Validation of a strategy to predict secant shear modulus and damping of soils with an elastoplastic model

2015 ◽  
Vol 20 (2) ◽  
pp. 609-622 ◽  
Author(s):  
Rui Carrilho Gomes ◽  
Jaime A. Santos ◽  
Arézou Modaressi-Farahmand Razavi ◽  
Fernando Lopez-Caballero
Keyword(s):  
Shear Modulus ◽  
Elastoplastic Model ◽  
Secant Shear Modulus

On the Use of Power Laws in Stress Analysis Beyond the Elastic Range

1947 ◽  
Vol 14 (4) ◽  
pp. A281-A284
Author(s):  
Alice Winzer ◽  
W. Prager
Keyword(s):  
Plastic Deformation ◽  
Shear Modulus ◽  
Stress Analysis ◽  
Power Laws ◽  
Shearing Stress ◽  
Great Caution ◽  
Elastic Range ◽  
Secant Shear Modulus

Abstract In a recent paper A. A. Ilyushin drew attention to the remarkable simplicity which the theory of plastic deformation assumes when the secant shear modulus is taken as a power of the octahedral shearing stress. In the present paper Ilyushin’s results are discussed in connection with a specific example and it is shown that great caution is indicated in the use of such power laws.

Effects of gravel content on liquefaction resistance and its assessment considering deformation characteristics in gravel – mixed sand

2019 ◽  
Vol 56 (12) ◽  
pp. 1743-1755
Author(s):  
Hirofumi Toyota ◽  
Susumu Takada
Keyword(s):  
Shear Modulus ◽  
Small Strain ◽  
Bender Element ◽  
Liquefaction Resistance ◽  
Liquefaction Potential ◽  
Shear Moduli ◽  
Linear Elastic ◽  
Undisturbed Samples ◽  
Strong Relation ◽  
Secant Shear Modulus

Many reports describe overestimation of liquefaction resistance based on sounding data related to ground materials containing coarse particles such as gravel and cobbles. Better methods of liquefaction potential estimation must be developed using investigation data other than those from sounding. Gathering perfect and undisturbed samples is difficult, but using seismic methods such as PS logging might be effective for assessing liquefaction potential. For this study, bender element (BE) tests and local small strain (LSS) tests were conducted, respectively, to measure the dynamic and static shear moduli of gravel – mixed sand specimens. Subsequently, relations between liquefaction strength and secant shear moduli were examined to provide reliable estimation of liquefaction in gravel – mixed sand. Although the liquefaction resistance increased considerably with overconsolidation, the initial shear modulus exhibited only a slight change with the same overconsolidation. The experimentally obtained results elucidated that the important shear strain level, for which secant shear modulus has a strong relation with liquefaction strength, was not a linear elastic region of 0.001%: it was about 0.01%.

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