Open AccessCONSIDERATIONS ON THE DIFFUSE SEISMICITY ASSUMPTION
Author(s) -
Jorge Daniel Riera,
Ignácio Iturrioz
Publication year - 2015
Publication title -
revista sul-americana de engenharia estrutural
Language(s) - English
Resource type - Journals
eISSN - 2316-2457
pISSN - 1806-3985
DOI - 10.5335/rsee.v12i2.4544
Subject(s) - plane (geometry) , frame (networking) , stability (learning theory) , space frame , induced seismicity , computer science , structural engineering , order (exchange) , space (punctuation) , geometry , engineering , mathematics , mechanical engineering , civil engineering , finance , machine learning , economics , operating system
Second-order effects were historically included by the effective length method (K concept). All the studies about that methodology have been developed in frame plane, with regular rectangular frames. The new way to include those effects is the use of second-order analysis, direct analysis method or alternative simplified options. This methodology was included in ANSI AISC360 in the 2005 version and in the 2010 version. As before, the studies already developed for DAM analysis are in plane. In this paper, the K concept is revisited by numerical analysis, and extended to the 3D space. Using models of symmetric and non-symmetric industrial steel structures in plane, 3D stability analyses were developed, and the results were compared with plane behavior. Several conclusions and recommendations were exposed, resulting from the analyzed models.Keywords: Second-order analyses, steel structures, irregular 3D frames.