基于钢筋握裹力的水泥路面纵缝形式研究

Research on Forms of Longitudinal Joint of Cement Concrete Pavement Based on the Bond Stress between Steel Bars and Cement Concrete

通过对16组水泥混凝土标准试件进行拉拔试验，研究拉杆长度和拉杆直径对握裹力的影响．结果表明，所有试件的破坏形式均为拉出破坏；随着拉杆锚固在混凝土中长度的增加，混凝土对拉杆的握裹力逐渐增大，增幅为5％-16％；随着拉杆直径的增加，握裹力强度的增长先快后慢，增幅为36％～51％．因此，在工程应用中，要综合考虑握裹力和经济性来选择合适的拉杆长度和拉杆直径．

Through the drawing tests of 16 groups of cement concrete standard specimens, the influence of the length and diameter of rod on the bond stress is studied. The results show that all the failure modes of all specimens are pulled out. With the increase of the length of the rod anchored in the concrete, the bond stress of the concrete to the rod gradually increased and its increase is 5% - 16%. With the increase of the diameter of the rod, the bond stress increases fast at first and then slow, and the increase is 36% -51%. Therefore, the length and diameter of the rod should be appropriately selected by comprehensively considering the bond stress and its economy in the engineering application.