Performance of tuned mass damper against structural collapse due to near fault earthquakes

DOMIZIO MARTÍN; AMBROSINI, DANIEL; CURADELLI, OSCAR

JOURNAL OF SOUND AND VIBRATION

ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2015 vol. 336 p. 32 - 45

0022-460X

The tuned mass dampers (TMD) are devices capable of reducing structural vibration bymeans of an energy transfer that is established between the structure to be protected and the control device. This vibration control strategy has a relatively recent use in civil structures, having been proven effective against the action of wind and far-fault earthquakes. Meanwhile, the near-fault seismic records have a short significant duration, with few pulses of high amplitude and low frequency. These characteristics raise a question about the TMD performance against this type of earthquakes, due to the device has a limited time to transfer energy from the main structure.In this paper the efficiency of the TMD to prevent the collapse of a structure subjected to the action of a series of near-fault records is analysed. The structure used is a 4-story steel frame on which a TMD with different values of mass is incorporated. From a series of nonlinear dynamic analysis, where the scale of seismic records is modified, the minimum amplitude of each record that produces the structural collapse is found. By comparison of the results of the structure with and without the addition of the control device, conclusions about its performance and capability in the prevention of collapse are established.