@article{TSIATAS2020110926,
title = "A comparative study of linear and nonlinear mass damping systems under seismic excitation",
journal = "Engineering Structures",
volume = "219",
pages = "110926",
year = "2020",
issn = "0141-0296",
doi = "https://doi.org/10.1016/j.engstruct.2020.110926",
url = "http://www.sciencedirect.com/science/article/pii/S0141029619344852",
author = "George C. Tsiatas and Aristotelis E. Charalampakis and Panos Tsopelas",
keywords = "Seismic response, Linear mass damper, Nonlinear energy sink, Friction nonlinear energy sink",
abstract = "A comparative study of the seismic response of structures equipped with linear and nonlinear mass damping systems is presented herein. Three optimized mass damping systems mounted at the top of a linearly elastic two-degree-of-freedom building are tested under an artificial seismic motion to assess their response. The artificial seismic motion is generated using the SIMQKE software and matching a specific response spectrum. The mass damping systems consist of (i) a Linear Mass Damper (LMD), (ii) a type-I Nonlinear Energy Sink (NES) with a nonlinear elastic spring of the cubic oscillator, and (iii) a Friction Nonlinear Energy Sink (FNES) which extends the NES with a friction element and a linear elastic spring of potentially negative stiffness. The results for each configuration are validated with a set of real scaled ground motion time histories matching the same specific spectrum, and a quantification of the response variability in relation to the input variability is attempted. An interesting observation is that the artificially generated excitation consistently underestimates critical design/response quantities, as compared to the average response of the set of real ground motions."
}