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Probabilistic safety assessment of self-centering steel braced frame

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Abstract

The main drawback of conventional braced frames is implicitly accepting structural damage under the design earthquake load, which leads to considerable economic losses. Controlled rocking self-centering system as a modern low-damage system is capable of minimizing the drawbacks of conventional braced frames. This paper quantifies main limit states and investigates the seismic performance of self-centering braced frame using a Probabilistic Safety Assessment procedure. Margin of safety, confidence level, and mean annual frequency of the self-centering archetypes for their main limit states, including PT yield, fuse fracture, and global collapse, are established and are compared with their acceptance criteria. Considering incorporating aleatory and epistemic uncertainties, the efficiency of the system is examined. Results of the investigation indicate that the design of low- and mid-rise self-centering archetypes could provide the adequate margin of safety against exceeding the undesirable limit-states.

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Authors and Affiliations

  1. Department of Structural Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

    Navid Rahgozar & Nima Rahgozar

  2. Structural Engineering Research Center, International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran

    Abdolreza S. Moghadam

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  1. Navid Rahgozar
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  2. Nima Rahgozar
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  3. Abdolreza S. Moghadam
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Correspondence to Navid Rahgozar.

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Rahgozar, N., Rahgozar, N. & Moghadam, A.S. Probabilistic safety assessment of self-centering steel braced frame. Front. Struct. Civ. Eng. 12, 163–182 (2018). https://doi.org/10.1007/s11709-017-0384-z

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