CD02-008 MODELING CONCRETE BEHAVIOR UNDER REVERSED CYCLIC LOADING H. Dabbagh 1 , F. Aslani 2 1 Assistant Professor, Department of Civil Engineering, University of Kurdistan, Sanandaj, Iran 2 M.Sc Student, Department of Civil Engineering, University of Kurdistan, Sanandaj, Iran ABSTRACT The computational simulating and analysis of reinforced concrete structures nonlinear behavior is subjected to reversed cyclic loading dependent on the modeling of nonlinear constitutive laws of materials. Nonlinear behavior of structural concrete includes cracking, crushing, tension stiffening, compression softening and bond slip where reversed cyclic loadings introduces further complexities, such as stiffness degradation in concrete and the Bauschinger effect in reinforcing steel. In this paper the reliability of presented constitutive models for concrete subjected to reversed cyclic loading that considers transition curve between compression and tension by using crack closing model is investigated. In the analysis of reinforced concrete structures, a number of diverse approaches have been used for material modeling. These include plasticity-based procedures, fracture mechanics procedures, and various nonlinear elastic models where this simulation is related to constitutive models based on elasticity approach. For these aims, by reviewing the results of experimental tests on concrete specimens under cyclic loading in both compression and tension, and by reviewing suggested constitutive models by various researchers especially important simple models, the accordance of these constitutive models with experimental results are investigated. Keywords: constitutive models, reinforced concrete structures, nonlinear behavior, reversed cyclic loading, crack closing model 1. INTRODUCTION Although experimental programs in laboratories for identifying nonlinear behavior of reinforced concrete (RC) structures give real results but they are limited to the knowledge of particular cases under restricted structural dimensions, sizes, shapes, loading and boundary conditions but the computational simulation approach has no limit to its application. A significant research effort to characterize the monotonic and cyclic behavior of concrete has been devoted to this task and these research efforts have increased even more with recent development of computational methods applicable to RC structures. A large variety of concrete models have been produced in the last years. These models can be categorized according to three approaches: models which are based on theory of elasticity, models which are based on theory of plasticity and models based on fracture mechanics (CEB [1]).
MODELING CONCRETE BEHAVIOR UNDER REVERSED CYCLIC LOADING
Jun 20, 2023
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Related Documents
