Structural Modeling and Elastic Calibration Based on Experimental Results for a Sensitive Torsion Structure
Reinforced concrete structures exhibiting tri-dimensional effects such as torsion and nonlinear response are a main concern in the field of earthquake research. The purpose of the paper is to present an example of structural modeling of a reinforced concrete structure sensitive to torsion and how to calibrate the structural response to the results of the experimental scale test using Perform 3D software. The analyzed structure is part of the scientific research program “Seismic Design and best-estimate Methods Assessment for Reinforced Concrete Building subjected to Torsion and non-linear effects’’ (SMART 2013), financed by “Commissariat a l’Energie Atomique et aux Energies Alternatives’’ (CEA) and “Electricité de France’’ (EDF). The scope of the program SMART 2013 was to analyze, compare and validate the design and the modelling methods used in evaluating the response of reinforced concrete structures subjected to high intensity seismic loads. The structure, tested using a seismic shake table, was built on a smaller scale (1/4), and it represent a part of a building that is used to host nuclear facilities. The geometry and the dimensions of the specimen were chosen in order to highlight the torsional-effects. To assess the behavior of vibrating mass structures were used both synthetic accelerograms and some real accelerograms. Calibration elastic structure, and thus determine the stiffness and damping characteristics, was based on the elastic acceleration response spectrum. The experimental results revealed a high degree of accuracy of the model in terms of overall behavior simulation of the real structure.
KeywordsStructural modelling Torsion Elastic calibration Seismic evaluation
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