Title:
Softened Damage Model for Finite Element Analysis of Structural Concrete Deep Beams
Author(s):
Fang Wang, Susanto Teng, and Sau Cheong Fan
Publication:
Structural Journal
Volume:
98
Issue:
1
Appears on pages(s):
27-35
Keywords:
beam; prestressed concrete; strength
DOI:
10.14359/10144
Date:
1/1/2001
Abstract:
This paper presents a new damage model incorporating a softening criterion for concrete and its applications to structural concrete deep beams. The model is a two-dimensional damage constitutive model in which different damage scalars are utilized to represent the stress-induced anisotropy in the principal stress directions. The damage scalars in the principal stress directions, combined with the softening coefficient, give the constitutive model a physical background in reflecting the prefailure and postfailure material behavior, tensile cracking, and strain softening of concrete. The validity of the model has been verified by experimental results involving simple and continuous prestressed and nonprestressed concrete deep beams. The results from the finite element simulation using the new model agree very well with the experimental observations, especially with regards to load-deflection response, crack patterns at different load stages, and failure modes.