title: Seismic response of 3D steel buildings considering the effect of PR connections and gravity frames.
abstract: The nonlinear seismic responses of 3D steel buildings with perimeter moment resisting frames (PMRF) and interior gravity frames (IGF) are studied explicitly considering the contribution of the IGF. The effect on the structural response of the stiffness of the beam-to-column connections of the IGF, which is usually neglected, is also studied. It is commonly believed that the flexibility of shear connections is negligible and that 2D models can be used to properly represent 3D real structures. The results of the study indicate, however, that the moments developed on columns of IGF can be considerable and that modeling buildings as plane frames may result in very conservative designs. The contribution of IGF to the lateral structural resistance may be significant. The contribution increases when their connections are assumed to be partially restrained (PR). The incremented participation of IGF when the stiffness of their connections is considered helps to counteract the no conservative effect that results in practice when lateral seismic loads are not considered in IGF while designing steel buildings with PMRF. Thus, if the structural system under consideration is used, the three-dimensional model should be used in seismic analysis and the IGF and the stiffness of their connections should be considered as part of the lateral resistance system.
authors.affiliation: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Ciudad Universitaria, Culiacán, 80040 Sinaloa, MEX, Mexico.
authors.forename: Alfredo
authors.identifier: 0000-0001-5074-1526
authors.initials: A
authors.lastname: Reyes-Salazar
authors.affiliation: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Ciudad Universitaria, Culiacán, 80040 Sinaloa, MEX, Mexico.
authors.forename: Edén
authors.identifier: 0000-0001-6402-1693
authors.initials: E
authors.lastname: Bojórquez
authors.affiliation: Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, AZ 85721, USA.
authors.forename: Achintya
authors.initials: A
authors.lastname: Haldar
authors.affiliation: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Ciudad Universitaria, Culiacán, 80040 Sinaloa, MEX, Mexico.
authors.forename: Arturo
authors.initials: A
authors.lastname: López-Barraza
authors.affiliation: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Ciudad Universitaria, Culiacán, 80040 Sinaloa, MEX, Mexico.
authors.forename: J Luz
authors.initials: JL
authors.lastname: Rivera-Salas
mesh_terms: D003252:Construction Materials / Q000592:standards*; D055866:Earthquakes; D006112:Gravitation; D021621:Imaging, Three-Dimensional / Q000592:standards*; D008962:Models, Theoretical; D033081:Shear Strength; D013232:Steel / Q000592:standards*
chemical_list: D013232:Steel