Diseño sismo resistente de muros de cortante considerando interacción suelo estructura

Abstract

Shear walls are a seismic-resistant structural system that has been shown to perform efficiently under seismic attack. In the common practice of design, the walls are considered to be embedded in the foundation level. This study evaluates the effects of soil-wall interaction on the performance of buildings with shear walls. A parametric study where embedded walls at its base are designed using the Direct Design Based on Displacement (DDBD) method and then its performance is evaluated through nonlinear history analysis in the time in which the soil is modeled. Height of the walls varies between 9 and 24m and three soil profiles with properties compatible with the profiles typified in the seismic-resistant design code UBC97 are considered. In the research it is observed that the soil structure interaction produces two main effects that affect the Response of the walls: (1) Addition of flexibility (rotation at the base) and (2) Increased damping due to the energy dissipated in the soil The details of the analyzes performed and a summary of the results obtained are presented.