Semi-Active Resettable Devices for Seismic Protection of Civil Engineering Structures
This paper describes analytical and experimental studies into the effectiveness and feasibility of semi-active resettable devices for seismic protection of civil engineering structures. A series of shake table tests were performed on a one-fifth scale structure equipped with two newly developed resettable devices. The devices were installed as part of the lateral bracing of the structure to reduce structural responses induced by different seismic excitations. The independent chamber controlled devices can modify the hysteretic behavior of the structure by using different control laws. The results of the shake table tests are presented and interpreted in this paper. Following the experimental validation of the resettable devices, analytical studies were carried out to investigate the performance of a twelve-storey reinforced concrete building subjected to earthquake loading and controlled by resettable devices. Computer simulations were carried out to determine the optimal utilization of the resettable devices in the structure. In this paper, the optimal distribution of the devices is investigated and the effects of different control laws on the seismic response are discussed.