Enhancement of multi-scale integrated analysis for real concrete structure

增强真实混凝土结构的多尺度综合分析

• 批准号: 22760327
• 负责人: CHIJIWA Nobuhiro
• 金额: $ 2.83万
• 依托单位: The University of Tokyo
• 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-22760327/
• 关键词: クリープ; 実構造物; 材料構造連成解析; 構造性能; 劣化

In order to simulate real concrete structures in full scale by the multi-scale integrated analysis, the analytical platform is enhanced. The excessive deflection of PC viaducts are reproduced successfully by this analytical platform. The analytical results show that the difference of time-dependent volumetric change caused by steel confinement and thermo-dynamical state between upper and bottom flange is the key of excessive deflection. Based on this fact, new design concept that giving different concrete property between upper and bottom flange to control the time dependent deflection is proposed, and its validity is confirmed. The change of structural performance with corrosion is also simulated by the system. The result shows that the degradation of structural performance with time is faster than expected because of the failure mode shift with deterioration.

为了通过多尺度集成分析对真实的混凝土结构进行全面模拟，分析平台得到了增强。 PC高架桥的过度挠度通过此分析平台成功地复制。分析结果表明，钢限制和底部法兰之间的热动力状态引起的时间依赖性体积变化的差异是过度偏转的关键。基于这个事实，提出了在上法兰和底部法兰之间赋予不同混凝土特性以控制时间依赖性偏转的新设计概念，并确认了其有效性。系统还模拟了结构性能随​​腐蚀的变化。结果表明，由于失败模式随着恶化的变化，随时间的结构性能降解比预期的要快。

项目成果

Simulation of long-termtime-dependent mechanics of anexisting PC bridge by full-3Dmulti-scale integrated FE analysis,

通过全 3D 多尺度集成 FE 分析模拟现有 PC 桥的长期瞬态力学，

• 发表时间: 2010
• 作者: Kei Sugita;Nobuhiro Chijiwa;KoichiMaekawa
• 通讯作者: KoichiMaekawa

Simulation of long-term time-dependent mechanics of an existing PC bridge by full-3D multi-scale

通过全 3D 多尺度模拟现有 PC 桥的长期瞬态力学

• 发表时间: 2010
• 作者: Nobuhiro Chijiwa;Kei Sugita;Tetsuya Ishida;Koichi Maekawa
• 通讯作者: Koichi Maekawa

Feasibility study of autonomous deformation control of PC viaducts

PC高架桥变形自主控制可行性研究

• 发表时间: 2012
• 作者: M.Kunieda;N.Chijiwa;K.Ohara and K.Maekawa
• 通讯作者: K.Ohara and K.Maekawa

Simulation of long-term time-dependent mechanics of an existing PC bridee by full-3D multi-scale integrated FE analysis

通过全 3D 多尺度集成 FE 分析模拟现有 PC 新娘的长期瞬态力学

• 发表时间: 2010
• 作者: Kei Sugita;Nobuhiro Chijiwa;Koichi Maekawa
• 通讯作者: Koichi Maekawa

Simulation of long-term time-dependent mechanics of an existing PC bridge by full-3D multi-scale integrated FE analysis

通过全 3D 多尺度集成 FE 分析模拟现有 PC 桥的长期瞬态力学

• 发表时间: 2010
• 作者: Nobuhiro Chijiwa;Kei Sugita;Tetsuya Ishida;Koichi Maekawa
• 通讯作者: Koichi Maekawa