Continuum damage model for compressive fatigue of high strength concrete.

Shaalan, Ali Mohamed Kamel Ali

Civil Engineering Department

December 1998

Abstract

An anisotropic elasto-damage model for predicting the response of concrete subjected to

monotonic and fatigue loading is presented in this research. The model utilizes a concrete appropriate

damage-effect tensor M in constructing the constitutive equations using the concept of multiple bounding

surfaces. One of the salient features is the introduction of a bounding surface that constrains the elliptical

movement of the limit fracture surface. The model after calibration is shown to predict the monotonic,

comprehensive uniaxial stress strain path for concrete of various strengths as well as S-N curves depicting

the fatigue response of concrete for uniaxial and biaxial loading. A concept of residual strength

determination based on continuum damage formulation is also introduced.

Continuum Damage Model for Comprehensive Fatigue of High Strength Concrete

by

Ali Mohamed Kamel Ali Shaalan

A Thesis Presented to the

FACULTY OF THE COLLEGE OF GRADUATE STUDIES

KING FAHD UNIVERSITY OF PETROLEUM & MINERALS

DHAHRAN, SAUDI ARABIA

In Partial Fulfillment of the Requirements for the Degree of

MASTER OF SCIENCE

In

CIVIL ENGINEERING

December, 1998