新型复合FRP锚杆的延展性及协调性数值分析

针对岩土锚固系统中单一材料纤维增强复合材料（Fiber Reinforced Polymer,FRP）锚杆固有的脆性特征以及延展性较差的问题,提出新型复合FRP锚杆——MFRP（Metal FRP）锚杆.该锚杆由中心的高延展性金属材料、外层的FRP以及连接金属材料和FRP的钢纤维层构成.根据复合材料混合法理论分析MFRP锚杆的延展性,并用MSC Marc模拟分析其协调性.MFRP的应力应变曲线及锚杆受拉力情况下界面剪应力表明：MFRP的延伸率比普通的FRP提高大约15倍;通过添加钢纤维层,MFRP的界面平均剪应力比未添加钢纤维层的材料减小一半左右,从而使界面间的变形更加协调.

Numerical analysis on ductility and harmony for new composite FRP anchor

As to the poor ductility and brittle failure of Fiber Reinforced Polymer(FRP) anchor which is used in geotechnical anchorage system, a new composite FRP anchor Metal FRP(MFRP) anchor is proposed. The anchor is composed of mental material with high ductility in the center, FRP layer and steel fiber layer which connects metal material with FRP layer. The ductility of MFRP anchor is analyzed according to composite hybrid method and the harmony is simulated and analyzed by MSC Marc. The stress strain curve of MFRP and the interface shear stress by imposing tensile force are presented. The results indicate that the elongation rate of MFRP is greater than that of ordinary FRP by about 15 times, and the average interface shear stress is reduced a half by adding the steel fiber layer which improves the harmony of interfaces.