or less and beam span of 13m or less, bolt joints are permitted to connect the main structural members. This paper describes the effect of slip in bolt joint on the story drift angle of the frame, based on static loading tests and seismic response analysis of full-scale braced frames. Experimental results confirmed that the amount of increase in story drift angle can be evaluated according to the clearance of the bolt hole.
{"title":"STRUCTURAL BEHAVIOR OF BRACED FRAME WITH SLIP OF NORMAL BOLT JOINTS","authors":"Keisuke HIRAMOTO, Miku KUROSAWA, Nobuhiko TATSUMI, Shoichi KISHIKI, Takashi HASEGAWA","doi":"10.3130/aijs.88.1581","DOIUrl":"https://doi.org/10.3130/aijs.88.1581","url":null,"abstract":"For steel framed buildings with an eave height of 9m or less and beam span of 13m or less, bolt joints are permitted to connect the main structural members. This paper describes the effect of slip in bolt joint on the story drift angle of the frame, based on static loading tests and seismic response analysis of full-scale braced frames. Experimental results confirmed that the amount of increase in story drift angle can be evaluated according to the clearance of the bolt hole.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161716","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}
Ayumu YASUE, Junho KIM, Yuhei NISHIO, Manabu KANEMATSU, Tetsuro MATSUSHITA, Toshinobu MAENAKA, Tsuguyoshi SUZUKI, Hayate HIGANO
The moisture content of concrete affects the ultrasonic pulse velocity and compressive strength. This effect adversely affects the estimation of the concrete compressive strength by ultrasonic testing. Therefore, this study conducted ultrasonic and compressive tests on dry concrete specimens. By applying the measured experimental results, this study proposed an estimation equation for concrete compressive strength that considers the effect of the moisture content. The proposed equation can estimate the compressive strength of dried concrete, concrete that has been dried and underwater curing again, and concrete that ha s been cured under standard curing conditions with an accuracy of about ±20%.
{"title":"超音波法による含水状態の異なるコンクリートの圧縮強度推定","authors":"Ayumu YASUE, Junho KIM, Yuhei NISHIO, Manabu KANEMATSU, Tetsuro MATSUSHITA, Toshinobu MAENAKA, Tsuguyoshi SUZUKI, Hayate HIGANO","doi":"10.3130/aijs.88.1491","DOIUrl":"https://doi.org/10.3130/aijs.88.1491","url":null,"abstract":"The moisture content of concrete affects the ultrasonic pulse velocity and compressive strength. This effect adversely affects the estimation of the concrete compressive strength by ultrasonic testing. Therefore, this study conducted ultrasonic and compressive tests on dry concrete specimens. By applying the measured experimental results, this study proposed an estimation equation for concrete compressive strength that considers the effect of the moisture content. The proposed equation can estimate the compressive strength of dried concrete, concrete that has been dried and underwater curing again, and concrete that ha s been cured under standard curing conditions with an accuracy of about ±20%.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161719","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}
This paper presents prediction methods of moment-rotation relationships around strong axis of buckling H-Shaped beams subjected to a moment at one end. This paper studies the behaviors of the beams in two cases of boundary condition. In the one case, both ends are not restraint to rotate laterally and to warp. In the other case, the only loading end is restraint to rotate laterally and to warp. In order to improve the accuracy of the methods over various cross sections and spans, this paper checks that the lateral deformation and twist angle can be predicted accurately.
{"title":"横座屈により耐力が決定する一端曲げH形鋼梁の荷重変形関係の予測方法","authors":"Hiroshi MATSUBARA, Kikuo IKARASHI","doi":"10.3130/aijs.88.1557","DOIUrl":"https://doi.org/10.3130/aijs.88.1557","url":null,"abstract":"This paper presents prediction methods of moment-rotation relationships around strong axis of buckling H-Shaped beams subjected to a moment at one end. This paper studies the behaviors of the beams in two cases of boundary condition. In the one case, both ends are not restraint to rotate laterally and to warp. In the other case, the only loading end is restraint to rotate laterally and to warp. In order to improve the accuracy of the methods over various cross sections and spans, this paper checks that the lateral deformation and twist angle can be predicted accurately.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161106","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}
We focused on the regionality of crustal thickness and examined the differences in the scaling relationship between the seismic moment and rupture area for crustal earthquakes. We found good agreement between the scaling relationships and earthquake data when the saturated rupture width and stress drop was set to 16 km and 3.1 MPa, respectively, in regions with a relatively thin crust, including Japan, and set to 28 km and 2.0 MPa, respectively, in regions with a relatively thick crust. For crustal earthquakes, the accuracy of the scaling relationship is improved by considering the crustal thickness.
