Influencia del comportamiento dinámico de una edificación regular para la selección del método de análisis de resistencia sísmica.

Abstract

The Colombian Code for Seismic Design and Construction (NSR-10) requires the use of methods to perform a dynamic analysis of a given structure based on its geometry and irregularity. However, the integration of elements that provide stiffness to the seismic resistance system of the building (walls or bracing) are not taken into account as a selection criterion in the dynamic analysis method. The main objective of this research is to study the influence of the high stiffness elements involved in the dynamic behavior of the structures, by means of relative analysis in their modal parameters, through seismic resistance analysis methods, such as the Equivalent Horizontal Force (EHF) method and Elastic Dynamic Analysis, required by the regulation (NSR-10), in regular and symmetrical reinforced concrete buildings in their vertical and horizontal plane of 10 levels. The proposed buildings have variations in the geometry of their elements and spacing between their vertical elements, to predefine their own dynamic behavior and different for the cases of study, such as shear, internal bending and global bending behavior. The results obtained show an increase in the difference between the seismic forces obtained between the FHE and ADE methods as the stiffness contrast between the elements increases. Based on the above, this research raises the possibility of considering the mechanism that governs the dynamic behavior of a building as an important parameter for the selection of the seismic resistance analysis method. With the results obtained, it can be inferred that the correct selection of the basic analysis methodology and the understanding of the structural performance can be translated into the reduction of construction cost overruns of the building.