Diseño sísmico de edificio industrial de soporte según las disposiciones de la norma NCH2369OF.2025.
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Date
2026
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Publisher
Universidad de Concepción
Abstract
El diseño sísmico de estructuras industriales en Chile adquiere especial relevancia debido a la alta actividad sísmica del país y a la necesidad de asegurar la continuidad operativa en los procesos productivos, así como proteger la seguridad de las personas en zonas de alto riesgo. En este contexto, la reciente actualización de la norma NCh236Of.2025 introduce nuevos criterios para la estimación de demanda sísmica y el diseño estructural, lo que motiva el desarrollo de este trabajo. El objetivo principal consiste en el diseño estructural de un edificio industrial de soporte para un colector de polvo, considerando la superestructura como también el sistema de fundaciones, aplicando las disposiciones de dicha normativa.
La metodología adoptada presenta las bases del diseño por capacidad e incluye la modelación estructural en SAP2000 con los distintos estados de carga y la evaluación de sismo mediante análisis modal espectral. En el diseño de fundaciones, la acción sísmica se representa mediante fuerzas estáticas equivalentes, calibradas a partir de los cortes basales del modelo, con el objetivo de reproducir el momento basal del sistema en cada dirección de análisis. El diseño se realiza bajo los enfoques LRFD y ASD, verificando los estados límite de resistencia, serviciabilidad y estabilidad, junto con el correcto dimensionamiento de elementos de hormigón armado y el sistema de anclajes.
Los resultados obtenidos muestran que la estructura cumple correctamente con los criterios normativos de resistencia y deformación. Se observa un comportamiento inelástico concentrado principalmente en diagonales de arriostramiento, concebidos como elementos fusibles, mientras que los elementos no fusibles, como columnas y fundaciones, se mantienen dentro de su rango elástico. En fundaciones se verifica el cumplimiento de tensiones máximas, estabilidad al deslizamiento y volcamiento, representado por el porcentaje de área comprimida, evidenciando un comportamiento global estable.
En conclusión, el diseño desarrollado es coherente con la filosofía del diseño por capacidad establecida en la norma vigente permitiendo un adecuado control del comportamiento estructural frente a solicitaciones sísmicas. La aplicación de la NCh2369Of.2025 demuestra ser coherente con la realidad sísmica del país, proporcionando herramientas que permiten un diseño estructural robusto y seguro, particularmente en los niveles de sobrerresistencia en estructuras industriales.
Seismic design of industrial structures in Chile is of particular importance due to the country’s high seismic activity and the need to ensure operational continuity in production processes, as well as to protect the safety of people in high-risk areas. In this context, the recent update of the NCh2369Of.2025 standard introduces new criteria for estimating seismic demand and for the structural design of an industrial support building for a dust collector, considering both the superstructure and the foundation system, in accordance with the provisions of the aforementioned standard. The adopted methodology is based on capacity design principles and includes structural modeling in SAP2000 with the corresponding load cases and seismic evaluation through modal response spectrum analysis. For the foundation design, seismic action is represented by equivalent static forces calibrated from the model’s base shear, in order to reproduce the base moment in each analysis direction. The design is carried out using both LRFD and ASD approaches, verifying ultimate limit states, serviceability, and stability, along with the proper dimensioning of reinforced concrete elements and anchorage systems. The results show that the structure meets the required strength and deformation criteria. Inelastic behavior is primarily concentrated in the bracing members, conceived as fuse elements, while non-fusible elements such as columns and foundations remain within the elastic range. For the foundations, compliance with maximum bearing stresses, sliding and overturning stability is verified, represented by the percentage of compressed area, demonstrating an overall stable behavior. In conclusion, the developed design is consistent with the capacity design philosophy established in the current standard, allowing adequate control of the structural response under seismic actions. The application of NCh2369:2025 proves to be consistent with the country’s seismic conditions, providing tools for a robust and safe structural design, particularly in terms of overstrength requirements in industrial structures.
Seismic design of industrial structures in Chile is of particular importance due to the country’s high seismic activity and the need to ensure operational continuity in production processes, as well as to protect the safety of people in high-risk areas. In this context, the recent update of the NCh2369Of.2025 standard introduces new criteria for estimating seismic demand and for the structural design of an industrial support building for a dust collector, considering both the superstructure and the foundation system, in accordance with the provisions of the aforementioned standard. The adopted methodology is based on capacity design principles and includes structural modeling in SAP2000 with the corresponding load cases and seismic evaluation through modal response spectrum analysis. For the foundation design, seismic action is represented by equivalent static forces calibrated from the model’s base shear, in order to reproduce the base moment in each analysis direction. The design is carried out using both LRFD and ASD approaches, verifying ultimate limit states, serviceability, and stability, along with the proper dimensioning of reinforced concrete elements and anchorage systems. The results show that the structure meets the required strength and deformation criteria. Inelastic behavior is primarily concentrated in the bracing members, conceived as fuse elements, while non-fusible elements such as columns and foundations remain within the elastic range. For the foundations, compliance with maximum bearing stresses, sliding and overturning stability is verified, represented by the percentage of compressed area, demonstrating an overall stable behavior. In conclusion, the developed design is consistent with the capacity design philosophy established in the current standard, allowing adequate control of the structural response under seismic actions. The application of NCh2369:2025 proves to be consistent with the country’s seismic conditions, providing tools for a robust and safe structural design, particularly in terms of overstrength requirements in industrial structures.
Description
Tesis presentada para optar al título de Ingeniero/a Civil.
Keywords
Edificios altos Diseño y construcción, Terremotos, Diseño antisísmico