Extended characterization of damage in rubble mound scour protections

• Type: Article in International Scientific Journal
• Date: 2020-06-01

Authors

Tiago Ferradosa (Author) FEUP; Welzel, M. (Author) Other; Schendel, A. (Author) Other; Baelus, L. (Author) Other; Paulo Rosa Santos (Author) FEUP; Francisco Taveira Pinto (Author) FEUP

Journal

Title: Coastal Engineering

Vol. 158 No. 103671

Pages: 1-13

ISSN: 0378-3839

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 30 Citations

ISI Web of Science

Scopus - 32 Citations

Scientific classification

CORDIS: Technological sciences

FOS: Engineering and technology

Other information

Authenticus ID: P-00R-TQ4

DOI: 10.1016/j.coastaleng.2020.103671

Abstract (EN): The analysis of damage in rubble mound scour protections is crucial for the armour stability assessment. Former methodologies focused on the analysis of the maximum damage number. This work introduces a complementary methodology to determine and characterize damage statistical distribution based on a flexible arrangement of sub-areas. The sub-areas are overlapping and can be varied in size, allowing a refined damage analysis. To capture the variation of damage with changing sub-area layout, the methodology is coupled with a statistical evaluation of damage numbers, which is enabled by the definition of a grid ratio between armour stone size and sub-area size, (D-n50)(2)/A(sub). The methodology is applied to high resolution bathymetric surveys from two stability tests of large-scale rip-rap scour protection around a monopile foundation and combined wave and current loading. Results show that the methodology provides a complementary understanding of damage distribution to the maximum damage acquired from previous methodologies. In addition, it allows a comparison of damage characteristics between tests despite different shapes of the foundation. Research concludes that the size of the sub-areas influences significantly the damage description. Characteristic measures as the maximum damage number and standard deviation become stable at a grid ratio (D-n50)(2)/A(sub) equal to 1/4.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13