Development of Analytical System for Damage and Deterioration of Concrete Structures

混凝土结构损伤和劣化分析系统的开发

• 批准号: 11555117
• 负责人: SHIMOMURA Takumi
• 金额: $ 8.77万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555117/
• 关键词: corrosion of steel; damage analysis; dynamic nonlinear FE analysis; crack; material transport; gas permeability; freeze-thaw; cyclic load; 動的非線形有限要素法; ポストピーク; 蓄積エネルギー; 塩化物イオン拡散係数; ガス透過性; 鉄筋腐食

The objective of this research project is to develop an analytical system that can predict performance of concrete structures subjected to various load and environmental actions. Following results were obtained.1) A computer program for numerical simulation of time-dependent performance change of RC bridges subjected to chloride attack was developed. It can predict effectiveness of some rehabilitation techniques as desalination method and retrofitting of CF sheet on service life of structures.2) Material models in the computational system mentioned above were improved, which are material transport models in cracked concrete, corrosion model of reinforcing bar in concrete and tension stiffening model for corroded RC members.3) 3D nonlinear FEM program that can simulate post peak behavior of various types of RC structures was developed.4) A testing apparatus to examine gas permeability in cracked concrete was developed. Using this apparatus, resistance of damaged concrete against ingress of aggressive agent was investigated.5) Constitutive models for concrete were improved to ensure a damage analysis of concrete structures under various conditions. A constitutive model for plane concrete under cyclic tensile and compressive stress was formulated. A constitutive model for plane concrete damaged by freeze-thaw action was formulated. A constitutive model for bonding behavior of CF sheet and concrete under static and cyclic load was formulated.

该研究项目的目标是开发一种分析系统，可以预测混凝土结构在各种载荷和环境作用下的性能。获得了以下结果：1)开发了对氯化物侵蚀下RC桥梁性能随时间变化进行数值模拟的计算机程序。可以预测海水淡化、碳纤维板加固等修复技术对结构使用寿命的影响。2)改进了上述计算系统中的材料模型，包括开裂混凝土中的材料传输模型、混凝土中钢筋的腐蚀模型等。腐蚀RC构件的混凝土和拉伸硬化模型。3）开发了可以模拟各种类型RC结构峰值后行为的3D非线性FEM程序。4）开发了一种检测裂缝混凝土透气性的测试装置。使用该装置，研究了受损混凝土对侵蚀剂侵入的抵抗力。5）改进了混凝土本构模型，以确保对各种条件下混凝土结构的损伤进行分析。建立了循环拉压应力下平面混凝土的本构模型。建立了冻融作用下平面混凝土损伤的本构模型。建立了静载和循环荷载下CF板与混凝土粘结行为的本构模型。

项目成果

T.Shimomura: "Experimental and Analytical Approach to Evaluation of Residual Performance of RC Structures Deteriorated by Chloride Attack"Proceedings of the International Symposium on Integrated Life-Cycle design of Materials and Structures (ILCDES 2000).

T.Shimomura：“评估氯化物侵蚀恶化的 RC 结构剩余性能的实验和分析方法”材料和结构综合生命周期设计国际研讨会论文集 (ILCDES 2000)。

T. Shimomura: "Lifespan simulation of concrete structures"Journal of the JSCE. Vol. 86, No. 12. 47-50 (2001)

T. Shimomura：“混凝土结构的寿命模拟”JSCE 杂志。

五十嵐 智美: "フライアッシュを混和したモルタルの塩化物イオン濃度と全塩分量との関係"第27回土木学会関東支部技術研究発表会. (2000)

Tomomi Igarashi：“掺有粉煤灰的砂浆中氯离子浓度与总盐含量的关系”第27届日本土木学会关东分会技术研究报告（2000年）。

松尾 洋: "鉄筋が腐食した鉄筋コンクリート部材の引張剛性"コンクリート工学年次論文集. 23・3. 1327-1332 (2001)

Hiroshi Matsuo：“钢筋混凝土构件的拉伸刚度”混凝土工程年报 23・3（2001 年）。

清水俊吾,杉山隆文,辻幸和,Supratic Gupta: "モルタル中を電気的泳動する塩化物イオンの濃度分布"コンクリート工学年次論文集. Vol.22,No.1. 115-120 (2000)

Shungo Shimizu、Takafumi Sugiyama、Yukikazu Tsuji、Supratic Gupta：“砂浆中氯离子电泳的浓度分布”，混凝土工程年报，第 22 卷，第 115-120 期（2000 年）。