FRP筋混凝土梁非线性全过程分析  

Nonlinear Full-Range Analysis of Concrete Beam Reinforced with FRP Rods

作　　者：张海霞[1] 朱浮声[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2005年第10期1009-1012,共4页Journal of Northeastern University(Natural Science)

基　　金：辽宁省自然科学基金资助项目(20021008)

摘　　要：根据FRP筋混凝土梁的受力性能,以数值积分方法为基础,考虑材料的特性,编制计算程序,给出其弯距与曲率、荷载与变形的关系曲线,并与算例中的试验结果相对比,且二者吻合良好;探讨两曲线在不同受力阶段的特征,并将其分为截面开裂前和截面开裂后两阶段;分析配筋率和混凝土强度对截面弯距-曲率关系曲线的影响.研究表明,在截面开裂前,配筋率对弯距-曲率的影响很小;在截面开裂后,其影响较大,随着配筋率的增加,曲线斜率越大,截面刚度越大,梁的抗弯承载力越大;混凝土强度越高,截面的开裂弯距和极限弯距越大.According to the mechanical behavior of concrete beam reinforced with FRP rods and numerical integration a calculation program is given taking account of the properties of materials used. The moment-curvature and loading-displacement relationships of the beam are thus obtained then compared with experimental results with a goodness of fit shown. Discussing the properties of the two relationships in different loading phases, they are divided into pre-cracking and post-cracking segments of beam section. The effects of percentage of reinforcement and concrete strength on moment-curvature curve are analyzed and show that the effect of former in pre-cracking is much less than that in post-cracking. The higher the percentage of reinforcement, the greater slope of curve, section stiffness and flexural strength of beam. At the .same time, the higher concrete strength, the greater the cracking-moment and ultimate-moment on the beam section.

关 键 词：FRP筋混凝土梁 弯距-曲率关系 荷载-挠度关系 非线性分析 

分 类 号：TU398[建筑科学—结构工程]