Site Specific Relationship for Strain Dependent Shear Modulus and Damping Using In Situ V S and High Strain Cyclic Test Results

Date

2016-08-18

Author

Zehtab, Kaveh Hassan
Yılmaz, Mustafa Tolga

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This study suggests a practical method for estimating site-specific strain dependent shear modulus and damping. The method uses in-situ shear wave velocity measurements and commercial cyclic laboratory tests on higher strains (i.e., 0.5% to 1%) in which the effect of disturbance is less significant. Shear modulus calculated using in-situ shear wave velocity and at higher cyclic shear strain, is used for building a hyperbolic relationship for shear stress and strain. Modified Masing's rule and the experimental hysteretic damping at that higher strain are used to create strain dependent damping relationship. As a result, the effects of sample disturbance on lab test results are reduced, and the number of laboratory tests decreases significantly.

Subject Keywords

Acoustic wave velocity, Conservation, Damping, Elastic moduli, Natural resources, Seismic response, Shear flow, Shear stress, Shear waves, Strain, Stress-strain curves, Wave propagation

URI

https://hdl.handle.net/11511/72216
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Department of Engineering Sciences, Conference / Seminar