摘要
钢筋的外形特征对钢筋与混凝土之间的黏结性能有很大的影响。冷轧螺旋钢筋作为一种新型钢筋,目前国内对该类型钢筋的研究不多,针对这一现状,进行了4组不同外形钢筋拉拔试件在单调加载下的拔出试验。试验结果表明:冷轧螺旋钢筋具有较大的黏结强度,与混凝土具有较好的共同工作性能。同时采用分离式模型,引入内聚力黏结模型,并以冷轧螺旋钢筋拉拔试验结果为参照,利用abaqus建立该类型钢筋拉拔试验的计算模型。通过与试验结果的比较,结果符合较好,验证了该计算模型的合理性。
External shape of steel bar have great effect on bond-slip relationship between steel bar and concrete.Because cold-rolled spiral steel bar is a newly developed,currently studies on it are seldom.Four groups of pullout specimens with different shape steel bars are tested under monotonic loads.The results show that cold-rolled spiral steel bar has excellent bonded performance,and can work with concrete well.The cohe-sive zone model（CZM）is used to simulate bond-slip relationship between steel bar and concrete in a separate model.The experiment of cold-rolled spiral steel bar is calibration experiment,which is simulated by abaqus.A good agreement is obtained between numerical results and experimental results,which shows the model is reasonable.
出处
《混凝土》
CAS
CSCD
北大核心
2011年第2期49-51,118,共4页
Concrete
关键词
冷轧螺旋钢筋
拉拔试验
黏结单元
数值模拟
cold-rolled spiral steel bar
pullout experiment
cohesive element
numerical simulation
