Análisis, diseño y evaluación sísmica de pórticos de acero resistentes a momento (parm) a base de planchas soldadas

Abstract

This paper describes the use of the welded unreinforced flanges – welded web (WUF-W) prequalified connection for special steel moment-frame buildings, fabricated by welded plates. Complete joint penetration groove welds are used in a welded unreinforced flanges – welded web connection in order to join the beam web and flanges to the column flanges. This connection is fully restrained and it is expected to develop enough ductile behavior in order to resist moderate and severe earthquakes. The paper describes the design procedure based on American Codes, for mid rise buildings with special resisting moment frames, and several important results are presented from the Seismic Evaluation applied to the prototype frame whose analytical model was developed in the non linear analysis program DRAIN-2DX. The Seismic Evaluation was performed by non linear lateral static analysis (pushover), and dynamic analyses from ground motions simulating two seismic levels and the seismic conditions of Ecuador.