Simulation of the Rubble Mound Breakwater Response to the Underwater Explosion and Assessment of Failure Modes

Breakwaters are of great importance as coastal protection structures, but the double importance of breakwaters in our country is due to the creation of small and large shelters for different vessels. In addition, marine structures, including breakwaters, are subject to a variety of threats, includin...

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Autores principales:	سید احمد سید حسینی, Amir Fallah, mahdi adjami
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2021
Materias:	"underwater explosion" "rubble mound breakwater" "failure modes" "simulation" "fluid-structure interaction" Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/8f85851be61c421a925c189d4e27d839
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spelling	oai:doaj.org-article:8f85851be61c421a925c189d4e27d8392021-11-08T15:54:08ZSimulation of the Rubble Mound Breakwater Response to the Underwater Explosion and Assessment of Failure Modes2476-39772538-261610.22065/jsce.2019.154733.1699https://doaj.org/article/8f85851be61c421a925c189d4e27d8392021-02-01T00:00:00Zhttps://www.jsce.ir/article_82507_6e6160b6bf054cf98d56e9b56afba375.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Breakwaters are of great importance as coastal protection structures, but the double importance of breakwaters in our country is due to the creation of small and large shelters for different vessels. In addition, marine structures, including breakwaters, are subject to a variety of threats, including air, sea and submarine attacks. Therefore, attention to passive defense considerations is important in designing and operating breakwaters against threats and damage. One of the most important of these threats is the terrorist and explosive threats from the sea. In this research, the response of rubble mound breakwaters and their failure modes subjected to the underwater explosion was evaluated. Thus AUTODYN finite element software was used for the simulation and analysis of breakwater responses under the underwater blast loading. The used simulation and analysis method were the Coupling Euler-Lagrange process and explicit dynamical solving, respectively. For verification, first, the wave propagation from underwater explosion and its damaging effect on a concrete dam structure were evaluated. Then, The proposed model response of the breakwater using the software under the variation of explosive mass, water depth, event explosive depth, structure breakwater slope and size of armor layer blocks were investigated. The results showed, the greater the depth of the explosion and the shorter the scaled distance was less than 0.533 kg/m1/3, the geater the short-term damage would be. In the medium time simulation, was observed that by increasing the dimensions of concrete blocks of Armor layer from 2.4 m to 0.6 m, percentage failure decreased from 47% to 23%, and as well as for the structural slope of breakwater, with reducing the angle from 45 degrees to 26 degrees, the failure amount was reduced by about 50%. Generally, within the scope of this research, the critical explosion range was less than 8 meters from the structure.سید احمد سید حسینیAmir Fallahmahdi adjamiIranian Society of Structrual Engineering (ISSE)article"underwater explosion""rubble mound breakwater""failure modes""simulation""fluid-structure interaction"Bridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss شماره ویژه 4, Pp 152-171 (2021)
institution	DOAJ
collection	DOAJ
language	FA
topic	"underwater explosion" "rubble mound breakwater" "failure modes" "simulation" "fluid-structure interaction" Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	"underwater explosion" "rubble mound breakwater" "failure modes" "simulation" "fluid-structure interaction" Bridge engineering TG1-470 Building construction TH1-9745 سید احمد سید حسینی Amir Fallah mahdi adjami Simulation of the Rubble Mound Breakwater Response to the Underwater Explosion and Assessment of Failure Modes
description	Breakwaters are of great importance as coastal protection structures, but the double importance of breakwaters in our country is due to the creation of small and large shelters for different vessels. In addition, marine structures, including breakwaters, are subject to a variety of threats, including air, sea and submarine attacks. Therefore, attention to passive defense considerations is important in designing and operating breakwaters against threats and damage. One of the most important of these threats is the terrorist and explosive threats from the sea. In this research, the response of rubble mound breakwaters and their failure modes subjected to the underwater explosion was evaluated. Thus AUTODYN finite element software was used for the simulation and analysis of breakwater responses under the underwater blast loading. The used simulation and analysis method were the Coupling Euler-Lagrange process and explicit dynamical solving, respectively. For verification, first, the wave propagation from underwater explosion and its damaging effect on a concrete dam structure were evaluated. Then, The proposed model response of the breakwater using the software under the variation of explosive mass, water depth, event explosive depth, structure breakwater slope and size of armor layer blocks were investigated. The results showed, the greater the depth of the explosion and the shorter the scaled distance was less than 0.533 kg/m1/3, the geater the short-term damage would be. In the medium time simulation, was observed that by increasing the dimensions of concrete blocks of Armor layer from 2.4 m to 0.6 m, percentage failure decreased from 47% to 23%, and as well as for the structural slope of breakwater, with reducing the angle from 45 degrees to 26 degrees, the failure amount was reduced by about 50%. Generally, within the scope of this research, the critical explosion range was less than 8 meters from the structure.
format	article
author	سید احمد سید حسینی Amir Fallah mahdi adjami
author_facet	سید احمد سید حسینی Amir Fallah mahdi adjami
author_sort	سید احمد سید حسینی
title	Simulation of the Rubble Mound Breakwater Response to the Underwater Explosion and Assessment of Failure Modes
title_short	Simulation of the Rubble Mound Breakwater Response to the Underwater Explosion and Assessment of Failure Modes
title_full	Simulation of the Rubble Mound Breakwater Response to the Underwater Explosion and Assessment of Failure Modes
title_fullStr	Simulation of the Rubble Mound Breakwater Response to the Underwater Explosion and Assessment of Failure Modes
title_full_unstemmed	Simulation of the Rubble Mound Breakwater Response to the Underwater Explosion and Assessment of Failure Modes
title_sort	simulation of the rubble mound breakwater response to the underwater explosion and assessment of failure modes
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2021
url	https://doaj.org/article/8f85851be61c421a925c189d4e27d839
work_keys_str_mv	AT sydạḥmdsydḥsyny simulationoftherubblemoundbreakwaterresponsetotheunderwaterexplosionandassessmentoffailuremodes AT amirfallah simulationoftherubblemoundbreakwaterresponsetotheunderwaterexplosionandassessmentoffailuremodes AT mahdiadjami simulationoftherubblemoundbreakwaterresponsetotheunderwaterexplosionandassessmentoffailuremodes
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Simulation of the Rubble Mound Breakwater Response to the Underwater Explosion and Assessment of Failure Modes

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