EFFECT OF THE GEOLOGICAL IRREGULARITIES ON THE INPUT MOTION AND SEISMIC RESPONSE OF AN 8 STOREYS STEEL REINFORCED CONCRETE BUILDING CONSIDERING SOIL-STRUCTURE INTERACTION
MEE11613
Jose Roberto GUERRA CARBALLO
Supervisor: Masayuki NAGANO
Country: El Salvador
This study investigates the
effects of the geological irregularities on the input motion and seismic
response of an 8-storey steel reinforced concrete building considering the soil
structure interaction. The motivation regard on the seismic response
characteristics observed in the North and South sites of the Iwaki City Hall in
a distance of just 130 m during the aftershock of the March 11th,
2011 Great East Japan Earthquake. 2D Finite Element Models (FEM) were used to simulate
soil and structural responses considering inclined engineering bedrock beneath
the building. The 2D FEM represent the seismic response in good agreement with
the observed records of the aftershocks. The dynamic characteristics of the
soil responses at the North and South site are different mainly due to the soil
condition beneath each site, though, the parametric study revealed that the
effect of the inclined interface of the engineering bedrock has a minor
influence on the seismic soil response. Moreover, it was found and equivalency
between the inclined engineering bedrock model and other model considering
flat-soil layers, and the input motion and seismic response of the structure
were similar.