Seismic performance assessment of steel frames with elastomeric dampers

A. Mahvashmohammadi, J. Ricles, R. Sause, B. Michael, S. Sweeney, E. Ferro

Research output: Contribution to conferencePaper

Abstract

Passive damping systems can improve the seismic performance of buildings by reducing drift and inelastic deformation demands on the primary lateral load resisting system, in addition to reducing the velocity and acceleration demands on non-structural components. Recent research by the authors shows that adding passive damper systems to steel moment resisting frames (MRFs) enables significant reductions in the steel weight of the MRFs, while enhancing the seismic performance of the structure. A new generation large scale elastomeric damper with friction was constructed by pre-compressing a high damping elastomeric material into steel tubes. Characterization tests of the damper were performed and the damper characteristics were derived for various amplitudes, temperatures and excitation frequencies. A rate dependent hysteretic model for the damper was calibrated and incorporated into OpenSees program for use in seismic response analyses of steel MRF buildings with compressed elastomeric dampers. OpenSees models of a prototype building with elastomeric dampers was then created and used to predict seismic performance. The results from the study indicate that the new generation elastomeric damper enables a structure with a reduced strength of 75% of the design base shear to achieve a high level of performance with controlled story drift and minimal member damage under the DBE and MCE hazard levels. The collapse resistance is also shown to be adequate.

Original languageEnglish (US)
DOIs
StatePublished - 2014
Event10th U.S. National Conference on Earthquake Engineering: Frontiers of Earthquake Engineering, NCEE 2014 - Anchorage, United States
Duration: Jul 21 2014Jul 25 2014

Other

Other10th U.S. National Conference on Earthquake Engineering: Frontiers of Earthquake Engineering, NCEE 2014
CountryUnited States
CityAnchorage
Period7/21/147/25/14

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

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    Mahvashmohammadi, A., Ricles, J., Sause, R., Michael, B., Sweeney, S., & Ferro, E. (2014). Seismic performance assessment of steel frames with elastomeric dampers. Paper presented at 10th U.S. National Conference on Earthquake Engineering: Frontiers of Earthquake Engineering, NCEE 2014, Anchorage, United States. https://doi.org/10.4231/D3Q814S8M