ANALYTICAL SIMULATION OF TLD AND ASSESSING THE EFFECTS OF TLD ON THE RESIDUAL DISPLACEMENT

Dağ B., Börekçi M.

18th World Conference on Earthquake Engineering (WCEE2024), Milan, İtalya, 30 Haziran - 05 Temmuz 2024, ss.1-10

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Milan
  • Basıldığı Ülke: İtalya
  • Sayfa Sayıları: ss.1-10
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Various control systems have been implemented to mitigate the effects of earthquakes on buildings, aiming to reduce the kinetic energy generated by dynamic activity caused by earthquakes and wind. Among these systems, Tuned Mass Dampers (TMD) and Tuned Liquid Dampers (TLD) serve as cost-effective and practical passive control mechanisms. TMD and TLD essentially operate on the same principle. In this operating principle, the period of the damper is equal to or in predetermined proportions close to the fundamental period of the building. TLD is more advantageous compared to TMD due to its cost-effectiveness and potential benefits in the event of a fire. When subjected to dynamic motion, such as wind and earthquake effects, the damper counteracts the movement of the building in the opposite direction. A damper with an optimal mass ratio relative to the building mass is selected and placed in the structure to achieve this motion. TLD can be also utilized to mitigate the residual displacement. The residual displacement value is crucial for a building after an earthquake because it directly affects whether the building is suitable for retrofitting or the cost of retrofitting. This paper investigates the effect of the TLD on the residual displacement of a 10-story reinforced concrete building in post-earthquake conditions. The building was modelled in SAP2000 and a validation procedure was implemented to determine the optimal mass ratio for the TLD, achieved through Nonlinear Time History Analysis (NLTHA) using 3 ground motion records.  Subsequently, after the TLD selection process, the residual displacement demand of the building with and without the TLD was determined, and the relationship between the TLD and residual displacement was established. The result of this paper indicates that TLD significantly reduces the residual displacement value by assisting in the recentering of the building.