Implementation of performance-based hybrid force/displacement seismic design in a building with steel frames
Journal: Journal of Building Technology DOI: 10.32629/jbt.v7i2.4068
Abstract
The Hybrid Force-Displacement (HFD) method combines the advantages of both seismic designs by applying a performance-based design approach, starting with a deformation design using these input variables. The maximum floor drifts and maximum roof displacements that exceed the elastic limit of the sections are controlled using three performance levels. Each of these levels is represented by an elastic acceleration spectrum and another elastic displacement spectrum, which are used to perform the seismic force design. The procedure involves modifying the spectrum, scaling its ordinates, and thus obtaining a representation of the three performance levels. The maximum roof responses for each performance level are thus obtained, and the respective reduction or behavior factors are then calculated. To illustrate the application of the method, a 7-story building structured with moment-resistant steel frames, located in a high seismic demand zone such as Valparaíso, Chile, was studied. The procedure is validated by applying nonlinear dynamic time history analysis using records of strong earthquakes occurring in the subduction zone.
Keywords
hybrid force-displacement method; moment frame buildings; maximum roof displacement; mezzanine drifts
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[3] AISC, "Specification for Structural Steel Buildings. AISC 360", American Institute of Steel Construction, Chicago, Estados Unidos de América, 2022
[4] NCh1537 Of86, "Diseño Estructural de Edificios – Cargas Permanentes y Sobrecargas de uso", INN, Santiago, Chile, 1986
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[8] Federal Emergency Management Agency and the National Institute of Building Sciences, "FEMA273", 1997
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[12] M.J.N. Priestley, G.M. Calvi y M.J. Kowalsky, "Displacement-Based Seismic Design of Structures" IUSS Press, Pavia, Italia, 2008
[13] American Society of Civil Engineer, ASCE/SEI, 41-17, "Seismic evaluation and retrofit of existing buildings", ASCE standard, Estados Unidos, 2013
[14] Consortium of Organizations for Strong-Motion Observation Systems (COSMOS), "Virtual Data Center", Disponible en: https://www.strongmotioncenter.org/vdc/scripts/default.plx, 2017
[15] Seismosoft Ltd., "SeismoStruct 2021 User Manual - A computer program for static and dynamic nonlinear analysis of framed structures", Disponible en: https://seismosoft.com/, 2021
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