Author(s)

I. Iskhakov

Abstract

The plastic energy dissipation (PED) and ductility are important parameters of RC structures in seismic zones. Several factors influence these parameters, mostly negatively, such as symmetrical reinforcing of RC section, over or under reinforcing, prestressing of concrete and gravitation loads. The influence peculiarities of reinforcing on its PED and ductility were analysed in a previous paper of this author. In this paper the influence of RC section initial stresses due to prestressing and gravitational loading on its plastic deformations is presented. Based on experimental results, it is assumed that the concrete modulus of elasticity increases linearly versus the compressive strength of concrete. Accordingly the ultimate elastic and ultimate plastic defo

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