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Calibration of overtopping roughness factors for concrete armor units in non-breaking conditions using the CLASH database

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Calibration of overtopping roughness factors for concrete armor units in non-breaking conditions using the CLASH database

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dc.contributor.author Molines, Jorge es_ES
dc.contributor.author Medina Folgado, Josep Ramon es_ES
dc.date.accessioned 2016-11-15T18:43:50Z
dc.date.available 2016-11-15T18:43:50Z
dc.date.issued 2015
dc.identifier.issn 0378-3839
dc.identifier.uri http://hdl.handle.net/10251/74109
dc.description.abstract The roughness factor (γf) is a parameter used in overtopping estimators to account for the effects of armor unit geometry, the number of layers in the armor and other structural characteristics. Different values of γf for the same armors are given in the literature; however, in this study, the value of γf was calibrated for each overtopping estimator using the best available overtopping data. A methodology based on a bootstrapping technique is proposed to statistically characterize the roughness factors which best fit each formula. For each selected armor unit and overtopping formula, three percentiles (10%, 50% and 90%) of γf are given. Five sets of γf are given for five different overtopping estimators, calibrated using overtopping data from the CLASH database and additional tests with Cubipod armors in non-breaking conditions. The results indicate differences up to 20% in the optimum values of γf compared to those given in the literature. Optimum roughness factors are provided for the CLASH neural network (CLNN); the CLNN was found to be a better overtopping estimator than the other four overtopping formulas compared in this study. The γf is dependent on both the overtopping estimator and the dataset used. Armor porosity affects not only armor roughness and overtopping but also armor hydraulic stability; thus, recommended packing densities must be followed to avoid changes in porosity during lifetime. The sensitivity of the overtopping prediction to the roughness factor depends on the relative crest freeboard (Rc/Hm0); the greater the Rc/Hm0, the higher the sensitivity. es_ES
dc.description.sponsorship The authors are grateful for financial support from Spanish Ministerio de Economia y Competitividad (Grant BIA2012-33967). The first author was funded through the FPU program (Formacion del Profesorado Universitario, Grant AP2010-4366) by the Spanish Ministerio de Educacion, Cultura y Deporte. The authors also thank Debra Westall for revising the manuscript. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation Spanish Ministerio de Economía y Competitividad (Grant BIA2012-33967) es_ES
dc.relation FPU program (Formación del Profesorado Universitario, Grant AP2010-4366) by the Spanish Ministerio de Educación, Cultura y Deporte es_ES
dc.relation.ispartof Coastal Engineering es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Armor roughness es_ES
dc.subject Roughness factor es_ES
dc.subject Wave overtopping es_ES
dc.subject Mound breakwater es_ES
dc.subject Neural network es_ES
dc.subject CLASH database es_ES
dc.subject Crown wall es_ES
dc.subject EurOtop es_ES
dc.subject.classification INGENIERIA E INFRAESTRUCTURA DE LOS TRANSPORTES es_ES
dc.title Calibration of overtopping roughness factors for concrete armor units in non-breaking conditions using the CLASH database es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.coastaleng.2014.11.008
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería e Infraestructura de los Transportes - Departament d'Enginyeria i Infraestructura dels Transports es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros de Caminos, Canales y Puertos - Escola Tècnica Superior d'Enginyers de Camins, Canals i Ports es_ES
dc.description.bibliographicCitation Molines, J.; Medina Folgado, JR. (2015). Calibration of overtopping roughness factors for concrete armor units in non-breaking conditions using the CLASH database. Coastal Engineering. 96:62-70. doi:10.1016/j.coastaleng.2014.11.008 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.coastaleng.2014.11.008 es_ES
dc.description.upvformatpinicio 62 es_ES
dc.description.upvformatpfin 70 es_ES
dc.type.version info:eu repo/semantics/publishedVersion es_ES
dc.description.volume 96 es_ES
dc.relation.senia 277471 es_ES


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