Strukturální křehkost zemin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00345750" target="_blank" >RIV/68407700:21110/20:00345750 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

čeština

Název v původním jazyce

Strukturální křehkost zemin

Popis výsledku v původním jazyce

Brittleness is an important geotechnical parameter of soils as it describes the degree of reduction of the soil shear resistance after reaching the peak strength. Bishop (1967) described the soil brittleness by means of a brittleness index (IB), which is the ratio of the shear resistance loss to the peak shear strength. The IB has become a common soil parameter that is used as an indicator for the soil susceptibility to liquefaction. However, IB does not consider the rate at which the soil resistance reduces, the development of excess pore water pressure and it ignores the stress strain relationship. As a result the same IB can be calculated for a soil that collapses over a very small strain range and a soil that gradually reduces its shear resistance over extensive strain levels as long as both soils have similar peak and residual shear strengths. This paper discusses the root causes of the shear resistance loss and proposes a modification of the IB parameter to take account of the rate of the shear resistance loss, which will help to better depict the stress-strain behaviour of strain softening soils. This paper also distinguishes between Structural Brittleness and Undrained Brittleness and provides a clear definition of each to improve tailings practitioners’ comprehension.

Název v anglickém jazyce

Structural brittleness of soils

Popis výsledku anglicky

Brittleness is an important geotechnical parameter of soils as it describes the degree of reduction of the soil shear resistance after reaching the peak strength. Bishop (1967) described the soil brittleness by means of a brittleness index (IB), which is the ratio of the shear resistance loss to the peak shear strength. The IB has become a common soil parameter that is used as an indicator for the soil susceptibility to liquefaction. However, IB does not consider the rate at which the soil resistance reduces, the development of excess pore water pressure and it ignores the stress strain relationship. As a result the same IB can be calculated for a soil that collapses over a very small strain range and a soil that gradually reduces its shear resistance over extensive strain levels as long as both soils have similar peak and residual shear strengths. This paper discusses the root causes of the shear resistance loss and proposes a modification of the IB parameter to take account of the rate of the shear resistance loss, which will help to better depict the stress-strain behaviour of strain softening soils. This paper also distinguishes between Structural Brittleness and Undrained Brittleness and provides a clear definition of each to improve tailings practitioners’ comprehension.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Zakládání staveb Brno 2020

ISBN

978-80-87920-08-4

ISSN

—

e-ISSN

—

Počet stran výsledku

8

Strana od-do

23-30

Název nakladatele

Česká geotechnická společnost Českého svazu stavebních inženýrů

Místo vydání

Praha

Místo konání akce

Brno

Datum konání akce

9. 11. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—