Possible problems;
1. Constraints. I've tied the column to the joint and beam to the joints (Precast concrete). But i suspect there are over constraint nodes between the beam and column edges near the joints. What can i do to resolve this?
2. Boundary Conditions problem. Load displacement can be applied successfully in Y-direction but no so in Z-direction at the edge of the beam. Why?
3. Non-convergence issue. Possibly the time displacement is too large in amplitude?