缓粘结部分预应力混凝土T梁试验研究及有限元分析  

Experimental research and finite element analysis on retard-bonded partially prestressed concrete T-shaped beams

作　　者：冯新[1] 周先雁[1] 刘泽亚[1] 

机构地区：[1]中南林业科技大学土木工程与力学学院,长沙410004

出　　处：《建筑结构》2015年第20期75-80,共6页Building Structure

基　　金：湖南省建设科技计划项目(2006468-28);湖南省自然科学基金资助项目(12JJ5012)

摘　　要：为了研究缓粘结预应力混凝土构件的受力性能和使用性能,对3根缓粘结部分预应力混凝土T梁和1根有粘结以及1根无粘结部分预应力混凝土T梁的受力性能进行了对比试验研究。结果表明,缓粘结部分预应力混凝土T梁的受力性能与有粘结部分预应力混凝土T梁极为相似,但明显不同于无粘结部分预应力混凝土T梁。采用有限元软件ABAQUS对缓粘结部分预应力混凝土T梁进行了非线性有限元数值模拟,分析中考虑了几何非线性和材料非线性的影响。选取适当的材料本构关系和单元类型,从梁的变形发展规律、正截面极限承载力和缓粘结预应力筋的应变发展规律等几方面与试验结果进行了对比分析。结果表明,数值模拟结果与试验结果吻合较好。To investigate the mechanical behavior and usability of retard-bonded prestressed concrete member, the comparative experimental studies were carried out on three retard-bonded partially prestressed concrete T-shaped beams,one bonded partially prestressed concrete T-shaped beam and one unbonded partially prestressed concrete T-shaped beam.It turns out that the retard-bonded partially prestressed concrete T-shaped beam is very similar to bonded partially prestressed concrete T-shaped beam in mechanical behavior,but is apparently different from unbonded partially prestressed concrete T-shaped beam. Finite element software ABAQUS was used for nonlinear finite element numerical simulation on the retard-bonded partially prestressed concrete T-shaped beams,considering both geometrical nonlinearity and material nonlinearity. On the basis of proper material constitution relationship and element type,comparative analyses were carried out with experimental results in aspects of deformation development law of beam,strain development law of ultimate flexural capacity and retard-bonded prestressed tendons. Results show that the simulation results coincide with test results fairly.

关 键 词：缓粘结 部分预应力混凝土T梁 试验研究 有限元分析 

分 类 号：TU317[建筑科学—结构工程] TU378.8