SEISMIC PERFORMANCE OF EBF AND V-EBF ECCENTIALLY BRACED FRAME SYSTEM IN STEEL STRUCTURES WITH DIFFERENT HEIGHT

Reza Shahi¹ Dr.Behnam Adhami² Dr.jafar Asgari marnani³

1) Civil Engineering Masters student, Azad central Tehran Branch university, Tehran, Iran
2) Civil Engineering Assistant Professor, Azad central Tehran Branch university, Tehran, Iran
3) Civil Engineering Assistant Professor, Azad central Tehran Branch university, Tehran, Iran

IOI Code : XBFH-DKFBK
Publication : 1st. International Congress on Science, Engineering and Technology (tumconf.com/1st)
Abstract :
    Primary rigidity and proper ductility of divergent braces against high rigidity and low ductility of converge braces identifier this type of braces have suitable seismic behavior. Especially shear behavior of the link in divergent braces damping Earthquake energy and lead to other elements remain in Elastic mode, Eventually it decreases seismic demand and increases structure ductility. In this study, seismic behavior of two type of steel braced structure is evaluated. Steel braced side resistance system according to the code AISC360-10 is that one of them is divergent braces with horizontal shear link (EBF) and the other is divergent braces with verical shear link (VEBF). Each of the EBF or V-EBF has height of 4, 8 and 12 floors, so that the height of each floor is 3 meters. All research structures in tehran city and ll soil type are selected according to the code 2800. To analyze results and numeric studies used ETABS2016 v16.0.03. The results are presented as tables and charts of the period, seismic weight, story forces, basic shears and story drifts. The results showed that The period and drifts of the structures with vertical shear link is more than the structures with horizontal shear link at the same height. particularly in the case of drifts with precision in story forces and behavior comparison of both lateral restraint systems. We notice this issue that equally descripting of lateral forces of the structures with horizontal shear link has less displacement and in this respect, they have a better performance.

Keywords : eccentrically braced frame horizontal shear link vertical shear link period height performance base shear