Title: Effect of Horizontal Earthquake on Buckling of Concrete Domes
Author(s): Nathalie E. Moreno Madueno, Mehdi Moslemi, and Reza Kianoush
Publication: Structural Journal
Appears on pages(s): 243-253
Keywords: buckling; earthquake; finite element; reinforced concrete; spherical shell; stability
The buckling failure of reinforced concrete spherical shell structures under the effect of the horizontal component of earthquakes is investigated using the finite element method over a wide range of shell configurations. For this effect, two different loading case scenarios are considered; first, the shell is analyzed under the effect of vertical seismic component alone. Then, the model is reanalyzed under the same loading conditions plus the horizontal earthquake component, taking into account two different horizontal-to-vertical earthquake spectral ratios. It is concluded that including the horizontal component of earthquake can result in a slight reduction in the buckling capacity of this type of structures, the impact of which is highly influenced by the horizontal-to-vertical earthquake spectral ratio and shell geometry. It is also observed that the formulation adopted by ACI 372R slightly overestimates the buckling capacity of spherical shells, especially when horizontal seismic effects are included.