Abstract Shear fuses are structural elements that protect surrounding members from damages by undergoing substantial yielding, and then are easily replaced after a major earthquake event. Butterfly-shaped shear fuse is a promising type of structural system, which can effectively align member's flexural capacity to the imposed moment demand due to its unique geometry. Although recent studies suggest that butterfly-shaped fuses exhibit substantial ductility and energy dissipation, their impact on the global performance of multi-story buildings requires further investigation. This study presents a comprehensive risk-based evaluation of a six-story eccentrically braced steel frame retrofitted with butterfly-shaped fuses. Two nonlinear finite element models of the original prototype building and retrofitted building with butterfly-shaped fuses are developed in OpenSees and incremental dynamic analysis is conducted. The results are used to derive global and story-based fragility and seismic demand hazard curves. Furthermore, earthquake-induced losses associated with structural and non-structural assemblies are quantified and the impact of butterfly-shaped fuses on the distribution of story acceleration and drift demands are evaluated. The results show that butterfly-shaped fuses significantly improve the structure's performance in terms of all drift-related damage states and the improvement is more pronounced at severe damage states. In particular, the risk of exceeding complete damage state in the retrofitted building's lifetime is reduced to approximately one-fourth of the original building's values. Furthermore, shear fuses effectively mitigate weak story formation at lower stories due to their large energy dissipation and ductility. The improved drift-related performance reduces the drift-induced loss of structural and non-structural assemblies, resulting in 44.64% smaller total annual loss for the studied building. In addition, although butterfly-shaped fuses reduce the probability of exceeding slight damage state for the floor acceleration, their impact is negligible at higher acceleration-related damage states.

中文翻译：

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装有蝶形熔断器的多层钢结构建筑的概率抗震性能及损失评价

摘要 剪力熔断器是一种结构元件，通过承受大量屈服来保护周围构件免受损坏，并且在发生大地震后很容易更换。蝶形剪切熔断器是一种很有前途的结构系统，由于其独特的几何形状，它可以有效地使构件的抗弯能力与施加的力矩需求保持一致。尽管最近的研究表明蝴蝶形保险丝具有显着的延展性和能量耗散性，但它们对多层建筑整体性能的影响需要进一步研究。本研究对装有蝴蝶形保险丝的六层偏心支撑钢框架进行了基于风险的综合评估。在OpenSees中开发了原始原型建筑和带蝶形保险丝的改造建筑的两个非线性有限元模型，并进行了增量动态分析。结果用于推导全球和基于故事的脆弱性和地震需求危险曲线。此外，量化了与结构和非结构组件相关的地震引起的损失，并评估了蝴蝶形保险丝对楼层加速度和漂移需求分布的影响。结果表明，蝶形熔断器在所有与漂移相关的损坏状态方面显着提高了结构的性能，并且在严重损坏状态下改进更为明显。尤其是改造后的建筑物超过完全损坏状态的风险 s 的寿命减少到原始建筑物价值的大约四分之一。此外，由于其大的能量耗散和延展性，剪切熔断器有效地减轻了较低楼层的薄弱层的形成。改进的漂移相关性能降低了结构和非结构组件的漂移引起的损失，从而使所研究建筑物的年总损失减少了 44.64%。此外，虽然蝶形保险丝降低了地板加速度超过轻微损坏状态的可能性，但在与加速度相关的更高损坏状态下，它们的影响可以忽略不计。改进的漂移相关性能降低了结构和非结构组件的漂移引起的损失，从而使所研究建筑物的年总损失减少了 44.64%。此外，虽然蝴蝶形保险丝降低了地板加速度超过轻微损坏状态的可能性，但它们在与加速度相关的更高损坏状态下的影响可以忽略不计。改进的漂移相关性能降低了结构和非结构组件的漂移引起的损失，从而使所研究建筑物的年总损失减少了 44.64%。此外，虽然蝶形保险丝降低了地板加速度超过轻微损坏状态的可能性，但在与加速度相关的更高损坏状态下，它们的影响可以忽略不计。