Abstract:
An analytical investigation of the P-A effects in medium height steel
moment resisting frames to selected earthquake motions is reported.
The frames with various design drifts and fundamental natural
periods were designed according to the load provisions for New
Zealand seismic risk zone A of the Draft Code of Practice for General
Structural Design and Design Loading for Buildings, DZ4203. The
effect of strength degradation was investigated. Dynamic magnifica-tion
factors for the member forces and displacement are also
presented. Limits for the maximum plastic hinge rotation, inelastic
drift, curvature ductility, displacement ductility and prediction of
maximum plastic hinge rotation based on the inter-storey drift are
suggested.
