无粘结部分预应力混凝土梁恢复力模型的研究  

Research on restoring force model of unbonded partially prestressed concrete beams

作　　者：唐昌辉[1] 叶林[1] 赵铸 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]株洲市规划设计院,湖南株洲412000

出　　处：《自然灾害学报》2014年第1期202-209,共8页Journal of Natural Disasters

基　　金：国家自然科学基金项目(51278179)

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,对不同配筋率的13根无粘结部分预应力混凝土梁进行了分析,建立了无粘结部分预应力混凝土梁的弯矩-曲率恢复力模型,根据得到的弯矩-曲率恢复力模型,采用虚梁法编程计算了无粘结部分预应力混凝土试验梁的弯矩-挠度滞回曲线,计算结果与试验结果吻合良好。恢复力模型的建立为无粘结部分预应力混凝土梁的抗震性能研究提供了理论依据,具有理论和工程实际意义。Based on completed tests of sixteen unbonded partially prestressed concrete beams under low cyclic loading, thirteen specimens with different longitudinal reinforcement ratios were analyzed. The moment-curvature restoring force model of the unbonded partially prestressed concrete beams was presented based on the experiment. With the restoring force model, a program was developed with virtual beam method to obtain the moment-deflection hysteretic loops of tested beams. The calculation results agree reasonably with experiment results. The restoring force model can provide theoretical basis for studying the seismic performance of unbonded partially prestressed concrete beams and has theory and actual project significance.

关 键 词：无粘结部分预应力混凝土梁 低周反复荷载 弯矩-曲率恢复力模型 弯矩-挠度滞回曲线 延性 

分 类 号：TU378.2[建筑科学—结构工程]