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Minimum Required Lateral Stiffness of Structures
In this paper an approximate method is presented to calculate the minimum lateral stiffness required to insure global structural stability. The technique is based on setting the critical...

Large Displacement Analysis for Structural Stability Problems
In this paper, two widely different methods of large displacement analyses are considered. The first is a discrete element analysis which is particularly effective for line structures...

Limit and Post-Limit Behavior of Space Trusses
A numerical technique for the nonlinear analysis of space trusses taking into consideration such factors as load-eccentricity, initial crookedness of the member and nonlinear stress-strain...

Applicability of Three-Parameter Power Model to Structural Analysis of Flexibly Jointed Frames
In this paper, the applicability of three-parameter power model to the practical use of design analysis for plane frame with semi-rigid connections is discussed. A three-parameter power...

Axial Force-Moment Interaction in System Reliability
For rigid-plastic structures with random resistances and loads, a technique is presented that identifies critical failure modes considering the effect of axial force-moment interaction...

An Efficient Algorithm for Second-Order Finite Element Reliability Analysis
A new, efficient algorithm for computing the principal curvatures of the limit-state surface at the design point, which are employed in second-order reliability analysis, is described....

An Adaptive Importance Sampling Strategy
An adaptive importance sampling scheme is presented. The scheme updates both the estimate of system failure probability and the importance sampling density. The sampling density used is...

Reliability of Beams on Uncertain Foundation
A two phase approach is developed to evaluate the reliability of a finite linear elastic beam subject to a random point load on uncertain elastic foundation. In phase 1, an approximate...

Two Dimensional Analysis of Strain Localization with Nonlocal Continuous Damage
This paper addresses the problem of damage localization from a theoretical stand point with a nonlocal model. Conditions for non uniqueness of the rate equations of equilibrium are derived...

Tensile Failure in Concrete by Spallation
Plate impact experiments were performed on concrete specimens to study tensile failure at high strain rates. For tensile stress pulse durations of 1.5 and 2.2 ms the threshold stress for...

On Isotropic and Anisotropic Damage Variables in Continuum Damage Mechanics
The present work analyzes the implication and limitation of some 'scalar damage' models. In particular, the elastic-damage thermodynamic potential and the 'effective...

A Kinematic Hardening and Softening Model of Concrete
In the present paper, a new loading surface calibrated by several typical uni- and multi-axial test curves is proposed. Following the associated flow rule, a relatively simple constitutive...

Inelastic Mechanisms in Dynamically Loaded Ceramics
The dynamic response of ceramic materials has been the subject of intense research in the past decade. In this paper, we succinctly describe a plate impact experiment of a star-shaped...

Computational Damage Modeling for Timber Reliability Analysis
Damage models for creep-rupture are used in conjunction with stochastic load models to evaluate lifetime failure probabilities of timber members and systems. This paper examines damage...

Cooperative Fracture?Statistical Models
The brittle failure of certain engineering materials represents but an ultimate phase in a process characterized by an evolving system of microdefects distributed over a large part of...

Numerical Solutions for Transient and Nearly Periodic Waves in Shallow Water
This paper presents a study of several numerical methods for solving transient (time-dependent) model equations for waves in shallow water by means of the method of lines. The physical...

Boundary Element Calculation of Nonlinear Wave Generation and Wave Current Interactions
A boundary element model is used to simulate the problem of nonlinear wave generation, and the interactions of wave and current. The numerical model is established based on the potential...

Extracting Dynamics from Ocean Wave Time Series Data
Recent developments in chaotic dynamics have indicated that qualitative information of a dynamical system can be extracted from the observation of a single time series as the time series...

Comparative Performance of Spectral and Parametric Numerical Wave Prediction Models in Lake Michigan
Four different numerical wave prediction models are used to hindcast wave conditions in Lake Michigan for a 10 day case in October, 1988. Results are compared to observed wave height and...

The Moving Contact Line
The flow field around the moving contact line, generated by an impulsive, horizontal motion of a vertical plate, is studied numerically. The two-dimensional, unsteady Navier-Stokes equations,...

 

 

 

 

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