Seismic Response Evaluation of RC Tower Connected to Short Rigid Buildings

Abstract

In urban construction with the presence of tall buildings adjacent to short buildings, civil engineers have tried to connect low-rise rigid buildings to tall buildings in order to enhance the rigidity of the towers and decrease seismic response induced by earthquake excitation. From recent developments in earthquake energy dissipation systems, the application of viscous dampers for coupling of parallel and adjacent buildings to reduce earthquake effect has been considered by civil engineers, and many investigations have been conducted. In the present study an attempt has been made to evaluate the effect of connecting reinforced concrete towers to short rigid building through viscous damper devices. For this purpose, a 10-story RC tower connected to two short RC buildings by viscous damper was modeled and analyzed under Elcentro (1940) earthquake record excitation by using the finite element technique. In addition, the effect of various viscous damper damping coefficients on seismic response of the tower was evaluated by analyzing the aforementioned tower with various damper damping coefficient to the short building. The results showed improvement of seismic response of the tall building which was supported by short RC buildings through viscous damper device during earthquake. Moreover by increasing damper damping coefficient response of the tower structure the displacement was effectively reduced.

Research on application of viscous damping technology in reinforcement and reconstruction of existing buildings

“…In order to solve the seismic and vibration reduction problems of existing buildings, many scholars have conducted extensive research. Some scholars have conducted extensive damper design and experiments, and used experimental data to determine the damping coefficient and damping characteristics of viscous dampers [1]; Some scholars have evaluated the impact of different viscous damper damping coefficients on the seismic response of towers by analyzing the impact of towers with different damper damping coefficients on low rise buildings [2]; Some scholars have conducted different types of simulations using modal analysis and seismic time history analysis, and obtained data that can determine the nonlinear characteristics of fluid dampers [3]; Some scholars even use genetic algorithm based search methods to test the optimal distribution of damping coefficients [4]. Scholars have also conducted research on the impact of viscous damping on low-rise reinforced concrete frame structures under earthquakes, compared the seismic evaluation of RC buildings with and without friction dampers, and studied the impact of friction damping isolation systems on the performance of prefabricated concrete buildings [5][6][7].…”

Analytical Model for Viscous Wall Dampers

“…() and Hejazi et al. () developed a finite element model for the numerical modeling and seismic analysis of viscous dampers in multistory RC buildings and to detect failure in structural members. Detecting the probable damage to dampers or to the connecting links of a structure is a major concern of seismic control systems.…”