What is the cost of permissible damage in seismic design of steel frames? Insights from surrogate model metaheuristic optimization and seismic loss assessment
[EN] According to current seismic codes, nonlinear capacity reserve can be considered for a reduction in elastic seismic forces. This trade-off enables the development of more cost-effective seismic designs; however, it also results in structural damage, leading to repair costs and environmental imp...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/229811 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/229811 |
| Access Level: | acceso abierto |
| Palabra clave: | Seismic design optimization Seismic loss assessment Whole life cost Evolutionary strategies Steel structures |
| Sumario: | [EN] According to current seismic codes, nonlinear capacity reserve can be considered for a reduction in elastic seismic forces. This trade-off enables the development of more cost-effective seismic designs; however, it also results in structural damage, leading to repair costs and environmental impacts. Evaluating whether these consequences are acceptable requires assessing if codecompliant designs are truly more economical and sustainable from a life-cycle perspective. This study proposes a methodology based on artificial intelligence algorithms for the automated generation of seismic designs that optimally satisfy user-defined ductility and drift requirements. With this methodology it is possible to produce a set of seismic designs with different dynamic behaviors, which are subsequently evaluated for economic and environmental consequences following FEMA P58 [1]. The proposed methodology was applied to a case-study mid-rise 2D steel frame, regular in plan and height, subjected to seismic demands corresponding to soft soil conditions. Five design scenarios were considered, covering low, medium, and high ductility levels with drift limits between 1 % and 3 %. Results indicate that designs with higher allowable drifts exhibited initial construction costs up to 6 % lower compared to those with more restrictive drift limits. However, from a life-cycle perspective, repair costs made the higher-drift designs up to 34 % more expensive than their more restrictive counterparts. These findings highlight the reduction of allowable drift in structures as an effective, efficient, and easily implementable regulatory strategy for achieving more economical and sustainable seismic designs. |
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