Estimation method of shear capacity in reinforced concrete member deteriorated by reinforcing steel corrosion

钢筋锈蚀引起的钢筋混凝土构件抗剪承载力估算方法

• 批准号: 19760303
• 负责人: YAMAMOTO Takashi
• 金额: $ 2.43万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19760303/
• 关键词: 鉄筋コンクリート; 鉄筋腐食; せん断耐荷性能; せん断耐荷力算定式; 斜め引張破壊; アーチ耐荷機構; コンクリート負担せん断耐力; 付着性能; 圧縮主筋; 横拘束筋; 電食; 主筋; せん断補強筋; コンクリート負担せん断力

A load carrying capacity, especially the shear capacity, should be examined in a deteriorated RC member. In this study, the influence of corrosion of reinforcements on shear behavior of RC beams was investigated. As a result, when a diagonal shear crack occurred in RC beam deteriorated by shear reinforcements corrosion, the shear capacity was likely to decrease. However, when the bond characteristic between concrete and longitudinal reinforcement was degraded by corrosion, the diagonal shear crack was hard to occur. In consequence, the load carrying capacity was increased by the formation of arch action mechanism.

应对劣化钢筋混凝土构件进行承载能力，特别是抗剪能力的检测。本文研究了钢筋腐蚀对钢筋混凝土梁抗剪性能的影响。因此，当钢筋锈蚀变质的钢筋混凝土梁出现斜向剪切裂缝时，其抗剪能力有可能降低。而当混凝土与纵向钢筋之间的粘结特性因腐蚀而退化时，则很难发生斜剪裂缝。因此，拱作用机制的形成提高了承载能力。

项目成果

RCはりのせん断耐荷挙動に与える鉄筋腐食の影響

钢筋锈蚀对RC梁剪力承载性能的影响

• 发表时间: 2009
• 期刊: セメント技術大会講演要旨 Vol.63
• 作者: 山本貴士;宮川豊章
• 通讯作者: 宮川豊章