FRP加固钢梁胶层界面的断裂力学分析  

FRACTURE ANALYSIS OF THE INTERFACE BETWEEN STEEL AND FRP PLATE FOR THE STEEL BEAMS REINFORCED WITH FRP PLATE

作　　者：郑云[1] 叶列平[2] 岳清瑞[1] 惠云玲[1] 

机构地区：[1]中冶集团建筑研究总院,北京100088 [2]清华大学土木系,北京100084

出　　处：《工业建筑》2008年第11期106-108,共3页Industrial Construction

基　　金：国家自然科学基金重点项目(50238030);国家863项目(2001AA336010)

摘　　要：疲劳试验研究表明,FRP加固钢梁可以大大改善钢结构的疲劳寿命,但FRP端部胶层界面容易发生脱胶,影响加固效果。采用断裂力学分析方法,应用分析模型、简化分析模型和有限元方法得到胶层界面裂纹扩展过程的能量释放率G,提出避免FRP端部发生胶层界面破坏的措施。Fatigue experimental results indicate that the fatigue life of steel structures reinforced with FRP is obviously increased as compared to steel members un-repaired, but the interface at the end of FRP often delaminates between FRP and steel beams. Analysis and simplified analysis models, finite element method are applied to calculate the energy release rate based on the fracture mechanics method, and the measures to prevent the interface from delarairiating are put forward.

关 键 词：FRP 胶层界面 断裂力学 能量释放率 

分 类 号：TU391[建筑科学—结构工程]