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  • Potřeba vhodného materiálového modelu pro 3D analýzu výplňového zdiva kamenných mostů byla podnětem pro vznik tohoto příspěvku. Navržený model popisuje chování zdiva z lomového kamene na mezoskopické úrovni. Základní složky zdiva, tj. kámen a malta, jsou považovány za kvazikřehké materiály, jejichž hlavním rysem je změkčení, které se v závislosti na lomové houževnatosti obou komponent projevuje lokalizací neelastických přetvořeních především do maltových spár mezi kameny. Oproti běžným modelům, ve kterých jsou maltové spáry popsány pomocí kontaktních prvků, v námi navrženém materiálovém modelu jsou malta a kameny diskretizovány pomocí konečných prvků. Snížená soudržnost a tahová pevnost přechodové vrstvy kámen-malta jsou vystiženy kontaktními prvky založených na Mohr-Coulombově zákoně. Redukované materiálové parametry jsou stanoveny zpětnou analýzou z makroskopické tlakové zkoušky. (cs)
  • The present paper is motivated by the need of finding a suitable material model for a 3D analysis of filling masonry in stone bridges. The proposed model describes the behaviour of quarry masonry on mesostructural (mesoscopic) level. Both basic components, i.e. the stone blocks and mortar joints, are viewed as quasibrittle materials. Their basic feature is strain softening, which – in dependence on fracture toughness of both components – manifests itself by the localization of inelastic strains mainly into the mortar beds between stones. In contradiction to classical models, in which the behaviour of the mortar bed is described by means of contact elements, in the proposed model both the stones and mortar beds are discretized using finite elements. Only the reduced adhesion and tensile strength of the “stone –mortar” interface are then grasped by the contact elements and Mohr-Coulomb law.
  • The present paper is motivated by the need of finding a suitable material model for a 3D analysis of filling masonry in stone bridges. The proposed model describes the behaviour of quarry masonry on mesostructural (mesoscopic) level. Both basic components, i.e. the stone blocks and mortar joints, are viewed as quasibrittle materials. Their basic feature is strain softening, which – in dependence on fracture toughness of both components – manifests itself by the localization of inelastic strains mainly into the mortar beds between stones. In contradiction to classical models, in which the behaviour of the mortar bed is described by means of contact elements, in the proposed model both the stones and mortar beds are discretized using finite elements. Only the reduced adhesion and tensile strength of the “stone –mortar” interface are then grasped by the contact elements and Mohr-Coulomb law. (en)
Title
  • An Improved Material Model for Quarry Masonry
  • An Improved Material Model for Quarry Masonry (en)
  • Zpřesněný materiálový model pro zdivo z lomového kamene (cs)
skos:prefLabel
  • An Improved Material Model for Quarry Masonry
  • An Improved Material Model for Quarry Masonry (en)
  • Zpřesněný materiálový model pro zdivo z lomového kamene (cs)
skos:notation
  • RIV/68407700:21110/06:01122782!RIV07-MSM-21110___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(1M0579)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 464812
http://linked.open...ai/riv/idVysledku
  • RIV/68407700:21110/06:01122782
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Masonry; Material model; continuous and discontinuous modelling; homogenization; interfacial transition zone (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...i/riv/kodPristupu
http://linked.open...ontrolniKodProRIV
  • [71B0E528BE52]
http://linked.open...i/riv/mistoVydani
  • Stirling
http://linked.open...n/vavai/riv/nosic
  • neuvedeno
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Sýkora, Jan
  • Vorel, Jan
  • Šejnoha, Michal
  • Šejnoha, Jiří
https://schema.org/isbn
  • 1-905088-07-8
http://localhost/t...ganizacniJednotka
  • 21110
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