STUDY ON PLASTIC-DAMAGE SEISMIC MODEL FOR REINFORCED CONCRETE FRAMES

A plastic-damage model for reinforced concrete frames was developed based on the classical plastic model and the continuum damage model.The plastic-damage constitutive law was implemented into a beam model for framed structures,in which these were described by elastic beams and columns with two inelastic hinges at their ends.A damage index useful in evaluating the state of structural members and a meaningful global damage index for whole structure were introduced.The plastic-damage model,together with the member and global damage indices,were adequate for the computation of the limit load of reinforced concrete frames subjected to seismic actions.Examples of applications of the methodology to the non-linear analysis of reinforced concrete framed structures were finally given． The result indicates that the model has reliable accuracy．