The cyclic behavior of normally consolidated clays is investigated by conducting a series simple shear tests on one‐dimensionally and isotropically kaolinite samples. response two types specimens are evaluated compared based performed with different stress amplitudes frequencies. stress‐strain‐pore pressure strength properties the clay samples studied procedure suggested to define yield strength. results also indicate that there threshold level below which no excess pore will develop. An...

Prediction of the dynamic performance an offshore wind turbine (OWT) requires consideration many different design parameters. Besides superstructure, OWT foundation also plays important role both functionally and financially in design. In this study, numerical analyses with a monopile are performed under wave loading that may lead to soil liquefaction around pile due cyclic stresses induced by displacements using open-source program, OpenSees. Effects properties such as diameter, embedment...

The principle of reinforced soil with fiber can be defined as a layer mass which includes randomly distributed discrete components, i.e. fibers, that supply on improvement in the engineering properties and mechanical behavior matrix.In this study, effect reinforcement shear strength parameters sand was evaluated.In order to determine unreinforced specimen, direct test conducted.While type is kept constant, various percentages polypropylene tested laboratory.The main aim find influence...

Offshore Wind Turbines (OWTs) confront different types of environmental loads during their lifetime. One the most significant is cyclic sea-wave load which affects OWT system approximate 25 years design life. This lateral can influence response because accumulated permanent displacement and excess pore water pressure generation in soil. procedure change pile-soil stiffness. However, behavior its foundations mostly studied under short-term loading, effects duration on interaction performance...

Isotropic triaxial compression tests were conducted on five different, fairly uniform sands, with mean grain sizes between 2.8 and 0.105 mm, to determine the effects of effective confining pressure, size, relative density unit membrane penetration. Volume changes due penetration determined using sand specimens identical void ratios height diameter but different sizes, surface areas, volumes. A semiempirical exponential relationship respect stress was used model penetration, results compared...

The effect of soil-monopile-structure interaction is great importance in the design offshore wind turbines (OWTs). Although sea waves play most effective role performance OWTs, coupled sea-wave loads and seismic motion on OWT system seismic-prone areas a factor that less investigated should not be ignored. In this regard, 2-D porous model based Biot’s poro-elastic theory considered to capture pore water pressure generation soil domain surrounding foundation. through comparative study for...

The present study is dedicated to investigate the SH body-as well as Love-waves propagation effects in porous media with uncertain porosity and permeability. A unified formulation of governing equations for one-dimensional (1-D) wave anisotropic porous layered media presented deterministically. uncertainties around above two cited parameters are taken into account by random fields help Monte Carlo Simulations (MCS). Random samples permeability generated according normal lognormal...

This paper is dedicated to the identification of parameters soil stratums and earthen dams from accelerometer records by inverse analysis using three kinds optimization algorithms. The first one Levenberg-Marquart (L-M) gradient-based method, second based on a genetic algorithm (G-A) process, third combines two search algorithms complete task more efficiently. efficiency studied identifying unknown multilayer profile. Then, global -local hybrid scheme applied identify profile characteristics...

Uncontrolled solid waste affects the stress-strain behavior of sand as well causes an environmental problem. In this research, effect leachate on dynamic has been studied and results were compared with clean different saturation degrees. The modified split molds at 50 mm diameter 100 height used to prepare leachate-contaminated sand. Both contaminated samples prepared by dry pluviation method. After preparation, in mold put wastewater keep for cure times. Then they installed triaxial test...

In the present study, wave equations for shear waves propagating in anisotropic fluid-saturated porous media are established order to obtain solutions terms of displacements and dispersion equation. The velocities vertical horizontal directions derived. uncertainties soil parameters due their spatial variability taken into account via Monte Carlo Simulations. results restricted effects porosity permeability on phase velocity attenuation SH addition anisotropy Love wave. Results show that...