Damages Of Blockwork Coastal Structures Due
To Internal Wave Impact Induced Pressures
Author(s)
R. Marth, G. Müller & G. Wolters
Abstract
During the 19th and the early 20th centuries, many coastal structures
(breakwaters and sea walls) were built from blockwork made up of natural stone
or concrete blocks. Some blockwork coastal structures that are still in use suffer
recurrent damages from wave action. It is generally assumed that wave impact
pressures enter water filled cracks and generate pressures acting inside of the
structure, causing the seaward removal of blocks. The removal of a single block
by wave impacts will disrupt the integrity of the blockwork, potentially leading
to progressive failure of the structure. In recent years, several physical model
tests have been conducted at the Queen’s University of Belfast and the Technical
University of Berlin in order to analyse the damages of blockwork coastal
structures due to internal wave impact induced pressures. In this paper an
overview of the most important results of these model tests is given. In order to
assess a structures vulnerability to pressures inside cracks, important aspects
concerning crack dimensions, ventilation of cracks and the inclination of the sea
face of a blockwork structure are presented. The results should be considered as
a basis for the definition of improved maintenance and repair strategies.
Keywords: coastal structures, breakwaters, seawalls, blockwork structures,
breaking waves, dynamic response, wave impact loads, pressure propagation.
1 Introduction
Blockwork coastal structures (breakwaters and sea walls) have a long tradition in
protection of coastlines and harbours. Blockwork structures were made up firstly
of natural stone, later concrete blocks became increasingly important. A large
Keywords
coastal structures, breakwaters, seawalls, blockwork structures,
breaking waves, dynamic response, wave impact loads, pressure propagation.
Related Book
Other papers in this volume
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