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Implementation of a Simple Biaxial Concrete Model for Reinforced Concrete Membranes Open Access


Other title
mazars model
reinforced concrete membranes
reinforced concrete
damage model
finite element
biaxial concrete model
biaxial model
structural analysis
Type of item
Degree grantor
University of Alberta
Author or creator
Garcia Ramirez, Bernardo
Supervisor and department
Cruz Noguez, Carlos (Civil and Environmental Engineering)
Examining committee member and department
Tomlinson, Douglas (Civil and Environmental Engineering)
Cruz Noguez, Carlos (Civil and Environmental Engineering)
Adeeb, Samer (Civil and Environmental Engineering)
Department of Civil and Environmental Engineering
Structural Engineering
Date accepted
Graduation date
2017-11:Fall 2017
Master of Science
Degree level
Although significant progress in the modelling of the nonlinear response of reinforced - concrete (RC) structures at the element level has been achieved in the past decades, reliable and accurate analysis models at the system level for RC structures are scarce. Due to the complexity of elements required to model the 3D response of RC panels, nonlinear analysis of complete RC structures is avoided and instead the response of selected sub-assemblies, isolated from the rest of the structure, is examined in usual design practice. As a result, there is substantial uncertainty on the response of complete RC buildings, making it impossible to analyse global failure modes and making the design more complicated and potentially unsafe. Although simple structures can be designed and analysed based on the response of their components with good accuracy, RC shear wall buildings with complex geometries or under extreme loading necessitate the analysis of the full structure. Recent progress in the development of efficient element formulations to simulate the nonlinear in-plane and out-of-plane response of RC panels, and the availability of experimental data on the response of full shear wall structures, offers the possibility of developing reliable and efficient analysis models for entire RC structures under static and dynamic loads. This research discusses the advantages and disadvantages of some of the most prominent biaxial element formulations for the nonlinear finite element analysis (FEA) of RC structures. After the assessment, the Mazars concrete material, a damage-based model, is adapted for the use in finite element analysis in plane-stress multilayer-shell elements. The element formulations are implemented in the OpenSees framework, an object-oriented and open-source framework for simulating applications in earthquake engineering using finite element methods. Finally, the new Mazars model is used to perform quasi-static, reversed cyclic and dynamic analysis of specimens found in literature, and the analytical results are verified with the test data.
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