Comments Concerning the Seismic Design of Diagonal Braced Frames According to P100-1/2013

Abstract

The present paper analyses some possibilities to improve the provisions concerning the seismic design of diagonal braced frames according to the Romanian code P100-1/2013. Three design variants were used for the dimensioning under seismic actions of a ten story concentrically braced frame, taking into consideration different contributions of the tensioned and compressed braces in carrying horizontal seismic forces. Static nonlinear analyses were performed with all the designed variants of the frame. The loading and deformation states at different steps during the analyses were compared. The distribution of plastic hinges in the structure was analyzed. A more favorable behavior of the frame during static nonlinear analysis was ensured by providing reduced cross-sections along all frame girders ends (resembling the dog-bone detail).