Closure to 'Observations on the Reliability of Alternative Multiple-Mode Pushover Analysis Methods' by T. Tjhin, M. Aschheim, and E. Hernandez-Montes

摘要

The authors in no way wish to diminish the discusser's contribution to the development of the MPA procedure. Much of the discussion focused on this procedure, although the technical noternwas concerned only with two alternative procedures, in which energy-based pushover curves are used to identify modal contributions.rnThe discusser acknowledges that the MPA procedure can cause reversals in the higher-mode pushover curves obtained for some buildings. Because inelastic response dissipates energy (rather than creating energy), it is not appropriate to represent the building using an equivalent SDOF system whose force-displacement response contains such a reversal. To do so would imply a violation of the first law of thermodynamics.