Global loss factor in steel structures with viscoelastic dampers through state equations

  • Jhon Jairo Gil-Peláez Universidad Santo Tomás Bucaramanga
  • Luis Suárez University of Puerto Rico Mayagüez
Keywords: Viscoelastic dampers, viscoelastic materials, energy dissipation, loss factor

Abstract

In this work, is presented a method based on use complex eigenvalues to determine factors of overall loss  and  equivalent  natural  frequencies  in  a  steel  frame  with  viscoelastic  dampers  in  the  bracing  bars.  The complex eigenvalues  are  obtained  to  solve  the  eigenvalue problem associated with the equations of motion written  as  state  equations  of  first  order.  A study using three-dimensional finite element models developed in ABAQUS program including variations with frequency of materials was also made. The estimations at the global loss factors was achieved from an analysis of the frames subjected  to  a  harmonic  load  in  regime  using  the  half power method. The study allows to check the effectiveness of the technique on the level of additional damping can be achieved.

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Author Biographies

Jhon Jairo Gil-Peláez, Universidad Santo Tomás Bucaramanga
Ph.D. Civil Engineering
Luis Suárez, University of Puerto Rico Mayagüez
Ph.D. Engineering Mechanics

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Published
2016-09-22
Section
Research and Innovation Articles