Unified Approach for Evaluation of Shear Strength and Ultimate Deformation of Concrete Members Reinforced with Various Materials

各种材料增强混凝土构件抗剪强度和极限变形评估的统一方法

• 批准号: 12555123
• 负责人: UEDA Tamon
• 金额: $ 7.94万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555123/
• 关键词: Reinforced concrete column; Jacketing; Continuous fiber sheet; Over-laying; Shear strength; Ultimate deformation; Finite element analysis; Bond; 連続繊維シート; 鋼板

The summary of conclusions obtained by experimental and numerical analyses in this study is as follows :・The equation to predict the fracturing strength of Carbon Continuous Fiber Flexible Reinforcement (C-CFFR) at bent portion and the model to predict the transferred tensile force by C-CFFR at bent portion were proposed. Three dimensional finite element analyses, in which the proposed strength equation and the force transfer model for C-CFFR were introduced, could predict the mechanical properties of C-CFFR observed in the experiment.・It was observed that the ultimate deformation of concrete columns with Polyacetal Continuous Fiber Flexible Reinforcement (P-CFFR) as tie reinforcement was greater than that of columns with steel tie reinforcement whose volume ratio is the same. This is because P-CFFR did not fracture even at ultimate deformation and because P-CFFR can be arranged inside the core concrete. The prediction formulae for P-CFFR strains were proposed based on the experimental results.・The unified model for bond stress-slip relationship at the interface between continuous fiber sheet and concrete was proposed for finite element analysis of concrete members reinforced with continuous fiber sheet. Based on the finite element analysis of reinforced concrete prism with continuous fiber sheet subjected to uniaxial tension, it was found that the concrete tension stiffness is greater than the case without continuous fiber sheet.・In order to obtain the precise prediction of the shear tension strength of reinforced concrete members, which is necessary for finite element analysis to predict shear and ultimate deformation of concrete members reinforced with various materials, it is necessary to model precisely the force transfer along the major shear crack.

在本研究中通过实验和数值分析获得的结论摘要如下：Arboon连续的纤维柔性增强（C -CFFR）在Botion时通过C -CFR转移到cfr的张力。引入的，可以预测在实验中观察到的C-CFFR的机械性能。果实甚至在最终变形下，p-cffr可以在接口纤维纤维板上的键应力滑移关系。纤维受到单轴张力，发现混凝土张力刚度更大，没有S纤维板。 G主要的剪切裂纹。

项目成果

SIRBU Gabriel: "Finite Element Analysis of Carbon Fiber Sheets Bonded to Concrete"構造工学論文集、土木学会. Vol.47A. (2001)

SIRBU Gabriel：“粘结到混凝土上的碳纤维板的有限元分析”，日本土木工程师学会结构工程学报，第 47A 卷（2001 年）。

TADOKORO Toshiya: "The Influence of Compression Softening to the Behavior for RC Members"Proceedings of the ICCMC/IBST 2001 International Conference. 176-181 (2001)

TADOKORO Toshiya：“压缩软化对 RC 成员行为的影响”ICCMC/IB​​ST 2001 年国际会议记录。

田所 敏弥: "斜めひび割れ面のせん断伝達機構と鉄筋コンクリート棒部材の斜め引張破壊"土木学会論文集. (2003)

Toshiya Tadokoro：“钢筋混凝土杆件的对角裂缝表面和对角拉伸破坏的剪切传递机制”日本土木工程师学会会刊（2003）。

Tamon Ueda: "New Approach for Usage of Continuous Fiber as Non-Metallic Reinforcement of Concrete"Structural Engineering International, IABSE. Vol.12,Nr.2. 111-116 (2002)

Tamon Ueda：“使用连续纤维作为混凝土非金属增强材料的新方法”国际结构工程，IABSE。

Roshan Tuladhar: "A SIMPLE CONTINUOUS SYSTEM OF SHEAR REINFORCEMENT WITH POLYACETAL FIBER"Proceedings of FRPRCS-6. (印刷中). (2003)

Roshan Tuladhar：“聚缩醛纤维剪切增强的简单连续系统”FRPRCS-6 论文集（2003 年）。