无粘结部分预应力混凝土梁非线性全过程滞回分析  

Nonlinear Full Range Hysteretic Analysis on Unbonded Partially Prestressed Concrete Beams

作　　者：唐昌辉[1] 倪佳[1] 叶林[2] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]中机十院国际工程有限公司,河南洛阳471003

出　　处：《湖南大学学报（自然科学版）》2015年第7期62-68,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50978091)~~

摘　　要：在已完成的16根无粘结部分预应力混凝土梁低周反复荷载试验的基础上,合理地选择了各材料的本构关系模型,深入分析了无粘结部分预应力混凝土梁的受力特性,通过设置刚性短臂将无粘结预应力筋的作用等效为外荷载,综合运用'分级加变形'和'分级加荷载'的方法,提出了无粘结部分预应力混凝土梁的非线性全过程滞回分析方法,编制了MATLAB计算程序.对比试验结果与计算结果,吻合程度良好,具有一定的理论和工程意义.Based on the tests of sixteen unbonded partially prestressed concrete beams under low cyclic reversed loading, the constitutive relations under cyclic loadings of every material were selected reasona- bly. After an in-depth analysis on the mechanical characteristics of unbonded partially prestressed concrete beams, unbonded prestress actions were converted to their equivalent loads by setting short rigid arms. Then, a nonlinear full range hysteretic analysis method for unbonded partially prestressed concrete beams was proposed by combining the step deforming method and the step loading method, and a MATLAB pro- gram was developed. Through comparisons and analyses, the calculated results coincide well with the tes- ting results. So it has theoretical and practical engineering significance.

关 键 词：无粘结部分预应力混凝土梁 低周反复荷载 非线性 滞回曲线 数值计算 

分 类 号：TU378.2[建筑科学—结构工程]