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Finite Element Dynamic Reliability Analysis with Condensation
This paper presents the use of matrix condensation in stochastic finite element-based reliability analysis of structures subjected to dynamic loading, in the context of modal superposition....

Reliability of Nonlinear Frame Structures by SFEM
A method is proposed for the reliability analysis of nonlinear frame structures with flexible connections. The uncertainty of a connection is represented by a group of random moment-relative...

Evaluation of Seismic Soil Response Using Stochastic Linearization
This paper discusses the use of stochastic linearization to non-degrading soils. First, the Bouc-Wen model parameters are reviewed. Monte Carlo simulation results are compared with the...

Predicting Effects of Subsidence on Landfill Caps
Groundwater protection at unlined, closed landfills relies upon limiting cover or cap infiltration. Depressions on closed landfills indicate infiltration from reduced runoff and loss of...

Polynomial Chaos for Nonlinear Random Vibration
A new technique is presented for the solution of nonlinear random vibration problems. The technique is based on a spectral expansion of the random excitation and of the random response...

Fatigue Life Variability and Reliability Analysis of a Wind Turbine Blade
Wind turbines must withstand harsh environments that induce many stress cycles into their components. A numerical analysis package is used to illustrate the sobering variability in predicted...

Structural Reliability Analysis Methods for Implicit Performance Functions
Structural performance functions are often defined implicitly using numerical algorithms such as finite element and boundary element methods. One of the challenges in dealing with implicitly...

An Advanced First-Order Method for System Reliability
This paper proposes an iterative first-order method for accurate estimation of the joint failure region of two nonlinear limit states. Current methods use either a first-order approach...

Structural Reliability and Failure Mechanism Determination Using Monte Carlo Simulation with Variance Reduction Techniques
The objective of this paper is to present a possible method for assessing a structure's reliability and determining the collapse mechanism using Monte-Carlo simulation with variance reduction...

A Two-Stage Safety Assessment Methodology for Construction Activities
The control of construction activities requires the evaluation of the condition of the control attributes of interest. In order to develop the required methodology, a model of the construction...

Numerical Solution of the Transient Fokker-Planck Equation: The Movie
The finite element method is applied to the solution of the transient Fokker-Planck equation for several nonlinear dynamical systems in R², giving...

Reliability-Based Optimization Using Sequential Quadratic Programming
This paper proposes a method for reliability-based optimization of large structures using the Stochastic Finite Element Method, including both component and system reliabilities. In SFEM,...

Reliability Analysis of Plates with Initial Deflection by Entropy Model
Reliability analysis of postbuckling strength is discussed on rectangular plates with initial deflections whose statistical mechanism is estimated by the maximum entropy criteria. Assuming...

Critical Buckling Load Statistics of an Uncertain Column
The objective of this paper is to examine the statistics of the buckling load of a column with uncertain material properties. The elastic modulus is assumed to be a random process that...

Parameter Estimation in Complex Linear Structures
We present a new parameter estimation method which simultaneously computes element constitutive parameters and unmeasured displacements of finite element models from measured static responses....

2-D Evaporation and Root Extraction in an FEM
Two-dimensional processes of soil evaporation and moisture extraction by plant roots (horizontal and vertical) were incorporated into a saturated/unsaturated finite element model (UNSAT2)...

Holistic Approach to Irrigation Management in Developing Countries
Sound development of irrigation and drainage projects in developing countries is a continuing need to reduce hunger, environmental degradation and excess population growth; and to promote...

Ground-water Policy-making Support: USEM Optimization Modeling Plus GIS and Graphics
A support tool for ground-water management decision making involves integration of a multiobjective optimization model, GIS and graphics software. Two results are improved consideration...

An Interagency Program to Improve Irrigated Agriculture
An interagency Management Improvement Program (MIP) has been initiated to develop, apply, and evaluate the MIP methodology as a way to improve resource management and organizational effectiveness...

Highway Design in 3-D
Limitations in the flexibility and intelligence of commercial roadway design packages led Hart-Freeland-Roberts, Inc., Brentwood, TN, to write its own highway design software. From the...

 

 

 

 

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