Experimental testing of a large 9-story structure equipped with multiple nonlinear energy sinks subjected to an impulsive loading

N. E. Wierschem, J. Luo, S. Hubbard, Larry Alan Fahnestock, B F Spencer, Alexander F Vakakis, Lawrence Bergman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Building structures can be critically affected by impulsive loads such as blasts, collisions, gusts, and pulse-dominated earthquakes. The addition of nonlinear energy sinks (NESs) in buildings has been proposed as a means to rapidly and passively dissipate the energy in a system exposed to this type of loading. This rapid dissipation occurs because the essential nonlinearity of the NES allows it to resonate with any mode of the structure and engage in targeted energy transfer, the nearly one-way transfer of energy to the NES where it is locally dissipated. Additionally, the NES couples the modes of the structure and facilitates the transfer of energy from the lower modes of the structure to the higher modes, where it can be dissipated at a reduced time scale. In this study the experimental performance of a system of multiple NESs in a large 9-story test structure is discussed. Two different types of NESs are used, each of which employ a different type of restoring force; one type of NES utilizes a smooth restoring force that is roughly cubic, while the other utilizes a linear restoring force coupled with one-sided vibro-impacts. To load this system, an impulse-like ground motion is applied via a large shake table. The results of this study show that the system of NESs greatly improves the performance of the structure across a wide range of impulse amplitudes by reducing and very rapidly attenuating its response.

Original languageEnglish (US)
Title of host publicationStructures Congress 2013
Subtitle of host publicationBridging Your Passion with Your Profession - Proceedings of the 2013 Structures Congress
Pages2241-2252
Number of pages12
StatePublished - Oct 17 2013
EventStructures Congress 2013: Bridging Your Passion with Your Profession - Pittsburgh, PA, United States
Duration: May 2 2013May 4 2013

Publication series

NameStructures Congress 2013: Bridging Your Passion with Your Profession - Proceedings of the 2013 Structures Congress

Other

OtherStructures Congress 2013: Bridging Your Passion with Your Profession
CountryUnited States
CityPittsburgh, PA
Period5/2/135/4/13

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ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

Cite this

Wierschem, N. E., Luo, J., Hubbard, S., Fahnestock, L. A., Spencer, B. F., Vakakis, A. F., & Bergman, L. (2013). Experimental testing of a large 9-story structure equipped with multiple nonlinear energy sinks subjected to an impulsive loading. In Structures Congress 2013: Bridging Your Passion with Your Profession - Proceedings of the 2013 Structures Congress (pp. 2241-2252). (Structures Congress 2013: Bridging Your Passion with Your Profession - Proceedings of the 2013 Structures Congress).