コンクリート中の鉄筋加工部の脆性破断に関する実験的研究

Persistent ID (NDL): info:ndljp/pid/11337571

Material type: 博士論文

Author: 山中, 憲行ほか

Publisher: -

Publication date: 2016-10-01

Material Format: Digital

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Name of awarding university/degree: 前橋工科大学,博士（工学）

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Note (General)：: The purpose of this study is to investigate the reasons behind the fracturing of bending part of rebars in ASR concrete, and also to determine the cha...

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Material Type: 博士論文
Title: コンクリート中の鉄筋加工部の脆性破断に関する実験的研究
Author/Editor: 山中, 憲行
ヤマナカ, ノリユキ
Yamanaka, Noriyuki
Publication Date: 2016-10-01
Publication Date (W3CDTF): 2016-10-01
Alternative Title: Experimental Study on Brittle Fracture of Processing Parts of Rebars in Concrete
Degree grantor/type: 前橋工科大学
Date Granted: 2016-03-25
Date Granted (W3CDTF): 2016-03-25
Dissertation Number: 乙第3号
Degree Type: 博士（工学）
Conferring No. (Dissertation): 乙第3号
Text Language Code: jpn
Subject Heading: 曲げ加工部
圧接加工部
鉄筋
アルカリ骨材反応
疲労
Bending parts
Pressure-welding parts
Rebar
ASR
Fatigue
Note (General): The purpose of this study is to investigate the reasons behind the fracturing of bending part of rebars in ASR concrete, and also to determine the characteristics of the fatigue cycle of pressure-welded rebars in concrete. The results of this study show that: (1) The fracturing of rebars subjected to expansion loads in ASR concrete can be attributed to cracks forming in rebars as a result of bending. The rebars are unlikely to fail provided that they are not notched and that the bending radius is at least twice their diameter. (2) Carbonate stress corrosion cracking (CSCC) of rebars in ASR concrete is likely to occur if the concentration of the carbonate around bending part of rebars is in the range 1.5 mol/L–2.0 mol/L. The cracks of CSCC occurred in a rebar consist of both transgranular and intergranular cracks. The cracks of CSCC were identical to those of rebars failed in the ASR concrete of actual structures. (3) The fatigue life of pressure-welded rebars in concrete is 1.8 to 4.0 times greater than that of pressure-welded bars in air. The longer fatigue life is a result of the bond stress between rebar and concrete.
学位記番号:工博乙3
identifier:https://gair.media.gunma-u.ac.jp/dspace/handle/10087/10310
Persistent ID (NDL): info:ndljp/pid/11337571
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Collection: 障害者向け資料
Collection (Materials For Handicapped People:1): テキストデータ
Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
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Acquisition Basis: 博士論文（自動収集）
Date Accepted (W3CDTF): 2019-08-03T12:23:27+09:00
Format (IMT): application/pdf
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Periodical Title (URI): http://hdl.handle.net/10087/10310
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