Abstract :
By locating a steel shear panel on the intersection point of the X-braces,
concentrically or eccentrically braced shear panel (CBFSP or EBFSP) is formed. In this
paper, to perform parametric study, 1-story CBFSP and EBFSP models with span length
greater or less than height are considered. Using linear static analyses, the eects of size and
location of the shear panel on the lateral stiness of the frame with respect to the moment
resisting frame with the same member sections are investigated. Next, for 1- and 3-story
models, maximum displacement, along with base shear, and the ratio between the dissipated
energy and input energy are examined under 4 ground motion records. Behavior of the
truss elements in cross-strip model for nonlinear dynamic analyses is validated based on a
performed experimental program. The ndings show that the optimum state is achieved
by decreasing size of the shear panel and situating it in the middle of the frame or, to
some extent, upper. Furthermore, in this study, tentative values of the over-strength,
de
ection amplication, and response modication factors, which are estimated by pushover
curves, are proposed. Using linear regression, an equation is obtained for estimation of the
fundamental period of CBFSP and EBFSP.
