CFRP加固疲劳损伤钢结构的断裂力学分析

郑云; 叶列平; 岳清瑞

doi:10.13204/j.gyjz200510024

CFRP加固疲劳损伤钢结构的断裂力学分析

doi: 10.13204/j.gyjz200510024

1.
1. 清华大学?土木工程系?北京?100084;
2.
2. 国家工业建筑诊断与改造工程技术研究中心?北京?100088

基金项目:

国家自然科学基金项目(编号:50238030);国家863项目(编号2001AA336010)资助。

详细信息

作者简介:
郑云,第一作者,男,1976年7月出生,博士研究生

中图分类号: TU391
计量
- 文章访问数: 86
- HTML全文浏览量: 13
- PDF下载量: 182
- 被引次数: 0
出版历程
- 收稿日期: 2004-12-20
- 刊出日期: 2005-10-20

FRACTURE MECHANICS ANALYSIS OF STEEL STRUCTURES WITH FATIGUE DAMAGES STRENGTHENED BY CFRP

1.
1. Department of Civil Engineering,Tsinghua University Beijing 100084;
2.
2. National Engineering Research Center for Diagnosis and Rehabilitation of Industrial Buildings Beijing 100088

摘要

摘要: 金属结构，特别是承受反复荷载作用的在役钢结构，通常存在不同程度的缺陷和疲劳损伤。在钢结构的损伤部位粘贴FRP对其疲劳损伤进行加固具有很多优势。对含中央疲劳损伤裂纹钢板粘贴CFRP加固，改善其剩余疲劳寿命进行了理论分析。基于线弹性断裂力学理论，采用有限元计算模型对裂纹前端的应力强度因子进行了计算。并根据Paris_Erdogan裂纹扩展模型，计算了加固前后疲劳损伤钢板的剩余疲劳寿命，验证了这一加固方法的有效性。
- 碳纤维板 /
- 钢结构 /
- 加固 /
- 裂纹 /
- 剩余疲劳寿命 /
- 线弹性断裂力学 /
- 应力强度因子
Abstract: There are defects and fatigue damages with different degrees in metal structures,particularly the in-service steel structures subjected to repeated loads.Many advantages can be got by gluing CFRP to the damaged positions of a steel structure.It is conducted a theoretical analysis of improving the residual fatigue life of a steel plate with central fatigue damage cracks,which is strengthened by CFRP.The stress intensity factor of the crack tip is calculated by a FEM model,based on the theory of linear elastic fracture mechanics;and the residual fatigue life of a steel plate with fatigue damages before and after strengthening is also computed according to Paris-Erdogan crack propagation model,by which the validity of the method is verfied.
- CFRP /
- steel structure /
- strengthening /
- crack /
- residual fatigue life /
- linear elastic facture mechanics /
- stress intensity factor

HTML全文

参考文献(17)

[2] Baker A A.A Summary of Work on Applications of Advanced Fibre Composites at the Aeronautical Research Laboratories.Australia:1988;

Fisher J W.钢桥的疲劳与断裂.北京:中国铁道出版社,1989;

[3] Jones R.Analysis of Bonded Repair to Damaged Fiber Composite Structures.Engineering Fracture Mechanics,1983,17(1):37～46;

[4] Atluri S N.Composite Repair of Cracked Metallic Aircraft Structures.1933;

[5] Liu X,Silva P F,Nanni A.Rehabilitation of Steel Bridge Members with FRP Composite Materials.Proc.CCC2001,Composites in Construction,Porto.Portugal:2001;

[6] Frent C Miller,Michael J Chajes,Dennis R Mertz,et al.Strengthening of a Steel Bridge Girder Using CFRP Plates.Journal of Bridge Engineering,2001,6(6):514～522;

[7] Rajan Sen,Larry Liby,Gray Mulins.Strengthening Steel Bridge Section Using CFRP Laminates.Composites:Part B,2001,32:309～322;

[8] Tavakkolizadeh M,Saadatmanesh H.Fatigue Strength of Steel Girders Strengthened with CFRP Patch.Journal of Structural Engineering,2003,129(2):186～196;

[9] Colombi P,Bassetti A,Nussbaumer A.Delamination Effects on Crascked Steel Members Reinforced by Prestressed Composite Patch.Theoretical and Applical and Applied Fracture Mechanics,2003,39:61～71;

[10] Mohammadreza Tavakkolizadeh,Hamid Saadatmanesh.Galvanic Corrosion of Carbon and Steel in Aggressive Environments.Journal of Composites for Construction,2001,5(3):200～210;

[11] Righiniotis T D,Aggelopoulos E S,Chryssanthopoulos M K.Fracture Mechanics 2D-FEA of a Cracked Steel Plate with a CFRP Patch.Proceedings of the Second International Conference.Guildford. ln:the University of Surrey,2004;

[12] Sun C T,Klug J,Arend C.Analysis of Cracked Aluminum Plates Repaired with Bonded Composite Patches.AIAA,1996,34(2):369～374;

[13] Chue C H,Chang L C,Tsai J S.Bonded Repair of a Plate with Inclined Central Crack Under Biaxial Loading.Composite Structures,1994,28(1):39～45;

[14] Dae Cheol Seo,Jung Ju Lee.Fatigue Crack Growth Behavior of Cracked Aluminum Plate Repaired with Composite Patch.Composite Structures,2002,57:323～330;

[15] 陈传尧.疲劳与断裂.武汉:华中科技大学出版社,2002;

[16] Paris P C,Erdogan F A. Critical Analysis of Crack Propagation Laws.Journal of Basic Engineering,1963,85:528～534;

[17] Ferreira J M,Pereira A H,Branco C M.Fracture Mechanics Based Fatigue Life Prediction for Welded Joints of Square Tubes.Thin-walled Structures,1995(2):107～120

施引文献

资源附件(0)

访问统计