D. Fernández Montes). ORCID: https://orcid.org/0000-0002-8310-757X (J. Rueda Contreras); https://orcid.org/0000-0001-5900-6704 (D. Fernández Montes); https://orcid.org/0000-0002-2759-5097 (E. González Valle) RESUMENEl presente artículo profundiza en los fenómenos de estallido y exfoliación producidos en elementos pretesos, centrándose en piezas sin armadura transversal y con configuración no convencional. Partiendo de casos de patología documentados, se analizan ambos fenómenos. Se estudian los medios disponibles de predicción y evaluación de las tensiones asociadas, analizando la validez de su uso. Para este último fin, se realiza un estudio mediante Elementos Finitos, localizándose parámetros geométricos y mecánicos relevantes. Finalmente, se concluye con la exposición de puntos fundamentales para el correcto tratamiento del estallido y la exfoliación en este tipo de piezas, pero que no han sido suficientemente desarrollados en la bibliografía o en las normas y códigos aplicables.Palabras clave: Hormigón pretensado, transferencia del pretensado, prefabricado, adherencia, estallido, exfoliación, pretesado. ABSTRACTSpalling and bursting forces in prestressed concrete members are addressed in this current Manuscript. Specifically, it is focused on structural members with no conventional geometry and without transverse reinforcement. Starting out by some informed forensic cases, both forces and related tensile stresses are being analyzed. The approaches for the prediction and evaluation of these stresses are also analyzed and the validity is properly verified. For this purpose, a Finite Element Analysis is made, underlining some geometrical and mechanical parameters. Finally, technical aspects (which could be essential for the structural analysis of the spalling and bursting forces in these kind of specimens) that have not been carried out in deep in the referenced technical documents or in the current codes or specifications are highlighted.Análisis de los fenómenos de estallido y exfoliación en piezas prefabricadas pretensadas no convencionales Study of spalling and bursting forces in precast prestressed concrete elements with no conventional geometry
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