Angle Thickness

To investigate the effects of angle thickness on bolt force and M — 9r curve of connection, numerical analysis were performed for connection model A1, A2, and FE1 in which those angle thicknesses (tt) are assigned to be 9.5 mm, 12.7 mm, and 19.1 mm, respectively. Figure 11 shows the comparisons of bolt force, M — 0r curve and initial connection stiffness among those three connection models. From Figure 11, it is seen that (1) the thinner the angle thickness is, the bigger the prying force is exerted and the smaller the connection moment is; (2) increasing angle thickness from 9.5 mm to 12.7 mm and 19.1 mm, ultimate connection moment is upgraded by 1.4 and 2.1 times more than that in case of 9.5 mm angle thickness, respectively; and (3) an initial connection stiffness is linearly increased corresponding to an increment of angle thickness.

Fig. 13. Influence of beam height on prying force and moment-rotation behavior.

Fig. 14. Influences of mechanical properties of angle on prying force and moment-rotation behavior.