NUMERICAL ANALYSIS OF BOND-SLIP BEHAVIOR IN RC BEAMS BASED ON OPENSEES
- 建筑土木－已发表论文 
粘结滑移性能的数值分析是钢筋混凝土结构研究的热点,该文在总结现有粘结滑移本构关系的基础上,采用分离式思想在OpenSees中建立粘结滑移精细化分析模型,并通过拉拔试件与RC梁构件的数值分析研究梁中钢筋与混凝土的粘结滑移作用,同时考虑箍筋量对构件滑移分布的影响。经过该文分析可知,该数值分析模型具有一定的合理性,能较准确的反映出粘结应力、滑移等分布的规律;通过梁构件数值分析可知,其整体性能受到粘结性能、钢筋滑移量大小及箍筋配置等的影响,箍筋的配置对构件局部滑移会产生一定的影响,但对滑移的整体分布影响并不显著。Many scholars have done a lot of research on bond-slip behavior in reinforced concrete structures. Besides experiments, numerical analysis is also important. In this paper, on the basis of summarizing bond-slip models nowadays, a refined model in OpenSees according to the method of discrete model is built and then the bond-slip behavior between rebar and concrete is studied through analyzing a pull-out specimen and RC beam component. The influence of stirrup on bond stress and slip distribution is considered. From the analytical results, it is found that the numerical model is reasonable to reflect the bond stress and its change law. At the same time the phenomena of beam simulation show that many factors have effects on its whole performance such as the bond stress, slip of rebar and ratio of stirrups which can affect the bond-slip distribution. The stirrups affect the slip in part of the beam but in general it has little effect.