Resumo

ALVAREZ, Juan C.; GUERRERO, Héctor; TERAN, Amador  e  MORENO, Ángel. Simplified method for seismic design of concrete frame buildings equipped with viscous dampers with nonlinear behaviour. Ing. sísm [online]. 2022, n.109, pp.110-146.  Epub 17-Mar-2023. ISSN 0185-092X.  https://doi.org/10.18867/ris.109.583.

This paper presents a simple method for designing structures equipped with non-linear viscous dampers. Maximum displacements of a structure are estimated using an equivalent Single-Degree-of-Freedom (SDOF) model and two displacement coefficients. The first coefficient relates the maximum displacement of a Multiple-Degree-of-Freedom (MDOF) model equipped with linear viscous dampers to that from an equivalent SDOF model. The second coefficient relates the maximum displacement of a MDOF model with non-linear viscous dampers to that from the same model equipped with linear viscous dampers. Simple equations are proposed to obtain both coefficients for various damper velocity exponents. An application example of the proposed method, consisting of a twelve-story model equipped with non-linear viscous dampers, is provided. The proposed method is validated through nonlinear dynamic analysis using several seismic ground motions. The results are discussed and conclusions are offered.

Palavras-chave : nonlinear viscous dampers; displacement-based design of buildings; simplified design method; equivalent SDOF model.