# On the Influence of Seismically Induced Residual Forces on Bridge Abutment Design

*The seismic design of bridge abutments depend on the anticipated movement of the abutment during the design earthquake. For seat-type abutments in which the backfill resistance can be...*

Micromechanics and Effective Properties of Elastic Particulate Composites

*A new micromechanical framework is proposed to investigate the effective mechanical properties of elastic particulate multiphase composites. Exact ensemble-volume averaged field equations...*

Damage Dependent Micromechanics in Metal Matrix Composites

*A computational approach is used herein to model the effects of processing induced thermal residual stresses on radial, hoop, and shear stresses at the fiber/matrix interface in a continuous...*

Micromechanical Characterization of Damage-Plasticity in Metal Matrix Composites

*A micromechanical theory of damage mechanics and plasticity is proposed for fiber-reinforced metal matrix composites. The composite system is assumed to consist of elastic, continuous...*

Rate-Dependent Plasticity Representation for Energy-Absorbing Materials

*A three dimensional rate-dependent plasticity constitutive model is developed for rigid polyurethane foams. In the model, the material is decomposed into skeleton and solid matrix from...*

Random Aspect of the Stress Inside Granular Media

*Micromechanics of granular media arose from the necessity of a better understanding of the relationship between the global behaviour of such materials and the physical phenomena which...*

Use of Hierarchical Lattices for Predicting the Fluid or Stress Transfer in Concrete

*Hierarchical lattices are used to study the influence of local disorder on the transfer of properties (stresses, strains, permeability) from the micro-scale to the macro-scale. They are...*

On the Diffusional Stress Transmission

*A probabilistic diffusional mechanism for the propagation of intergranular forces has been formulated as a set of three mathematical assumptions. The equilibrium equations are complemented...*

Stress Relaxation Analysis for Sealants

*A solution method for stress relaxation analysis of systems composed linear viscoelastic material in a state of plane strain is presented. The incremental, finite element method takes...*

Nonisothermal Viscoplasticity

*A nonisothermal theory of viscoplasticity is formulated for a medium subjected to finite deformation. The basic system of equations consists of the laws of conservation of linear and angular...*

Refined Analysis of Load Distribution Factors for Bridges

*This paper presents a new approach for calculating the distribution factors for slab-on-girder bridges. This method considers the coupling of longitudinal and transverse effects. The governing...*

Soil Behavior from Unconventional Loading Conditions

*Random and sinusoidal loading conditions were used in this study to determine the soil moduli and the damping ratios of cohesive soil samples. Test results showed some differences between...*

Experimental Photoelastic Analysis of Tunnels Containing Cracks

*Due to the presence of cracks the strength of the structure is decreased in the present paper an experimental two dimensional photoelastic technique has been developed to analyze the circular...*

Instability of Slopes with Nonassociated Flow

*Experimental investigations of the conditions for instability have shown that granular materials may become unstable inside the failure surface. For states of stress below the failure...*

Softening Models for Concrete: Stability and Uniqueness

*A microstructurally-based, numerically oriented, fracture-induced softening model for concrete is presented. Rate-dependent evolution equations for microcrack nucleation, growth, and coalescence...*

Neural Network Modeling of the Mechanical Behavior of Sand

*Given a set of triaxial test data, an artificial neural network (ANN) has been trained to model the mechanical behavior of a medium-to-fine sand. Once trained, the ANN was tested by simulating...*

Computer Simulation of Direct Shear Test

*This paper presents a pilot study of a computer simulation of direct shear test on sands using the Discrete Element Method. The numerical test setup is described first, which is followed...*

Improved Time-History Analysis for Structural Dynamics Calculations

*Methods are developed to reduce the computational effort in time-history analysis of nonlinear structures. The methods permit use of much larger time intervals than are possible in conventional...*

Nonlinear Geometric and Material Considerations in Shell Structures

*A geometrically and materially nonlinear static shell theory allowing large displacements, rotations, and strains with parabolic shear is developed. The theory is cast into a total Lagrangian...*

Stress Wave Interaction in Finite Beam on Elastic Foundation

*The short-time behavior of a finite Timeshenko beam on a Winkler foundation subjected to step and impulse loadings is presented. The transient behavior was analyzed by using the method...*

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