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Effect of Spatial Variation of Ground Motions on Bridges
The effect of spatial variation of ground motions on the response of a two-span bridge is presented. Perfectly and partially correlated earthquake ground motions are used as input motions...

Recursive Modeling of Dynamic Response of MDOF Systems
The dynamic response of multi-degree-of-freedom (MDOF) systems to correlated multi-input random excitations utilizing recursive modeling is presented. The recursive model is formulated...

Stochastic System Identification in Structural Dynamics
Recently, new identification methods have been developed by using the concept of optimal-recursive filtering and stochastic approximation. These methods, known as stochastic identification,...

Time Series Analysis of Wind Pressures on Low Buildings
A new methodology for the description of local wind pressures on the building envelope of mono-sloped roof buildings by using time series analysis is described. A simple AR(1) model has...

Random Vibrations of Geometrically Nonlinear Finite Element Structures
A finite element formulation combined with stochastic linearization method is developed to study the large amplitude vibration characteristics of structures subjected to random loadings....

Moments of Nonlinear Systems
In this paper the problem of writing the equations of moments of nonlinear systems excited by both external and parametric Gaussian white processes is re-examined. The classical K. Ito...

Comparison Between Linearization and Gaussian Closure
A variety of approximate solution techniques have been developed for analysis of nonlinear systems. The most widely used method has been equivalent linearization. Recently a general closure...

Stochastic Bifurcation of Nonlinear Parametric Systems
Parametrically excited systems with progressive restorings possess two different solutions: the trivial one and a stationary branching process. The second solution is physically existent...

Bridge Repairs?Unexpected Effects on Reliability
There is a significant probability that a bridge will require repairs at some time during its service life. Repairs correcting one deficiency can cause other, unanticipated problems. Awareness...

Variability Analysis of Bridge Responses Using the Semi-Continuum Method
The semi-continuum method is used for Monte Carlo simulation of a large number of bridges. It is confirmed that the mean values of responses can be obtained deterministically, and their...

EXPSYS: Offshore Structures' Expert System
This paper builds a framework of an expert system in the area of offshore structures. Expert systems, in general, are classification systems. They embody a core of knowledge about a specific...

System Reliability Using Expert Opinion
The objective of the study on which this paper is based was to determine the safe performance of several different interior gas piping systems. This paper describes the piping systems...

An Expert System for Reliability Engineering
The goal in this project is to create an expert system to do failure mode investigations from 'first principles,' or the basic understanding of the way components...

The Role of Decision Rules on Structural Safety Evaluation Systems
Three steps are involved during an assessment procedure. The first step is to make a diagnosis for possible causes of the damage, the second is to perform a qualitative evaluation including...

Importance Sampling in Structural System Reliability
In structural system reliability analysis, it is frequently necessary to resort to Monte Carlo simulation (MCS). This paper focuses on Importance Sampling, an advanced MCS method, which...

Experiences with Applications of Importance Sampling in Structural Reliability Computations
This paper presents some experiences and observations relating to the use of importance sampling in structural systems reliability computations. These are presented with three examples,...

Reliability Based Optimal Structural and Mechanical Design
A reliability based optimal design strategy has been developed. Nonlinear limit state functions and nonnormal random variables can be accommodated. For structural systems analysis, a failure...

A Kinematic Approach to Simulation-Based System Reliability Evaluation
System reliability of complex structural engineering systems is often estimated by simulation-based procedures, with failure analysis based on a static (limit state) formulation or a kinematic...

System Reliability Under Time Varying Load
The reliability of ductile and brittle structural systems under time varying loads is investigated. The formulation in the context of outcrossing of a vector process is examined. A new...

Reliability Methods for Steel Members Subjected to Axial Load and Moment
There has been a significant amount of research performed on determining the reliability of elastic-plastic frames where failure is through the formation of a plastic collapse mechanism....

 

 

 

 

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