Resumo

GODINEZ DOMINGUEZ, Eber A  e  TENA COLUNGA, Arturo. Comportamiento no lineal de marcos dúctiles de concreto reforzado con contraventeo metálico chevrón: Propuesta de diseño. Ing. sísm [online]. 2011, n.85, pp.61-102. ISSN 0185-092X.

In this paper the authors summarize the results of a study devoted to evaluate, using static nonlinear analyses, the behavior of ductile moment-resisting reinforced concrete concentric braced frames structures (RC-MRCBFs) using chevron steel bracing (4 to 24 stories). RC-MRCBFs were assumed to be located in soft soil conditions in Mexico City. The study represents the first stage of a project devoted to obtain specific design parameters of this dual system as well as to evaluate a capacity design methodology adapted from the current guidelines of the Mexican Federal District Code (MFDC). From the results obtained, some design parameters for the new design of RC-MRCBFs are proponed, as equivalent story drift at yielding, peak story drifts, overstrength factors and minimum required shear strength of the columns for the lateral-load resisting system. Also, the design methodology is evaluated using a detailed study of different structural members. Finally, some comments are made respect to specific recommendations of NTCS-04.

Palavras-chave : ductile braced frames; chevron steel bracing; capacity design; design drifts; overstrength factor; structural performance.