doi:10.3850/978-981-08-7920-4_S2-A10-cd

ABSTRACT

In this numerical study, an investigation is carried out to analyze the earthquake induced pounding between two insufficiently separated base isolated buildings considering the inelastic behavior of the structures’ response. The base isolated buildings are modeled as a four-story and a three-story system to simulate the structural behavior. Moreover, non-linear viscoelastic impact elements are applied to model the collisions at different story levels using the Elcentro 1940 earthquake record. The resulting systems of second order constant coefficient equations are reformulated as a system of first order ordinary differential equations and solved using the ordinary differential equation solver of MATLAB. The pounding behavior of the buildings has considerable influence on the behavior of the lighter building causing substantial amplification of the response and leading to considerable permanent deformations due to yielding. On the other hand, the behavior of the heavier building is nearly unaffected by the collisions between the structures.

Keywords: Earthquake engineering, Base isolation, Building pounding.

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