摘要
目的对FRP筋与混凝土粘结滑移性能进行数值模拟.方法利用ANSYS非线性有限元程序,对混凝土、FRP筋以及两者之间的粘结滑移作用分别采用不同的单元类型,考虑各材料及其之间的本构关系,对FRP筋混凝土拉拔试件建立分离式的有限元模型,并对其进行计算分析,进一步将计算结果与试验结果进行对比分析.结果对比研究表明,拉拔试件的荷载-加载端、自由端滑移曲线与试验曲线相比,两者吻合较好,且荷载-加载端滑移曲线与试验曲线的吻合程度比自由端要好.另外,模拟得到的试件极限荷载、粘结应力峰值与试验结果均吻合较好,而其相对应的滑移计算值与试验结果相比略大.结论ANSYS非线性有限元程序能够有效地模拟FRP筋和混凝土之间的粘结滑移作用,可以得到较为准确的极限状态值,也能较为准确地模拟粘结滑移的真实受力过程.
The paper uses the different elements model to simulate the material properties of concrete, FRP bars and the bond-slip between them in ANSYS. Considering the constitutive relationship of concrete, FRP and bond-slip between them, the separated finite element model of concrete specimens reinforced with FRP bars is analyzed. The numerical study shows that the loading-sllp of loaded and free-end curve of specimens was in good agreement with the experimental results. The results of the loaded were much better than those of the free-end. In addition, the ultimate load and bond stress were in accord with the experiment results. At the same time, the related slip was a little greater than those in pull-out test. In brief, the behaviors of bondslip between FRP bars and concrete are effectually simulated; the ultimate values are exactly obtained and the real stress process is accurately simulated in the finite element program of ANSYS.
出处
《沈阳建筑大学学报（自然科学版）》
EI
CAS
2007年第2期231-234,共4页
Journal of Shenyang Jianzhu University：Natural Science
基金
交通部攻关项目(200235332107)
沈阳市科委基金项目(1032045-3-1-3)
关键词
FRP筋
粘结滑移性能
有限元
数值模拟
FRP bars
bond-slip between FRP bars and concrete
finite element
numerical simulation
