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A displacement-based seismic design procedure for buildings with fluid viscous dampers

  • Banuelos-Garcia, Francisco H. (Instituto de Ingenieria, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria) ;
  • Ayala, Gustavo (Instituto de Ingenieria, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria) ;
  • Lopez, Saul (Facultad de Estudios Superiores de Acatlan, UNAM)
  • Received : 2019.10.04
  • Accepted : 2019.12.20
  • Published : 2020.05.25

Abstract

This paper presents a displacement-based seismic design procedure for new structures with fluid viscous dampers and/or for existing structures, where these devices are required as a retrofit measure and damage control. To consider the non-proportional damping produced by these devices in a conventional modal spectral analysis, the effect of the fluid viscous dampers is approximated as the sum of a proportional damping matrix and a complementary matrix which is representative of non-proportional damping matrix. To illustrate the application of this procedure and evaluate the performance of structures designed with the procedure proposed, five regular plane frames: 8, 12, 17, 20 and 25-storey, and an 8-storey building are designed. The seismic demands used for design and validation were the records obtained at the SCT site during the 1985 Michoacan earthquake, and that of the 2017 Morelos - Puebla earthquake obtained at the Culhuacan site, both stations located on soft soil sites. To validate the procedure proposed, the performances and damage distributions used as design targets were compared with the corresponding results from the nonlinear step-by-step analyses of the designed structures subjected to the same seismic demands.

Keywords

Acknowledgement

This research was sponsored by the National Council of Science and Technology (CONACyT), through the Basic Science project number 221526 entitled "Development and Validation of a New Approach for the Multi-Level Displacement-Based Seismic Evaluation and Design of Structures with Damage Control". This research was also possible thanks to the graduate CONACyT scholarships of the junior authors.

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