摘要
采用"壳-弹簧-壳"的有限元模型对碳纤维复材(CFRP)布加固轴压圆管柱进行有限元分析,通过有限元模拟结果与CFRP加固轴压足尺圆钢管柱的试验结果的对比分析,验证了模型的有效性。对采用不同CFRP粘贴方式的轴压圆管柱的极限承载力的分析发现:纵向粘贴CFRP对轴压圆管柱的加固效果较好,而先纵后环的粘贴方式效果相对较差。采用正交设计法分析了CFRP层数、长细比和初弯曲三个关键参数对CFRP纵向粘贴加固的轴压圆管柱的极限承载力的影响。分析结果表明:影响效果从大到小依次为CFRP层数、长细比和初弯曲,且CFRP层数与轴压圆管柱的极限承载力近似呈正比例关系,而长细比和初弯曲与轴压圆管柱的极限承载力近似呈反比例关系。
A ＂shell-spring-shell＂finite element model was established to analyse circular hollow section（CHS）columns reinforced by CFRP sheets under axial compression.The finite element model was proved to be effective by contrastive analysis between the simulated and the test results of full-scale CHS steel columns reinforced by CFRP sheets under axial load.In the analysis of the ultimate capacity of steel CHS columns with different CFRP sticking method,it was found that the reinforcement effect of CFRP on the axial compression column with longitudinal sticking of CFRP sheets paste was better than ring sticking.Orthogonal design method was used to analyse the influence on the ultimate capacity of steel CHS columns due to CFRP layer,slenderness ratio and initial flexure,it was found that the most influential factor was the CFRP layer,and then slenderness ratio,the least was initial flexure.And the CFRP layers,were approximately proportional to the ultimate capacity of the steel CHS columns under axial compression,whereas slenderness ratio and initial bending were just the opposite.
出处
《工业建筑》
CSCD
北大核心
2017年第2期33-37,共5页
Industrial Construction
基金
<钢结构加固设计规范>国家标准管理组科研资助专项课题
关键词
CFRP
圆管柱
有限元分析
正交设计法
CFRP
CHS column
finite element analysis
orthogonal design method
