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Article

Tensile Bending Stresses in Mortar-Grouted Riprap Revetments Due to Wave Loading

Institute of Hydraulic Engineering and Water Resources Management, RWTH Aachen University, Mies-van-der-Rohe-Str. 17, 52056 Aachen, Germany
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J. Mar. Sci. Eng. 2020, 8(11), 913; https://doi.org/10.3390/jmse8110913
Received: 7 October 2020 / Revised: 9 November 2020 / Accepted: 10 November 2020 / Published: 12 November 2020
(This article belongs to the Special Issue Modelling of Harbour and Coastal Structures)
One of the most common revetment types in Germany is the mortar-grouted riprap revetment (MGRR), which is constructed by placing riprap on a filter or separation layer and subsequent grouting with mortar. Existing technical standards and guidelines for MGRRs do not consider the interaction between dynamic wave loading and structural response. To date, scientifically sound design approaches verified by model tests are missing. Therefore, the aim of this work is to establish a process-based model for the calculation of the acting bending tensile stresses during wave attack for MGRRs to asses crack formation. To this end, MGRRs were modelled as plates on an elastic foundation (PEF). Hydraulic boundary conditions were determined with full-scale hydraulic model tests. Model parameters of the PEF model were established by investigations into the mechanical parameters of the constituents of MGRRs. The results show that tensile bending stresses are particularly dependent on the pressure difference between the top and bottom edge of the top layer, which varies significantly for MGRRs as their porosity and permeability varies significantly depending on the amount of mortar used for grouting. Enveloping functions for maximum relative tensile bending stress σx,max/(ρwgHm0) are given for four configurations of MGRRs that are of great practical relevance. View Full-Text
Keywords: mortar-grouted riprap revetment; full-scale hydraulic tests; design of revetments mortar-grouted riprap revetment; full-scale hydraulic tests; design of revetments
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MDPI and ACS Style

Kreyenschulte, M.; Schüttrumpf, H. Tensile Bending Stresses in Mortar-Grouted Riprap Revetments Due to Wave Loading. J. Mar. Sci. Eng. 2020, 8, 913. https://doi.org/10.3390/jmse8110913

AMA Style

Kreyenschulte M, Schüttrumpf H. Tensile Bending Stresses in Mortar-Grouted Riprap Revetments Due to Wave Loading. Journal of Marine Science and Engineering. 2020; 8(11):913. https://doi.org/10.3390/jmse8110913

Chicago/Turabian Style

Kreyenschulte, Moritz, and Holger Schüttrumpf. 2020. "Tensile Bending Stresses in Mortar-Grouted Riprap Revetments Due to Wave Loading" Journal of Marine Science and Engineering 8, no. 11: 913. https://doi.org/10.3390/jmse8110913

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