Analysis of a Shear Wall Reinforced Concrete Building Heavily Damaged During the 2010 Chile Earthquake

Abstract eng:
Correctly assessing the non-linear behavior of structural elements in buildings can improve the results of a seismic design. In this work, the most probable causes of the observed damage in a shear wall building during the 2010 Chile earthquake were detected by using two different approaches implemented in commercial software. The first procedure predicts the precise time in which the building gets into the nonlinear range by performing a linear elastic analysis. The second approach uses a fiber model to represent the inelastic response of specific wall zones, considering materials properties and the hysteretic behavior. The proposed model was validated with experimental results of rectangular and T-shape walls. The model enabled to obtain the nonlinear response of the entire structure and to compare it with the results of the linear analysis. The significant variation of the axial load on the elements analyzed, as well as the reduction of the shear and moment forces of the walls with respect to the linear model were studied. Disadvantages of the extrapolation of results obtained from a single axis simplification with respect to the behavior of the entire structure were examined. Results obtained have given insight about the observed type of failure in shear wall buildings.

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