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Sensitivity Analysis of Nonlinear Fem
A method of sensitivity analysis is developed for nonlinear structural systems which are governed by incremental finite element equations. The formulation originates in the perturbation...

Reliability of Geometrically Nonlinear Structures
A procedure for first- and second-order, finite-element reliability analysis of geometrically nonlinear structures under static loads is presented. Structures are either linear or nonlinear...

Stochastic Finite Element Analysis of Frames with Flexible Connections
A procedure is proposed in this paper for the stochastic finite element analysis of frames with stochastic connection rigidity. A beam-column element is used to simulate the connection...

Failure Probability Estimation of Series Systems
In this paper, an approximation scheme is presented for analysis of series structural systems where no exact solution exists. If the safety indices of the individual failure functions...

Damage Accumulation Models for Bridges
In the study summarized in this paper the serviceability and ultimate limit states were reviewed for concrete and steel girder bridges. A model is proposed to evaluate strength and remaining...

Dynamic Maps for Seismic Risk Reduction and Effects of Soil Conditions
In order to perform useful vulnerability and risk evaluations, it is essential to have at one's disposal an automatic procedure of elaboration which provides answers in real time as soon...

Practical Implementation of Seismic Probabilistic Risk Assessment
Many techniques for seismic probabilistic risk assessment have been developed by university researchers over the last decade. This paper reports on a study being conducted to determine...

MA to ARMA Two-Stage Monte Carlo Simulation
A prior autoregressive (AR) model can be the basis to obtain a quite eficient and reliable subsequent autoregressive moving average (ARMA) approximation. The design of the AR system which...

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....

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...

Rehabilitation of Highway Bridges: Design and Operational Considerations
The design of a rehabilitation of a bridge which must maintain some lanes of traffic requires special consideration of construction procedures and traffic control, which are discussed...

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...

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...

Reliability Analysis of Single-Headed Anchor Bolts
Several design equations for predicting the capacity of single-headed anchor bolts embedded in plain concrete have been recommended in the United States. The capacities predicted by these...

Response of Two-Span Beam to Spatially Varying Earthquake Excitation
The effect of the spatial variation of strong ground motion should be considered in the analysis and design of large structures such as bridges, lifelines, dams, etc. The stochastic response...

Reliability of Large Structural Systems Under Time Varying Loads
Time invariant reliability analyses of structural systems are generally carried out by using the well-known failure mode approach. To include the time varying effects of loads, concepts...

Stochastic Risk Assessment for Structural Safety
Through the United States the structural safety of major and/or innovative structures has become a serious concern for engineers and to the general public. The objective of this paper...

Bayesian Updating of Seismic Fragilities of Nuclear Power Plant Components
Seismic fragility is represented by a curve of the conditiional probability of failure as a function of the peak ground acceleration. Since there are many uncertainties in the model and...

Approximate Reasoning in Engineering Decision Analysis
In this paper, the concept and methods of approximate reasoning are reviewed and discussed. The methodology of combining precise results of exact analysis, approximate solutions of exact...

Stochastic Finite Element Analysis of Railroad Tracks
The loads acting on railroad tracks due to the passage of trains and the resisting track parameters have a random character. The purpose of this study is to incorporate the random parameters...

 

 

 

 

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