The shear behavior of concrete blocks reinforced by fully grouted bolts with different diameters was studied in this paper. More than 90 intact cubic samples (100 mm × 100 mm × 100 mm) with bolts ranging from 2 mm to 5 mm in diameter were tested at a constant stain rate of 0.5 mm/min. An oblique shear apparatus, which could simultaneously apply shear and normal force on tested samples at three slope angles (53°, 58°, and 63°) of a predetermined shear plane, was employed. The results indicate that the bolt has no evident influence on the shear behavior of intact concrete blocks at the prepeak shear strength stage. The bolt could significantly reduce the shear strength drop in the peak shear strength of the concrete block and contribute to reserving the residual shear strength of concrete blocks, especially at steep slope angles of the shear failure plane. The shear resistance provided by the bolt to the concrete block at the residual shear slip stage has a positive relationship with the diameter. The bolt with a larger diameter inflected in the vicinity of the shear failure plane of concrete block at the postpeak shear strength stage; additional normal force and direct shear resistance could still be persistently provided. Two empirical equations of the apparent cohesion and apparent internal angle of the bolted concrete block were obtained by linear regression considering rb, which is the ratio of the cross-sectional area of the bolt to that of the bolted concrete block.
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机译：研究了用不同直径的全注浆螺栓加固的混凝土砌块的抗剪性能。使用直径范围为2 mm至5 mm的螺栓测试了90多个完整的立方样品（100 mm××100 mm××100 mm），恒定染色速率为0.5 mm / min。使用可以在预定剪切平面的三个倾斜角（53°，58°和63°）上同时在测试样品上施加剪切力和法向力的斜切设备。结果表明，在峰值强度之前，螺栓对完整混凝土砌块的剪切性能没有明显影响。螺栓可以显着减少混凝土砌块的峰值抗剪强度中的抗剪强度下降，并有助于保留混凝土砌块的残余抗剪强度，特别是在剪切破坏平面的陡坡角处。在残余剪切滑移阶段，螺栓提供给混凝土砌块的剪切阻力与直径成正比关系。在后峰值剪切强度阶段，较大直径的螺栓在混凝土砌块的剪切破坏平面附近弯曲。仍然可以持续提供额外的法向力和直接抗剪力。通过线性回归，考虑了rb的截面积与螺栓混凝土块的截面积之比，得出了螺栓混凝土块的表观内聚力和表观内角的两个经验方程。
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