Noncoaxiality between Two Tensors with Application to Stress Rate Decomposition and Fabric Anisotropy Variable

The micro-fabric of deposition reflects the imprints of its geologic and stress history, its depositional environment, and its weathering history. Recent experience shows that the fabric anisotropy does influence the static and dynamic behavior of granular materials. In this study, a series of centrifuge tests are conducted to investigate the effects of fabric anisotropy on the dynamic response in the free field. The results show the acceleration, pore pressure, and residual settlement is significantly affected by the fabric anisotropy of the ground, which shows the liquefaction resistance of the ground. Meanwhile, the response of acceleration is analyzed in frequency domain, which shows that the model prepared by 90° absorbs more energy than that of 0°. To verify the effects induced by the initial fabric, permeability test are conducted and related to the liquefaction potential. The results indicate the fabric anisotropy should be incorporated into the design method.

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Fabric anisotropy and its influence on physical weathering of different types of Carrara marbles

Journal of Structural Geology ◽

10.1016/s0191-8141(00)00080-8 ◽

2000 ◽

Vol 22 (11-12) ◽

pp. 1737-1745 ◽

Cited By ~ 35

Author(s):

Bernd Leiss ◽

Thomas Weiss

Keyword(s):

Fabric Anisotropy ◽

Physical Weathering ◽

Different Types

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Quantifying and modelling fabric anisotropy of granular soils

Géotechnique ◽

10.1680/geot.2008.58.4.237 ◽

2008 ◽

Vol 58 (4) ◽

pp. 237-248 ◽

Cited By ~ 123

Author(s):

Z. X. Yang ◽

X. S. Li ◽

J. Yang

Keyword(s):

Granular Soils ◽

Fabric Anisotropy

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Constitutive modeling of artificially cemented sand by considering fabric anisotropy

Computers and Geotechnics ◽

10.1016/j.compgeo.2011.10.007 ◽

2012 ◽

Vol 41 ◽

pp. 57-69 ◽

Cited By ~ 34

Author(s):

Zhiwei Gao ◽

Jidong Zhao

Keyword(s):

Constitutive Modeling ◽

Fabric Anisotropy ◽

Cemented Sand

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ON THE EFFECT OF EFFORT REGULATION BY MEANS OF TEMPORARY CONTINUITYIN SPLIT SPAN STRUCTURES OF STEELREINFORCED CONCRETE BRIDGES

STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS ◽

10.37538/0039-2383.2021.1.58.61 ◽

2021 ◽

pp. 58-61

Author(s):

I.Yu. Belutsky ◽

◽

I.V. Lazarev ◽

Keyword(s):

Reinforced Concrete ◽

Bending Moment ◽

Concrete Bridges ◽

Stress Rate ◽

Steel Reinforced Concrete ◽

Reinforced Concrete Bridges ◽

Effort Regulation

Abstract. The publication shows the effectiveness of applying the principle of temporary continuity by combining split span structures into acontinuous couplingusing a temporary joint. The method can be viewed as an option for effort regulation, creating abearing capacity reserveinload-bearing constructions within the span structures of bridges. The calculations provided show the effect on stress rate and bending moment in split span structurescombined into a double-spancontinuous coupling by a temporary joint.

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Novel Approach for the Lifetime Prediction of Composite Materials under Static Loads

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.809.620 ◽

2019 ◽

Vol 809 ◽

pp. 620-624

Author(s):

Stefan Gloggnitzer ◽

Gerald Pilz ◽

Christian Schneider ◽

Gerald Pinter

Keyword(s):

Composite Materials ◽

Creep Rupture ◽

Stress Rate ◽

Testing Time ◽

Creep Tests ◽

Static Loads ◽

Rate Dependent ◽

R Ratio ◽

Structural Applications ◽

Load Rate

Composite materials in structural applications that are subjected to static loads for several decades tend to change material performance over their lifetime. Classical creep tests with constant static loading are quite simple tests with low demands on the test equipment. Unfortunately, these tests require uneconomically long test times, which is why a shortening of the test times with various accelerated approaches is being researched. Within this work two approaches for reduction of the testing time were investigated. On the one hand a fatigue test with the variation of R-ratio and following extrapolation to an R-ratio of 1 was done. On the other hand a Stress Rate Accelerated Creep Rupture Test (SRCR) was developed, where a defined initial stress σi is applied at the beginning of the loading process, followed by an increase load with a constant rate instead of the static stress segment of the classic creep rupture tests. Changing the load rate in several individual tests leads to stress rate-dependent fracture strengths with associated fracture times, which allows extrapolation to a fracture time at a load rate of zero. In particular, the approach of the SRCR offers great potential for greatly reducing test times with an acceptable prediction quality.

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