碳纤维布加固高强混凝土偏心受压柱受力性能的有限元分析  

Finite Element Analysis on Mechanical Performance of High-Strength Concrete Column Confined with Carbon Fiber-Reinforced under Eccentric Load

作　　者：王吉忠[1] 王苏岩[1] 张海军[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《沈阳建筑大学学报（自然科学版）》2009年第3期442-450,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(50378011)

摘　　要：目的研究碳纤维布加固高强混凝土偏心受压柱的受力性能,并建立其有限元模型.方法通过不同加固形式的18根试件,对碳纤维布加固高强混凝土偏心受压矩形柱的力学性能进行了有限元分析,主要考虑了偏心距、预损伤程度、纤维布的数量以及粘贴形式对加固效果的影响.结果给出了柱的荷载挠度曲线、混凝土轴向应力的分布情况、纤维布应力的分布情况等.结论不论是纤维布条带包裹,还是完全包裹的试件,加固后高强混凝土柱的极限承载力都有一定的提高,有限元分析结果和试验结果吻合较好,可以为实际工程加固柱的模拟提供参考.In order to study the mechanical performances of high strength concrete columns under eccentric load strengthed by CFRP, finite element analysis model is established. Finite Element Analysis on the mechanical performances of high strength concrete columns under eccentric load strengthed by CFRP is carded out through eighteen members with different strengthening schemes. Several factors are taken into account, such as design parameters, eccentricity ratio, loading history, quantity of carbon fiber reinforcement and space of straps. Based on the finite element analysis,the change of load-flexivity curve,distribution of axial stress of concrete and distribution of carbon fiber-reinforced are given, together with some conclusions being drawn as follows. Ultimate bearing capacity of high strength concrete columns externally bonded with CFRP has increased to a certain extent whether they are bonded with CFRP strips or sheets. The results of finite element analysis are corresponding well with the experimental results. It is suitable for the imitation of practical engineering on columns retrofit with CFRP.

关 键 词：偏心受压 碳纤维布 承载力 有限元 

分 类 号：TU375.3[建筑科学—结构工程] TU317.3