(4) At a high slope angle of the shear plane, the differences in the percentage drop in shear strength between samples with different diameters of bolts are 15%~ 20%, which is more evident than that at the low slope

angle of shear plane, indicating the effectiveness of the bolt in the stability control of slopes with steep fractures.

It can be inferred from the aforementioned equations that the shear resistance could be improved by the

angle of shear reinforcement up to 1.41 times once the angle is 45[degrees].

The drift

angle of shear wall is 1/120 under severe earthquake in Chinese seismic design code, and the drift angle limit of glass curtain wall is 3/1000 (about 1/333), which is far less than that of shear wall.

where [theta] is the

angle of shear distortion in the shear zone; [PHI] is the soil friction angle and [t.sub.R] is the total mobilised tensile stress of root fibre per unit area of soil.

Where: [[sigma].sub.v] = 0.7-0.9 UTS, t: sheet thickness, [alpha]:

angle of shear Horizontal ([F.sub.h]) to vertical ([F.sub.v]) component ratio of shearing force equals to 1/3 theoretically, but to 1/5 practically.