INFLUENCE OF PROTECTIVE LAYERS ON THE RESISTANCE OF CONCRETE STRUCTURES UNDER BLAST AND IMPACT LOADING

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00384064" target="_blank" >RIV/68407700:21110/25:00384064 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.21012/FC12.1145" target="_blank" >https://doi.org/10.21012/FC12.1145</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21012/FC12.1145" target="_blank" >10.21012/FC12.1145</a>

Result language

angličtina

Original language name

INFLUENCE OF PROTECTIVE LAYERS ON THE RESISTANCE OF CONCRETE STRUCTURES UNDER BLAST AND IMPACT LOADING

Original language description

The rising threat of blast and impact events to critical infrastructure has underscored the need for advanced protective solutions to enhance the durability of structural materials. Protective layers can decrease the damage and increase the resistance of structures against such short-term dynamic loading. Different approaches are presented: dispersed fibre reinforcement and endless-fibre textile reinforcement. High-performance concrete with dispersed fibre reinforcement (HPFRC) is recognised for its exceptional strength and resistance to dynamic loading. However, its performance under blast conditions can be further improved with the addition of protective layers. This study investigates how different protective layers and their position affect the damage and structural behaviour of HPFRC subjected to blast loading. One of the protective layers is pliable and made of polyurethane, the other is stiff and made of glass/epoxy. Experiments were conducted using an explosive, placed in direct contact with the panels, to assess damage under different protective configurations. These configurations included uncoated panels, panels with one-sided stiff coatings, two-sided pliable coatings, and panels with stiff layer on one side and pliable layer on the other. On the other hand, textile-reinforced concrete (TRC) with endless carbon fibre reinforcement is used to strengthen existing structures. On the rear side of an impact-subjected structure, the textile-reinforced strengthening layer enables a membrane action and self-centering effect, reduces scabbing, and increases the perforation limit. On the impact-facing side, strengthening layers consisting of a cover layer and a damping layer decrease the impact energy induced into the concrete structure. The findings of all approaches shown in the work demonstrate the potential benefits of adding protective layers, particularly in reducing the scabbing, while also indicating that certain configurations can reduce the likelihood of full perforation. The results also reveal potential disadvantages of applying protective layers, such as increased cracking and reduced residual capacity of concrete structures.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA23-06352S" target="_blank" >GA23-06352S: Directed electromagnetic orientation of dispersed fibre reinforcement for optimal stress resistance in concrete structural members</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the 12th International Conference on Fracture Mechanics for Concrete and Concrete Structures

ISBN

978-3-903039-01-8

ISSN

—

e-ISSN

—

Number of pages

12

Pages from-to

1643-1654

Publisher name

Technische Universität Wien

Place of publication

Vídeň

Event location

Vídeň

Event date

Apr 23, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—