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.

为了实现对真实的混凝土结构的多尺度集成分析，对分析平台进行了扩展。该分析平台成功地再现了预应力混凝土高架桥的过大挠度。分析结果表明，钢约束引起的体积变化和上下翼缘的热动力状态的差异是导致大挠度的关键。在此基础上，提出了在上、下翼缘采用不同的混凝土性能来控制时变挠度的设计思路，并验证了其有效性。该系统还模拟了结构性能随腐蚀的变化。结果表明，由于失效模式随恶化而转变，结构性能随时间的退化比预期的要快。

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

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 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

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