Shake table tests and numerical investigation of a resilient damping device for seismic response control of building structures

Abstract

In this study, shake table tests of a multistory steel frame structure designed according to Eurocodes 3 and 8 with and without the newly developed prestressed viscous damper (PVD) have been carried out at the Institute of Earthquake Engineering and Engineering Seismology in Macedonia. An array of strong ground motion records has been applied to the reduced-scale test structure to assess the efficiency and seismic performance of the equipped building with PVDs. It has been revealed that with the implementation of this system, the structural responses were suppressed in the range of 10% to 70%. Series of sensitivity analyses have been performed within the study to investigate the effect of the individual parameters and evaluate the effectiveness of the proposed system. Besides the experimental investigations, extensive numerical simulations of the structure without PVDs versus structure with three different damper placements were performed in ANSYS nonlinear platform, and part of the results that are presented in this paper confirms the remarkable structural performance improvement when using this system. The results also exhibit that the developed finite element models are properly verified through the experimental results and have the capabilities to further investigate the proposed system. It is likely that the proposed control strategy can be used for practical implementations into full-scale buildings to improve the urban seismic resilience. KEYWORDSdamper placement, numerical modeling, prestressed viscous damper, seismic resilience, shake table test, vibration control | INTRODUCTIONThe concept of structural resilience is a relatively new topic in the field of earthquake engineering. On the basis of the literature, a resilient system should have two main capabilities:• To maintain the structure functionality at an appropriate level during and after major seismic events.• To get recovered to its initial condition within a short period of time.

Study on the Damping Efficiency of a Structure with Additional Viscous Dampers Based on the Shaking Table Test

“…Experimental research on the damped structures can be conducted using pseudo-static tests [26]. Alternatively, a more direct approach is to utilize a seismic simulation shaking table for dynamic testing [27,28]. Nevertheless, there have been only a few shaking table tests that have specifically focused on the damped structure with additional viscous dampers and the non-damped structure without any additional viscous dampers.…”

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

“…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]. Through continuous research by scholars, various types of dampers have emerged, including a new type of seismic damper based on the yielding of cantilever metal components proposed by TS Ahn and other scholars [8], a magnetorheological (MR) grease damper proposed by T. Sakurai and other scholars [9], and a prestressed viscous damper (PVD) proposed by A Bogdanovic and other scholars [10].…”

Performance of Reinforced Concrete Shear Wall Equipped with an Innovative Hybrid Damper

“…The results showed that frames equipped with SBPB and PBSC performed better than frames equipped with BRB. Bogdanovic et al [20] evaluated steel structures with and without prestressed viscous dampers. The results showed that using this damper, the structural responses are reduced by 10 to 70% .…”