FRP筋粘结式锚具的界面径向弹性模量分析

建立了FRP(Fibre Reinforced Polymer)筋粘结式锚具粘结界面的Rib-scale模型和Bar-scale模型,然后利用Fourier-Bessel级数推导了FRP筋、混凝土以及钢套筒等在径向应力作用下的解析解.解析解与数值解吻合较好,验证了用Fourier-Bessel级数表达的解析解的有效性....

Investigation on radial elastic modulus of an interface of bond-type anchorage for FRP tendon

Rib-scale model and Bar-scale model of bond interface for FRP (Fiber Reinforced Polymer) bond-type anchors are made. The analytical solution with Fourier-Bessel series is obtained for FRP tendon and concrete and steel sleeve when the bond interface is subjected to a radial traction. The overall agreement between the analytical and numerical solutions suggests that the validity of present approaches and its applicability to bond-type anchorage for CFRP tendons are proved. Based on this equivalence measure of the strain energies stored in the elastic bodies, radial elastic modulus of an interface for bond-type anchorage is available from the analytical expressions. The analytical results show that it is most significant for transverse elastic modulus for FRP tendon to radial elastic modulus. Radial elastic modulus of bond interface is applied to the numerical analysis for investigating the bond performance in detail. The numerical results show that Bar-scale model with radial elastic modulus of bond interface is significant for the radial performance or not for the axial performance.