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<p>Performance-based seismic design of post-installed fasteners is an open question since the current state-of-the-art fastener seismic qualification methods (EOTA TR 049 and ACI 355) do not provide fastener capacity information that may be used for performance-based design. The published fastener seismic capacities are not related to actual earthquakes in seismic design scenarios. The seismic qualification and assessment framework of fasteners is conceptually incorrect since its first publication in ACI 355.2–00. This framework was adopted in EOTA documents and referred in EN 1992–4:2018 and EN 1998–1–1:2024 too. To promote the development of performance-based seismic design and a related appropriate fastener qualification framework, a holistic approach is proposed that can provide transparency and opportunities for future improvements. The approach hypothesizes that seismic design scenarios of connections with post-installed fasteners may be characterised by one single simplified parameter. An energy based term, the accumulated damage potential (ADP) has been adopted for this purpose, which has been proposed in the literature for the estimation of fastener displacements in crack cycling tests. The ADP seems to be able to reflect the response of structural members at the location of connections under any earthquake action in any type of building, considering any type of non-structural component and any type of post-installed fastener. Major future work is anticipated in multiple fields to develop the new framework. This paper explores the specifics of such a development, provides a comprehensive assessment of the current status quo, and based on a gap analysis sets the direction for future research. Currently, there are no simplified methods available for designers to determine the ADP in design. Fastener capacity information is very limited in the current assessment documents and does not allow designers to perceive the real seismic capacity of fasteners or their sensitivity to different crack widths. This paper provides an outlook for future developments in seismic design and qualification, which are suitable to account for the fastener response in the relevant range of ADP and the relevant range of maximum crack widths considered in actual seismic design scenarios.</p>

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Developing a holistic approach for performance-based seismic design and related qualification of post-installed fasteners

  • 期刊论文

  • 发表日期：

    2025年8月29日

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  • Dorian Borosnyoi-Crawley

摘要

Performance-based seismic design of post-installed fasteners is an open question since the current state-of-the-art fastener seismic qualification methods (EOTA TR 049 and ACI 355) do not provide fastener capacity information that may be used for performance-based design. The published fastener seismic capacities are not related to actual earthquakes in seismic design scenarios. The seismic qualification and assessment framework of fasteners is conceptually incorrect since its first publication in ACI 355.2–00. This framework was adopted in EOTA documents and referred in EN 1992–4:2018 and EN 1998–1–1:2024 too. To promote the development of performance-based seismic design and a related appropriate fastener qualification framework, a holistic approach is proposed that can provide transparency and opportunities for future improvements. The approach hypothesizes that seismic design scenarios of connections with post-installed fasteners may be characterised by one single simplified parameter. An energy based term, the accumulated damage potential (ADP) has been adopted for this purpose, which has been proposed in the literature for the estimation of fastener displacements in crack cycling tests. The ADP seems to be able to reflect the response of structural members at the location of connections under any earthquake action in any type of building, considering any type of non-structural component and any type of post-installed fastener. Major future work is anticipated in multiple fields to develop the new framework. This paper explores the specifics of such a development, provides a comprehensive assessment of the current status quo, and based on a gap analysis sets the direction for future research. Currently, there are no simplified methods available for designers to determine the ADP in design. Fastener capacity information is very limited in the current assessment documents and does not allow designers to perceive the real seismic capacity of fasteners or their sensitivity to different crack widths. This paper provides an outlook for future developments in seismic design and qualification, which are suitable to account for the fastener response in the relevant range of ADP and the relevant range of maximum crack widths considered in actual seismic design scenarios.