Resumen

REYES-HEREDIA, Henry Emmanuel et al. Proposed seismic load combination for Mexico city taking into account different soil types. Ing. sísm [online]. 2024, n.113, pp.55-80.  Epub 07-Mar-2025. ISSN 0185-092X.  https://doi.org/10.18867/ris.113.637.

This study addresses the impact of different soil types in Mexico City on the reliability and life cycle costs of reinforced concrete buildings using various proposed seismic load factors. The objective of this study is to propose the use of an optimal seismic load combination that improves the structural reliability for buildings of different levels, taking into account the life cycle costs. The methodology used is applied to reinforced concrete (R/C) buildings of 4, 6, 8, 8, 10, 12 and 15 stories located on different types of soils in Mexico City. Structural reliability and seismic performance are obtained using probabilistic methods that integrate the fragility curves and the annual exceedance rate of different damage states of the structure. To obtain the exceedance rates, artificial neural networks are used to simulate the structural demand hazard curves. A life cycle cost analysis of the structures is performed by integrating the initial cost and the costs of damage caused to the buildings in the face of possible future seismic demands. The life cycle costs obtained for the buildings designed with the building code load combinations, as well as the exceedance rates for the damage state equal to d=0.015, are compared against the costs and rates of the buildings designed with the seismic load combination of the analyzed building code. Finally, the optimal load combinations for the different soil types are obtained based on the analysis performed.

Palabras llave : concrete buildings; structural reliability; load factors; life cycle costs; artificial neural networks.

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