Additional strengthening of compressed stone masonry walls

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00303572" target="_blank" >RIV/68407700:21110/16:00303572 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Additional strengthening of compressed stone masonry walls

Popis výsledku v původním jazyce

The paper presents the results the behaviour of stone masonry walls strengthened with composits strips FRP. In the case of masonry walls additionally strengthened with surface-applied non-prestressed composite strips, the stabilization and strengthening effect of FRP strips is not so unambiguously and so expressly positive, unlike the effect of column confinement, as was manifested by experimental research. The research addressed theoretical and experimental research into the reinforcement and stabilisation of brick and stone masonry walls with composite strips and composite strips with transverse anchors based on high-strength carbon fabrics placed on the surface of masonry walls at several height levels. The verified reinforcement alternatives for the case of a wall uniformly loaded along the whole length may be assessed as problematic and ineffective (risky). The “unenclosed” shape of the CFRP composite applied on the surface of walls does not allow reaching a favourable stress state of the masonry limiting and slowing down the masonry failure process due to the effect of transverse (horizontal) tensile stresses caused by contraction and the interaction of masonry units and the binder. Transverse tensile stresses decisively apply in the failure process of stone masonry under concentric loading causing the “split” of the wall. Non-prestressed FRP composite strips placed on the masonry surface increase the transverse tensile stresses in the places of the composite strip application thus contributing to this process and accelerating the failure of the wall cross section. Experimental research failed to manifest with sufficient reliability the higher load-bearing capacity of a concentrically compressed stone masonry wall reinforced with composite strips applied on the surface or in the grooves of the wall masonry.

Název v anglickém jazyce

Additional strengthening of compressed stone masonry walls

Popis výsledku anglicky

The paper presents the results the behaviour of stone masonry walls strengthened with composits strips FRP. In the case of masonry walls additionally strengthened with surface-applied non-prestressed composite strips, the stabilization and strengthening effect of FRP strips is not so unambiguously and so expressly positive, unlike the effect of column confinement, as was manifested by experimental research. The research addressed theoretical and experimental research into the reinforcement and stabilisation of brick and stone masonry walls with composite strips and composite strips with transverse anchors based on high-strength carbon fabrics placed on the surface of masonry walls at several height levels. The verified reinforcement alternatives for the case of a wall uniformly loaded along the whole length may be assessed as problematic and ineffective (risky). The “unenclosed” shape of the CFRP composite applied on the surface of walls does not allow reaching a favourable stress state of the masonry limiting and slowing down the masonry failure process due to the effect of transverse (horizontal) tensile stresses caused by contraction and the interaction of masonry units and the binder. Transverse tensile stresses decisively apply in the failure process of stone masonry under concentric loading causing the “split” of the wall. Non-prestressed FRP composite strips placed on the masonry surface increase the transverse tensile stresses in the places of the composite strip application thus contributing to this process and accelerating the failure of the wall cross section. Experimental research failed to manifest with sufficient reliability the higher load-bearing capacity of a concentrically compressed stone masonry wall reinforced with composite strips applied on the surface or in the grooves of the wall masonry.

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/DF12P01OVV037" target="_blank" >DF12P01OVV037: Progresivní neinvazivní metody stabilizace, konzervace a zpevňování historických konstrukcí a jejich částí kompozitními materiály na bázi vláken a nanovláken</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Structural Faults & Repair - 2016

ISBN

0-947644-82-2

ISSN

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e-ISSN

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Počet stran výsledku

9

Strana od-do

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Název nakladatele

Engineering Technics Press Edinburgh

Místo vydání

Edinburgh

Místo konání akce

Edinburgh

Datum konání akce

17. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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