摘要
在试验基础上采用"三维实体-弹簧-壳元"有限元模型对碳纤维布加固钢板进行了有限元分析,综合分析了纤维布加固钢结构过程中钢板材质、钢板厚度、碳纤维布种类等因素对破坏形态、极限承载力、粘结滑移及应变分布等性能的影响。结果表明,破坏形态大多为纤维布与钢板的剥离破坏,钢板材质、厚度对荷载-应变曲线影响较小,极限承载力随着粘结宽度的增加而明显增加,而钢板厚度及材性对极限承载力基本上没有影响。将有限元计算结果与试验结果及理论计算结果进行比较分析,分析结果与试验吻合,从而验证了有限元模型的精度及可靠性。
Based on the experiment, 3D solid-spring-shell element FE model was adopted to analyze how the factors, such as the type of CFRP, steel plate and binder, width of CFRP, thickness of steel plate, affect on the characteristics of stress distribution, the process of adhesive shear failure and damage characteristics, etc. Results show that failure modes are mostly adhesion failure, the type and thickness of steel plate have few influence on the stress distribution and ultimate bond strength, and the ultimate bond strength is increased with the increasing of the width of CFRP. Comparing simulation results with those of test and theoretical calculation, the accuracy and reliability of the model were proved.
出处
《建筑结构》
CSCD
北大核心
2010年第5期34-36,共3页
Building Structure
基金
863计划项目(2009AA032303)资助
关键词
钢结构
有限元模型
碳纤维布
数值模拟
steel structure
finite element model
CFRP
numerical simulation
