With the occurrence of higher and more frequent axle loads, bridges are more solicited by fatigue loading. Bridge elements like deck slabs are subjected to a high number of stress cycles at relatively small stress magnitudes. The application of Fracture Mechanics as a useful tool for the analysis of fatigue crack growth in steel elements was demonstrated by Paris et al. in the early 1960s. With...

This paper presents a computational framework for optimal design of non-prismatic reinforced concrete box girder bridges. The variables include the geometry of the cross section, tapered length, concrete strength and reinforcement of box girders and slabs. These are obtained by the enhanced colliding bodies optimization algorithm to optimizing the cost and again CO2 emission. Loading and design...

A key open problem in reinforcement learning is to assure convergence when using a compact hypothesis class to approximate the value function. Although the standard temporal-difference learning algorithm has been shown to converge when the hypothesis class is a linear combination of fixed basis functions, it may diverge with a general (nonlinear) hypothesis class. This paper describes the Bridg...

It is an intriguing task to develop efficient connectionist representations for learning long time series. Recurrent neural networks have great promises here. We model the learning task as a minimization problem of a nonlinear leastsquares cost function, that takes into account both one-step and multi-step prediction errors. The special structure of the cost function is constructed to build a b...

general kind of encroachment of river is constructing a bridge on it. purpose of encroachment of river is occupation part of river and flood plain for constructing bridge. often being economical of bridge innovation affirmated that most of encroachment take place to river and flood plain, which this encroachment can be in form of embankment in flood plain of river or into the main bed of river ...

A frequency response function based parameter estimation method is used for finite element model calibration of a full-scale bridge utilizing measured dynamic test data. Dynamic tests are performed on the bridge to obtain measured frequency response functions. Data quality is ensured by comparing measured data with the finite element model and removing erroneous data. A coherence data selector ...

Estimating maximum scour depth is normally required in order to determine the depth of  bridge piles. The present paper uses the SSIIM Software which considers flow and sediment equations in a three dimensional manner. The software models flow field around circular bridge pile by resolving Navier-Stokes three-dimensional equations and k-  method, and by temporary solution of flow field and cont...

Sixteen large-scale reinforced concrete specimens without web reinforcements were tested to study the behavior of typical bridge piers subjected to deflection reversals that were large enough to cause extensive yielding of the longitudinal reinforcement. The different parameters considered included shear spanto-depth ratio, percentage of longitudinal reinforcement, frequency of the applied load...