Fracture Behavior of RC Members Subjected to Torsion-Bending Shear Using the Acoustic Emission Method

使用声发射法研究钢筋混凝土构件在扭弯剪作用下的断裂行为

• 批准号: 24860066
• 负责人: KAWASAKI Yuma
• 金额: $ 1.91万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Research Activity Start-up
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-08-31 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24860066/
• 关键词: AE法; 地震; RC部材; 複合断面力; ひび割れ位置標定; ねじり; 破壊進展; ねじりモーメント; 組合せ断面力; アコースティック・エミッション法; 補修・補強; 鉄筋コンクリート

When the RC members were loaded by torsion-bending shear (composite sectional force), local cracks were found on one side while minor cracks were found on the opposite side. Also, if the RC members received composite sectional force, it is possible that the RC member would rapidly be broken. Therefore, the AE (acoustic emission) method was used to clarify the internal fracture behavior, internal fracture energy, and locations of cracking in RC members. For internal fractures in RC members loaded by pure torsion, the fractures progressed only in the outer circumference of the cross section until the web reinforcement yielded. Moreover, the pure torsion fracture and the bending shear fracture were the primary factors in controlling the internal fractures of RC members loaded by composite sectional force, before they reached one-third of the maximum strength.

受扭弯剪力（复合截面力）作用时，一侧出现局部裂缝，另一侧出现较小裂缝。此外，如果钢筋混凝土构件受到复合截面力，钢筋混凝土构件可能会迅速断裂。因此，采用AE（声发射）方法来阐明RC构件的内部断裂行为、内部断裂能和开裂位置。在纯扭转荷载作用下，钢筋混凝土构件的内部裂缝只在截面的外周进行，直到腹板钢筋屈服。纯扭转断裂和弯剪断裂是控制复合截面力作用下钢筋混凝土构件内部断裂的主要因素，在达到最大强度的1 / 3之前。

项目成果

Fracture Mechanism of RC Members subjected to Torsion-Bending-Shear by Acoustic Emission

声发射扭弯剪作用下钢筋混凝土构件断裂机理

• 发表时间: 2013
• 作者: Yu Ogawa;Yuma Kawasaki and Takahisa Okamoto
• 通讯作者: Yuma Kawasaki and Takahisa Okamoto

曲げ・せん断にねじりが同時に作用するRC部材の耐荷機構

弯、剪、扭同时作用的RC构件的承载机理

• 发表时间: 2013
• 期刊: コンクリート工学年次論文集
• 作者: 勝山由佳子;焦瑜;河野守;小川悠・加藤慎介・川崎佑磨・岡本享久
• 通讯作者: 小川悠・加藤慎介・川崎佑磨・岡本享久

Fracture Behavior of RC Members Subjected to Torsion-Bending Shear Using the Acoustic Emission Method

使用声发射法研究钢筋混凝土构件在扭弯剪作用下的断裂行为

• 发表时间: 2014
• 期刊: J. of Construction and Building Materials
• 作者: Yu Ogawa;Yuma Kawasaki and Takahisa Okamoto
• 通讯作者: Yuma Kawasaki and Takahisa Okamoto