Abstract
The building mass damper (BMD) system, which incorporates the concept of a tuned mass damper into a mid-story isolation system, has been demonstrated as an effective system for suppressing structural vibration due to earthquakes. The BMD system separates a building into a substructure, a control layer and a superstructure. By applying well-design parameters, the seismic responses of the superstructure and substructure of a building can be mitigated simultaneously. However, merely limited design parameters have been verified by shaking table testing because it is difficult to construct several sets of specimens with limited research funding. Therefore, real-time hybrid simulation (RTHS) may become an alternative to conduct parametric studies of the BMD system efficiently and economically. In this study, the BMD system is separated into a numerical substructure and an experimental substructure. The experimental substructure includes the control layer and the superstructure of the BMD system installed on a seismic shake table while the substructure is numerically simulated. Then, substructuring method of the BMD system is derived and the stability analysis considering the dynamics of the shake table is performed to realize the potential feasibility of RTHS for BMD systems. The stability margin is represented as an allowable mass ratio of the experimental substructure to the entire BMD system. Finally, RTHS of a simplified BMD system has been conducted to verify the stability margin in the laboratory. Phase-lead compensation and force correction are applied to RTHS in order to improve the accuracy of RTHS for the simplified BMD system.
Highlights
A novel structural system named as building mass damper (BMD) system, which combines the advantages of seismic isolation and tuned mass damper design has been proposed and studied
A total of 13 earthquakes normalized to a peak ground acceleration of 1.0 m/s2 were used as the excitation to the BMD system
The root-mean-square error (RMSE) is further reduced almost for all earthquake cases when the Phaselead compensation (PLC) is combined with force correction (FC), demonstrating that the PCL + FC is effective on achieving better real-time hybrid simulation (RTHS) results
Summary
A novel structural system named as building mass damper (BMD) system, which combines the advantages of seismic isolation and tuned mass damper design has been proposed and studied. The mass of the superstructure above the control layer can be designed as a tuned mass, becoming an energy absorber to suppress the response of the substructure. This system is called partial mass isolation technique, or large-mass ratio tuned mass damper (TMD), and has been extensively. De Domenico and Ricciardi (2018a) proposed an inerterbased vibration absorber combined with base isolation systems and performed parametric optimization considering different objective functions. The aforementioned researches explored the seismic performance of structures with various layout and allocation of isolation system and mass damper
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