Evaluation of an existing industrial building retrofitted with fluid viscous and viscoelastic dampers under no-pulse and pulse-like base excitations

Abstract

A retrofitting methodology using passive control devices, was adopted in this study for the performance improvement of an existing industrial building in Malatya, Yeşilyurt. The efficiency of the methodology was investigated through the analytical model developed in SAP2000. The structure was constructed in 1989, and the design report of the structure is unreachable. Therefore, site investigations were carried out to determine the necessary dimensions and material properties as well as soil class. The structure was exposed to severe earthquakes and fire, and hence the industrial building is currently out of use because of possessing risk of life safety. Previous retrofitting studies using steel jacketing and addition of shear walls were not enough to reach the desired level of performance. For this reason, a retrofitting methodology using passive control devices, fluid viscous dampers and viscoelastic dampers, was chosen as an alternative tool for bringing the structure to the desired performance level. Firstly, within the investigation, the performance level of the structure was determined according to TBDY 2018, and the necessity of a new retrofitting methodology was demonstrated. Then, the structure's finite element model (FEM) was updated by adding the passive control devices properly. The Nonlinear Time History Analysis (NLTHA) method was used to obtain the plastic deformation demands on the members. The structure is very close to the East Anatolian Fault, and therefore near-fault effect having velocity pulse characteristics on the response was also considered in the analyses. In line with this purpose, ten different earthquake records, comprised of five no pulse like records and five pulse-like records, were selected according to TBDY 2018, and NLTHA were conducted for the bare frame, damped with FVD frame, and damped with VE frame separately, and results were evaluated.