Suarez, Diego;
Gentile, Roberto;
Galasso, Carmine;
(2023)
Surrogate modeling for risk-targeted seismic design of isolated structures using friction pendulum systems.
In:
Proceedings of Conference Earthquake Engineering and Dynamics for a Sustainable Future (SECED 2023).
Society for Earthquake and Civil Engineering Dynamics (SECED): Cambridge, UK.
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Abstract
Base isolation has been used in the last decades to provide structures with enhanced seismic performance, especially to meet the requirements of risk-critical buildings (e.g., healthcare facilities). This calls for risk-targeted design approaches that consider the explicit computation of various decision variables (e.g., expected annual loss or mean annual frequency of exceeding various damage states). Nonetheless, most of these structures are still designed following implicit risk/reliability considerations derived from building codes. The main hurdle to an explicit risk-based design is the computational effort and time required for seismic performance assessments, given the iterative nature of a typical risk/loss-based design process. This paper proposes using Gaussian-process-regression-based surrogate probabilistic seismic demand models (PSDMs) of equivalent single-degree-of-freedom systems (i.e., the probability distribution of peak horizontal displacements and accelerations on top of the isolation layer conditional on different ground-motion intensity levels) to address these challenges. This enables a risk-targeted methodology for the seismic design of low-rise structures equipped with friction pendulums that virtually requires no design iterations. First, the definition, training, and validation of the surrogate PSDMs are presented. Then, a brief description of a tentative risk-targeted procedure enabled by the proposed surrogate PSDMs is presented. The predictive power of the surrogate PSDMs is verified using a 10-fold cross-validation technique, resulting in normalised root mean square error below 3% for the parameters of the PSDMs and below 7% for their standard deviation.
| Type: | Proceedings paper |
|---|---|
| Title: | Surrogate modeling for risk-targeted seismic design of isolated structures using friction pendulum systems |
| Event: | Society for Earthquake and Civil Engineering Dynamics (SECED) 2023 conference: Earthquake Engineering and Dynamics for a Sustainable Future |
| Location: | Cambridge, United Kingdom |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://www.seced.org.uk/index.php/seced-2023-proc... |
| Language: | English |
| Additional information: | This version is the author-accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. // © The Author(s), 2023. This article is shared under a Creative Commons Attribution Non-commercial International Licence 4.0 (CC BY-NC 4.0). http://creativecommons.org/licenses/by-nc/4.0/. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Inst for Risk and Disaster Reduction |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10181125 |
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