Seismic Response of Nonductile Flat-Plate Buildings

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Abstract
A method for representing the seismic response of nonductile flat-plate buildings is developed. The nonductile buildings are represented by elements with interpolated nonlinear zones that are adapted to fit with the experimental data. The load-deflection relation obtained from near-full-scale tests of the column slab connections is nearly elastic until punching failure occurs in the slab. Thereafter, there is a branch representing descending resistance associated with the punching failure. A flat-plate building represented with these elements evinces the progression of punching failures in the building. It is found that if the columns are ductile, a building of this type can remain standing after a moderate seismic event, but the damage is so extensive that the building might not be repairable.

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