锚固类结构杆体临界锚固长度问题综合研究——国内相关研究进展(续)

文[28]（2007）报道了全长黏结玻璃增强聚合物锚杆破坏机制拉拔破坏模型试验。研究指出，在砂浆体强度较高条件下，可能发生锚杆拉断破坏，也可能发生剪切破坏；在轴向拉应力先达到锚杆抗拉强度时则会在自由段发生拉断破坏；在最大剪应力先达到纤维丝的抗剪强度时则在锚固段内先发生剪切破坏。试验测得的锚剐段杆体表面剪应力典型分布曲线见图15：

A Comprehensive Study on the Critical Anchorage Length of Anchored Structural Rods - Progress in Domestic Related Research (Continued)

Article [28] (2007) reported a pull-out failure model experiment on the failure mechanism of fully bonded glass reinforced polymer anchor rods. Research has pointed out that under conditions of high mortar strength, anchor rod tensile failure or shear failure may occur; When the axial tensile stress reaches the tensile strength of the anchor rod first, tensile failure will occur in the free section; When the maximum Shear stress first reaches the shear strength of the filament, shear failure occurs first in the anchorage section. See Figure 15 for typical distribution curve of Shear stress on the surface of the anchor section bar measured in the test