ON THE EFFECTS OF CIRCULAR BOLT PATTERNS ON THE ...

M e . .t . .A . .S . (5-17)
The prediction equation for the initial stiffness of the connection, E, with R 2 = 0.99 is;
Ee . .t . .A . .S . (5-18)
The prediction equation for the post yield stiffness of the connection, Et, with R 2 = 0.982 is;
E e . .t . .A . .Z . (5-19)
The prediction equation for maximum rotation at fracture, θf, with R 2 = 0.98 is;
θ e . .t . .A . .S . .Z . (5-20)
The summery of the statistical parameters of the nonlinear regression analysis are presented in
Appendix-F.
Figure 5-13shows the ±5% error envelope of the predicted moment capacity of the connection at yield
versus the actual moment capacity at yield. The results presented in this figure show a close agreement
between the predicted values and the results obtained from finite element analysis.
(kip.ft)
1500
1000
500
0
0 500 1000 1500
(kip.ft)
Figure 5-13 Comparison Of The Predicted Vs. Actual Moment Capacity Of The Connection At Yield With
±5% Error Envelope For The Category-2 Connections With Circular Bolt Pattern
Figure 5-14 shows the predicted initial stiffness of the connections versus the calculated initial
stiffness of the connection. The results presented in this figure show a close agreement between the
predicted and calculated initial stiffness of the connection.
100
Results
-5% error
+5% error