Numerical analysis of SRF fuse in eccentrically braced frames and determination of behavior coefficient by energy method

One of the ways to reduce damages caused by earthquakes is to concentrate the damage in predetermined members (fuses). By absorbing a major part of the earthquake force, these members minimize the damage to other members of the structure. In this article, the performance of the fuse element with simple replaceability in eccentrically braced frames is studied. The proposed fuse element consists of three steel sheets that connect the link beam to the out-of-link beam through a joint connection, in the form of tongue and pin. When the loads are repeatedly applied to the divergent frame, the fuse causes the concentration of force in the connecting beam with the occurrence of shearing action and thus dissipates the force of the earthquake. In this study, ETABS software was used for frame design and ABAQUS was used for finite element analysis. The results show that the damage was limited to the fuse section, and there was no damage to other components of the structure. Also, this system has shown similar hysteresis behavior in tension and pressure, and the coefficient of behavior of this system is higher than conventional diverging frames, which indicates better performance and malleability of this system. On the other hand, since the damage is concentrated on a relatively small element, and the connection of this member to the frame is through pins, after a large