A numerical model to simulate the behavior of reinforced concrete members subjected to biaxial earthquake excitation
Abstract
Constitutive models are developed to define the dynamic response of concrete and steel reinforcement subjected to cyclic loading varying randomly in magnitude. The models are combined to determine the behavior of reinforced concrete systems subjected to biaxial excitation. The composite model is tested using data from static and dynamic tests. Comparisons with the measurements showed that the proposed algorithm is a reliable vehicle for modeling dynamic response at levels of excitation ranging from low (less than yield) to high excursions. The sensitivity of the proposed algorithm was checked. The algorithm was found to be insensitive to the changes in input parameters related to concrete and sensitive to input parameters related to reinforcing steel. A numerical study was also performed to study the nonlinear response of reinforced concrete structures to identify the differences in their maximum-displacement response subjected to biaxial and uniaxial base excitations. Single-mass systems were analyzed using the proposed algorithm. Initial stiffness, base shear strength, and earthquake frequency content were the main variables. Results indicated that maximum-displacement ratio for biaxial base excitation to uniaxial base excitation remained below 1.5, with most of the results around 1.0, provided that a base shear requirement was satisfied.
Degree
Ph.D.
Advisors
Sozen, Purdue University.
Subject Area
Civil engineering|Mechanical engineering
Off-Campus Purdue Users:
To access this dissertation, please log in to our
proxy server.