Evaluation of failure mechanism and size effect of confined concrete under axial compression using mesoscopic mechanical modeling

使用细观力学模型评估轴压约束混凝土的破坏机制和尺寸效应

• 批准号: 22760352
• 负责人: YAMAMOTO Yoshihito
• 金额: $ 2.25万
• 依托单位: 防衛大学校
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760352/
• 关键词: 拘束コンクリート; メゾスケール; 剛体バネモデル; 圧縮軟化; 局所化; 寸法依存性; 圧縮軟化・局所化

A coupled RBSM(Rigid-Body-Spring Model)-FEM model has been developed for evaluation of failure mechanism of confined concrete under uniaxial compression. In the proposed model, the RBSM is applied meso-scale constitutive models, and the steel reinforcing material for lateral confinement is modeled by a series of beam and shell elements. By comparing numerical results with the empirical formulas or the experimental results, it is confirmed that the proposed model can reasonably evaluate the compression response of confined concrete specimens. In addition, a parametric study of the influence of specimen size was conducted with the proposed model in order to discuss the mechanism of the size dependence.

建立了约束混凝土单轴受压破坏机理的RBSM-FEM耦合模型。在该模型中，RBSM应用细观本构模型，和钢筋横向约束材料的模拟由一系列的梁和壳单元。将计算结果与经验公式或试验结果进行比较，验证了该模型能够合理地评价约束混凝土试件的受压响应。此外，为了讨论尺寸依赖性的机制，与所提出的模型进行了参数化研究的试样尺寸的影响。

项目成果

ANALYSIS OF COMPRESSION FAILURE OF CONCRETE BY THREE DIMENSIONAL RIGID BODY SPRING MODEL

• DOI: 10.2208/jsceje.64.612
• 发表时间: 2008
• 期刊: Doboku Gakkai Ronbunshuu E
• 作者: Yoshihito Yamamoto;Hikaru Nakamura;I. Kuroda;N. Furuya

3次元RBSMによる横拘束コンクリートの1軸圧縮破壊解析

使用 3D RBSM 进行横向约束混凝土的单轴压缩破坏分析

• 发表时间: 2010
• 期刊: 土木学会論文集E
• 作者: 山本佳士;中村光;黒田一郎;古屋信明
• 通讯作者: 古屋信明

Effect of Stirrups on the Shear Failure Mechanism of Deep Beams

• DOI: 10.3151/jact.10.14
• 发表时间: 2012-01-01
• 期刊: JOURNAL OF ADVANCED CONCRETE TECHNOLOGY
• 影响因子: 2
• 作者: Gedik, Yasar Hanifi;Nakamura, Hikaru;Kunieda, Minoru
• 通讯作者: Kunieda, Minoru