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Response of Nonclassically Damped MDOF Systems to Nonstationary Random Excitation
A procedure for calculating the dynamic response of a nonclassically damped multi-degree-of-freedom (MDOF) system to nonstationary non-white vector-valued random excitation is developed...

Response Triscpectrum for a Yielding Structure
Simulation is used to obtain information about non-Gaussian aspects of the absolute response acceleration of a bilinear hysteretic oscillator with an excitation which is Gaussian white...

Adequacy of Statistical Linearization for Nonlinear Degrading Structural Systems
An investigation is carried out to examine the validity of current practice in using statistical linearization method for nonlinear degrading structures subject to random ground acceleration....

Flexural and Extensional Motion of Moderately Thick Laminated Composite Plates
A general theory of flexural and extensional motion of moderately thick laminated composite plates is developed for linear elastic materials and small deformation. Interlaminar stresses...

Visualization of the Microstructural Response of Lightly-Cemented Granular Soils Under Uniaxial Strain Conditions
The microstructural response of granular soil under uniaxial strain is being investigated through direct observation of micromotions. Two techniques are being refined to quantify individual...

Atomistic Simulation and Visualization of Thermal Disorder in a Crystalline Ice
The process of thermal disorder in crystalline ice has been simulated using a molecular dynamics model. The thermal disorder is induced by raising the temperature of the system. The molecular...

Strain Rate Effects on Pressuremeter Testing
This paper discusses the effect of strain rate on the cavity expansion problem and pressuremeter test. A cuboidal shear device, CSD, was used to perform pressuremeter strain path tests...

Instability and Plastic Flow of Soils
Materials should according to Drucker's postulate become unstable when the second increment of plastic work is negative. Experimental observations however show otherwise....

Modeling of Successive Impacts in Sand
The principal aspects of numerical modeling of successive, high energy impacts in sand are discussed in this paper. These include the numerical formulation used for solution of the equations...

Comparison of a Microscopic Model and a Macroscopic Model Predictions on the Stress-Strain Behavior of a Soil
The stress-strain behavior of a soil under drained triaxial conditions was simulated using the Microscopic constitutive model TRUBAL. The model parameters for the Macroscopic constitutive...

Microscopic Modeling of Shear Strength of Contaminated Soils
The degradation of shear strength of soils due to prolonged contamination of soils is an emerging problem. The experiments conducted at New Jersey institute of Technology showed a gradual...

A Time-Dependent Microplane Model for Creep of Cohesive Soils
The microplane model is used in this paper to describe the time-dependent (creep) behavior of cohesive soils (clays). The constitutive equations are defined on each of a set of microplanes...

Numerical Undrained Cyclic Loading Simulations Using the Discrete Element Method
Three dimensional numerical experiments on random arrays of rough spheres were performed using the discrete element method to study the behavior of granular soil and the results were compared...

Simulations of Gravity-Driven Channel Flows of Disks Floating on the Flowing Viscous Fluid
A two-dimensional discrete element model has been applied to the problem of gravity-driven channel flow of uniform disks. The particles are floating on the surface of the flowing fluid...

Interparticle Sliding and Rolling
Numerical experiments are done with a continuum plasticity program in order to study the initiation and evolution of shear bands. Many elements are used in order to resolve families of...

Scale Effects in Cone Penetration Tests
A field testing program was undertaken to examine the existence of scale effects between a miniature 1.27 cm² and 15 cm²...

Plate Load and Pressuremeter Testing in Saprolite
On the island of Oahu, Hawaii, an exploratory tunnel for the Interstate Route H-3 highway was completed in December 1989. The purpose of the exploratory tunnel was two-fold; first to locate...

In Situ Determination of Smith Soil Model Parameters for Wave Equation Analysis
A methodology for in situ determination of Smith soil model parameters for wave equation analysis is presented. The method uses a small-rod penetration test in conjunction with CAPWAPC...

Hypermedia and its Application to Geotechnical Databases
The concept of hypermedia has the potential for greatly enhancing existing database management software. In the present paper the concept of hypermedia is briefly described, the nature...

Relational Database Design and Technology
Logical and physical design of a Relational Database Management System (RDBMS) is presented with a simple geotechnical database example. Fundamental relational database design principles...

 

 

 

 

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