Abstract
Considering remarkable advancements in structural construction technology, especially in earthquake protection strategies, efficient ideas have been created so as to control the structures. One of the most common and applicable ways to control structures against earthquakes is to use yielding steel dampers, which can be simply exchanged after earthquake. In this research, the efficiency of using box and pipe HSS segments as seismic fuses in chevron braced frames is investigated. For this purpose, to evaluate these seismic fuses, 10 standard steel box and pipe profiles with different aspect ratios are adopted and vertically placed on chevron bracing system. These seismic fuses are subjected to cyclic loading and their hysteresis behavior has been examined. Through numerically studying the cyclic behavior of vertical box fuse (VBF) and vertical pipe fuse (VPF), it was concluded that VBFs with higher aspect ratio and higher cross-section demonstrate reasonable behavior in energy dissipation, and provide more stable hysteresis loops. However, VPFs with high aspect ratios encounter considerable stiffness reduction in large displacement cycles due to local buckling such that using vertical stiffeners are required to improve their behaviour. These dampers are called stiffened vertical pipe fuse (SVPF), which demonstrate a proper performance by using stiffeners on VPFs.
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Mohemmi, M., zahrai, S.M. Cyclic behavior of CBFs having vertical pipe and box fuses with different aspect ratios. Innov. Infrastruct. Solut. 7, 250 (2022). https://doi.org/10.1007/s41062-022-00849-1
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DOI: https://doi.org/10.1007/s41062-022-00849-1