{"title":"A STUDY OF SOURCE SCALING RELATIONSHIPS OF CRUSTAL EARTHQUAKES IN THE WORLD CONSIDERING REGIONAL CLASSIFICATION BY CRUSTAL THICKNESS","authors":"Akihiro SHIMMURA, Kazuhito HIKIMA","doi":"10.3130/aijs.88.1502","DOIUrl":"https://doi.org/10.3130/aijs.88.1502","url":null,"abstract":"We focused on the regionality of crustal thickness and examined the differences in the scaling relationship between the seismic moment and rupture area for crustal earthquakes. We found good agreement between the scaling relationships and earthquake data when the saturated rupture width and stress drop was set to 16 km and 3.1 MPa, respectively, in regions with a relatively thin crust, including Japan, and set to 28 km and 2.0 MPa, respectively, in regions with a relatively thick crust. For crustal earthquakes, the accuracy of the scaling relationship is improved by considering the crustal thickness.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161231","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}
The objective of this study is to propose the new design formula for ultimate strength and allowable strength of slender concrete filled square steel tubular columns subjected to axial force and bending moment. This new formula is based on the full plastic strength, and has no slenderness classification between short, medium, and slender columns which is used in the current CFT recommendations. The proposed ultimate strength agreed very well to the analytical results whose parameters are material strengths, moment gradient ratio, column length - depth ratio and corresponded to the previous experimental results.
{"title":"STRENGTH OF CONCRETE-FILLED SQUARE STEEL TUBULAR BEAM-COLUMNS SUBJECTED TO AXIAL FORCE AND BENDING MOMENT","authors":"Masae KIDO, Takashi Fujinaga, Keigo TSUDA","doi":"10.3130/aijs.88.1590","DOIUrl":"https://doi.org/10.3130/aijs.88.1590","url":null,"abstract":"The objective of this study is to propose the new design formula for ultimate strength and allowable strength of slender concrete filled square steel tubular columns subjected to axial force and bending moment. This new formula is based on the full plastic strength, and has no slenderness classification between short, medium, and slender columns which is used in the current CFT recommendations. The proposed ultimate strength agreed very well to the analytical results whose parameters are material strengths, moment gradient ratio, column length - depth ratio and corresponded to the previous experimental results.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161240","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}
Concrete short-span beams might suffer bond splitting failure during a large earthquake due to their short development length. Steel Fiber-Reinforced Concrete is known to be effective in enhancing the performance of concrete members. However, there are not many studies on bond splitting failure of Steel Fiber-Reinforced Concrete members. Therefore, we carried out bond splitting tests of Steel Fiber-Reinforced Concrete assuming corner and side split type failures. We proposed an evaluation method for bond splitting strength considering their material properties. In addition, the evaluation method was verified using the results of tests of short-span Steel Fiber-Reinforced Concrete beams.
{"title":"鋼繊維補強コンクリートを用いた短スパン梁の付着割裂性状","authors":"Tomoya TAKAHASHI, Masahiro OGO, Tomoaki SUGIYAMA, Akitsugu MURAMATSU, Shinichiro KAWAMOTO, Hideyoshi WATANABE, Kuniyoshi SUGIMOTO","doi":"10.3130/aijs.88.1545","DOIUrl":"https://doi.org/10.3130/aijs.88.1545","url":null,"abstract":"Concrete short-span beams might suffer bond splitting failure during a large earthquake due to their short development length. Steel Fiber-Reinforced Concrete is known to be effective in enhancing the performance of concrete members. However, there are not many studies on bond splitting failure of Steel Fiber-Reinforced Concrete members. Therefore, we carried out bond splitting tests of Steel Fiber-Reinforced Concrete assuming corner and side split type failures. We proposed an evaluation method for bond splitting strength considering their material properties. In addition, the evaluation method was verified using the results of tests of short-span Steel Fiber-Reinforced Concrete beams.","PeriodicalId":38967,"journal":{"name":"Journal of Structural and Construction Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135161700","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}
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