Damage The Ductility Of Reinforced Concrete Structures

In recent years, as the changes in seismic performance problems caused by durability of concrete structures general concern of more and more scholars home and abroad. Carbonation of concrete, steel corrosion has been recognized as the most important factor of affecting the durability of reinforced concrete structures. As the majority of structures to withstand earthquakes have been used a certain number of years, its durability inevitably increase as the useful life of damage occur. Thus, to some extent, research related to new aspects of seismic performance, it is more important than research on new aspects of seismic performance to the seismic performance of damaged reinforced concrete structure. Ductility for seismic performance measurement is a very important indicator And good ductility is an important structural protection against earthquakes. This dissertation was mainly research on:Firstly, the ductility of reinforced concrete materials were analyzed, respectively, described the ductility definition, classification, measurement methods and influencing factors of reinforced concrete. The relationship between the curvature ductility factor and the displacement ductility index were analyzed and summarized, that the general structure of the curvature ductility factor is greater than the displacement ductility factor, the better the structure of the curvature ductility, the better the ductility is.This paper is also based on existing research results at home and abroad, introduced the reinforced concrete constitutive and disciplinarian of bonding properties of corroded steel bars and concrete with the change of the steel corrosion rate. And determine concrete, steel stress - strain relations that the finite element analysis used in this paper.The core content of this article is to use finite element analysis software ANSYS, on the damage of reinforced concrete beams in different carbonation of concrete and steel corrosion rate percentage of the mechanical properties of the numerical simulation Obtained the load-deflection curves of under the beam with various conditions. As a basis for calculating ductility factor of the beams of displacement, summed up the variation.