Title:
Modeling of Concrete Damage
Author(s):
Young Soo Chung, Christian Meyer, and Masanobu Shinozuka
Publication:
Structural Journal
Volume:
86
Issue:
3
Appears on pages(s):
259-271
Keywords:
cracking (fracturing); cyclic loads; damage; earthquakes; energy dissipation; failure; fatigue materials; frames; mathematical models; reinforced concrete; strength; Structural Research
DOI:
10.14359/2895
Date:
5/1/1989
Abstract:
As concrete is subjected to loading of increasing intensity, it undergoes different phases of damage, from microcracking up to ultimate failure. It is necessary to simulate this process mathematically to predict accurately the residual capacity of damaged structures to resist further load. Of particular concern are members that have been subjected to several damaging load cycles of a major earthquake. Many different damage models have been proposed in the past. Most of these are not well suited to predict the residual strength of damaged members. Paper reviews some basic facts about concrete damage and uses these to model damage systematically as a low-cycle fatigue phenomenon. The energy dissipation capacity of a member, instead of the number of cycles to failure, is taken as the main variable, which depends on many different factors. The model is capable of simulating reasonably well the strength and stiffness degradation of reinforced concrete members subjected to strong cyclic loads.