Obtaining floor response spectra in a reinforced concrete building implemented with viscous dissipators: application to seismic analysis of a storage tank (#512)

Authors

Toledo Espinoza, Vlacev

De La Cruz Sanchez, Marines Renee

Llamccaya Calla, Mayte

Abstract

In the event of a seismic event, structural elements and non-structural elements (ENE) are prone to damage that destroys them totally or partially. Therefore, its protection is essential, even more so in buildings to house health centers, which are the refuge and first place of aid in the event of a catastrophic event, such as earthquakes. Therefore, the use of protection systems such as fluid viscous dampers (FVD) is a good option for dissipating seismic energy and improving performance. Even so, ENEs such as storage tanks, partitions, ceilings, and hanging pipes require an anchoring system that allows them to remain stable and not be a danger. For this reason, in this article we analyze an eight-level reinforced concrete structure implemented with an additional damping system through fluid-viscous dissipators and evaluate its capacity to reduce displacements and accelerations during telluric activities, with the main objective being to propose the construction of floor spectra, which are obtained after calculating the response histories of each level through an FNA response history analysis. The application of floor spectra is carried out through a spectral response analysis to obtain anchoring forces in a storage tank. In this work, the effect of the rigidity of the liquid in the tank is not considered. The analyses carried out in the building show a maximum decrease in accelerations on the eighth floor of 78% in the X and Y axes after adding the FVDs. On the other hand, it was evident that the anchoring forces required by storage tanks increase the higher the floor level. Likewise, in the X axis, the maximum decrease in anchoring forces was 62%, corresponding to the tank located on the roof, while in the Y axis, also on the roof, the greatest decrease in anchoring force is achieved; this reduction occurred by 63.1%. In both cases, the reduction of forces was achieved with the use of the FVD system.