Thermally loaded concrete specimens: fractal dimensions of fracture surface and mechanical fracture parameters

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F20%3APU136445" target="_blank" >RIV/00216305:26110/20:PU136445 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.cecem.eu/publications/monograph_research_and_modelling_in_civil_engineering_2019.pdf" target="_blank" >http://www.cecem.eu/publications/monograph_research_and_modelling_in_civil_engineering_2019.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Thermally loaded concrete specimens: fractal dimensions of fracture surface and mechanical fracture parameters

Popis výsledku v původním jazyce

The chapter deals primarily with the fractal dimension of fracture surfaces of fractured concrete specimens after temperature loading. These specimens were obtained from experimental concrete panels after extensive fire experiments. The maximum temperatures in the furnace, to which the panels were exposed from one side, were nominally 550, 600, 800 and 1000 °C. The reference specimens without temperature load were also tested. Specimens of nominal dimensions 100 × 100 × 400 mm with central edge notch 33 mm were tested in a three-point bending configuration; load versus displacement diagrams were recorded, corrected and evaluated. Each set contained 4 specimens, a total of 20 specimens were processed. The basic mechanical fracture parameters were assessed: modulus of elasticity, effective fracture toughness, and specific fracture energy. Fracture surfaces (ligaments) of all tested specimens after above mentioned three-point bending tests were analyzed in detail. Ligaments were scanned via 2D laser profilometer and the fractal dimension of selected sections of these surfaces was measured. Estimation of the fractal dimension of the fracture surface sections was performed using the walking divider method. Finally, the chapter presents the correlation among the fractal dimensions, the temperatures of concrete in different distance from the heated side and the previously obtained and above-mentioned mechanical fracture parameters.

Název v anglickém jazyce

Thermally loaded concrete specimens: fractal dimensions of fracture surface and mechanical fracture parameters

Popis výsledku anglicky

The chapter deals primarily with the fractal dimension of fracture surfaces of fractured concrete specimens after temperature loading. These specimens were obtained from experimental concrete panels after extensive fire experiments. The maximum temperatures in the furnace, to which the panels were exposed from one side, were nominally 550, 600, 800 and 1000 °C. The reference specimens without temperature load were also tested. Specimens of nominal dimensions 100 × 100 × 400 mm with central edge notch 33 mm were tested in a three-point bending configuration; load versus displacement diagrams were recorded, corrected and evaluated. Each set contained 4 specimens, a total of 20 specimens were processed. The basic mechanical fracture parameters were assessed: modulus of elasticity, effective fracture toughness, and specific fracture energy. Fracture surfaces (ligaments) of all tested specimens after above mentioned three-point bending tests were analyzed in detail. Ligaments were scanned via 2D laser profilometer and the fractal dimension of selected sections of these surfaces was measured. Estimation of the fractal dimension of the fracture surface sections was performed using the walking divider method. Finally, the chapter presents the correlation among the fractal dimensions, the temperatures of concrete in different distance from the heated side and the previously obtained and above-mentioned mechanical fracture parameters.

Druh

C - Kapitola v odborné knize

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

Research and Modelling in Civil Engineering 2019

ISBN

978-83-7365-525-6

Počet stran výsledku

24

Strana od-do

7-30

Počet stran knihy

150

Název nakladatele

Koszalin University of Technology Publishing House

Místo vydání

Koszalin

Kód UT WoS kapitoly

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