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.

本研究的目的是开发一个分析系统，可以预测混凝土结构在各种荷载和环境作用下的性能。主要研究成果如下：1）编制了氯盐侵蚀下钢筋混凝土桥梁性能时变数值模拟程序。2）对上述计算系统中的材料模型进行了改进，改进后的材料模型为开裂混凝土中的材料输运模型，混凝土中钢筋的锈蚀模型和锈蚀钢筋混凝土构件的受拉刚化模型开发了能模拟不同类型钢筋混凝土结构峰后性能的三维非线性有限元程序。4）研制了裂缝混凝土气体渗透性试验装置。5）改进了混凝土的本构模型，以保证混凝土结构在各种条件下的损伤分析。建立了平面混凝土在反复拉压应力作用下的本构模型。建立了冻融作用下平面混凝土的本构模型。建立了静载和循环荷载作用下碳纤维布与混凝土粘结性能的本构模型。

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)。

藤本将行 他: "水中におけるコンクリートの圧縮疲労性状に関する一考察"コンクリート工学年次論文集. Vol.22,No.3. 205-210 (2000)

Masayuki Fujimoto 等人：“混凝土在水中的压缩疲劳性能研究”混凝土工程年刊第 22 卷，第 3 期（2000 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）。

T.Shimomura: "Service Life Prediction of Concrete Structures Subjected to Chloride Attack by Numerical Simulation"Life Prediction and Aging Management of Concrete Structures-edited by D.Naus, RILEM Proceedigs PRO 16. 25-34 (2000)

T.Shimomura：“通过数值模拟预测受氯离子侵蚀的混凝土结构的使用寿命”混凝土结构的寿命预测和老化管理-D.Naus 编辑，RILEM Proceedigs PRO 16. 25-34 (2000)

Takafumi SUGIYAMA: "Change of the Transport Number of Chloride Ions in a Migration Test for Concrete"Proceeding of the 2nd International RILEM Workshop on Testing and Modeling the Chloride Ingress into Concrete. (Contained in the CD-ROM). (2000)

Takafumi SUGIYAMA：“混凝土迁移测试中氯离子传输数的变化”第二届国际 RILEM 氯离子进入混凝土测试和建模研讨会论文集。