Abstract
Welded wide flange fuse (WWFF) is a simple metallic yielding damper which utilizes commonly available welded wide flange sections to dissipate energy through shear yielding of the steel web in the longitudinal direction. The use of welded plates makes the fabrication of WWFF simple and versatile. In this paper, advanced numerical micro- and macro- models are developed for WWFF. The models are validated using experimental results. The micro-model was developed using a thin shell finite element model. This model was used to assess the behavior of WWFFs with various slenderness and aspect ratios that were not tested experimentally. Key design parameters such as yielding force, initial stiffness, ultimate force, and ultimate deformation were simulated. The results show the WWFF has a predictable and stable hysteretic response. Since micro-models are often computationally too intensive for engineering applications, a macro-model was developed using the data from the experimental test. The hysteresis of the macro-model was also verified against the micro-model. The results show that the macro model can be used to simulate the hysteresis response of the WWFF. Hence, it can be used efficiently to analyze the nonlinear dynamic response of the structures utilizing WWFF.
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