Análisis del desempeño estructural sísmico de un edificio de multifamiliares en acero utilizando tres sistemas estructurales: pórticos especiales a momento, pórticos arriostrados concéntricos y pórticos arriostrados excéntricos

Abstract

The current research has for first instance, the technical visit to 12 multi-familar buildings in the next citires: Quito, Ambato and Riobamba where, It was determined geometric features of the building’s structures, with this data was assigned generic features to modelate a building with three Steel structural systems that NEC-SE-AC 15 provides: Special Moment Frame, Special Concentric Braces Frames and Excentric Brace Frames, having as a result three diferent edifications wich have the same geometric features, sesmic and gravitational loads. Then using a finite element software the buildings were modeled, for design validation 8 considerations wich are in: NEC SE DS 15, ASCE/SEI 7/16, AISC 341-16 were verified, one of this considerations is the relation between capacity and demand wich was verified by the AISC 360-16; furthermore the design of all Steel elements was included considering pre qualificated conections for SMF explicit in AISC 358-16. Finally the structure performance of each stuctural system was analized using an spectrum with a rare return period (475 years) with a no linear pushover NSP, all of this was done using the FEMA 440 methodology, visualizing the level performance of each structure after a earthquake. An unitary prices analisys was included too, with the purpose of determine the final cost of each structure and making up a comparisson between the cost benefit and, the level and ponits of performance.