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Browsing by Author "Enright, Bernard"

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Characteristic Dynamic Increment for Extreme Traffic Loading Events on Short and Medium Span Highway Bridges

O'Brien, Eugene J. ; Cantero, Daniel ; Enright, Bernard ; González, Arturo (Elsevier, 2010-12)

More accurate assessment of safety can prevent unnecessary repair or replacement of existing bridges which in turn can result in great cost savings at network level. The allowance for dynamics is a significant component ...
The Effect of Lane Changing on Long-Span Highway Bridge Traffic Loading

Enright, Bernard ; Carey, Colm ; Caprani, Colin C. ; O'Brien, Eugene J. (CRC Press, 2012-07-08)

Maximum loading on long-span bridges typically occurs in congested traffic conditions. As traffic becomes congested car drivers may change lane, increasing the tendency for trucks to travel in platoons. For long-span ...
Estimation of lifetime maximum distributions of bridge traffic load effects

O'Brien, Eugene J. ; Hajializadeh, Donya ; Sheils, Emma ; Enright, Bernard (CRC Press, 2012-07-08)

This paper considers the problem of assessing traffic loading on road bridges. A database of European WIM data is used to determine accurate annual maximum distributions of load effect. These in turn are used to find the ...
Importance of the tail in truck weight modeling for bridge assessment

O'Brien, Eugene J. ; Enright, Bernard ; Getachew, Abraham (American Society of Civil Engineering (ASCE), 2010-03)

To predict characteristic extreme traffic load effects, simulations are sometimes performed of bridge loading events. To generalize the truck weight data, statistical distributions are fitted to histograms of weight ...
The Influence of Correclation on the Extreme Traffic Loading of Bridges.

O'Brien, Eugene J. ; Enright, Bernard ; Dempsey, Anthony T. (CRC Press, 2010)

Accurate traffic loading models based on measured data are essential for the accurate assessment of existing bridges. There are well-established methods for the Monte Carlo simulation of single lanes of traffic, and this ...
Management Strategies for Special Permit Vehicles for Bridge Loading

Enright, Bernard ; O'Brien, Eugene J. (2010-06-07)

An examination of weigh-in-motion (WIM) data collected recently at sites in five European countries has shown that vehicles with weights well in excess of the normal legal limits are found on a daily basis. These vehicles ...
Modeling same-direction two-lane traffic for bridge loading

O'Brien, Eugene J. ; Enright, Bernard (Elsevier, 2011-07)

Many highway bridges carry traffic in two same-direction lanes, and modeling the traffic loading on such bridges has been the subject of numerous studies. Different assumptions have been used to model multiple-presence ...
Modelling Extreme Traffic Loading on Bridges Using Kernal Density Estimators

Leahy, Cathal ; O'Brien, Eugene J. ; Enright, Bernard (Eugenides Foundation, 2011-10-13)

Kernel density estimators are a non-parametric method of estimating the probability density function of sample data. In this paper, the method is applied to find characteristic maximum daily truck weights on highway ...
Modelling of Highway Bridge Traffic Loading: Some Recent Advances

Enright, Bernard ; Caprani, Colin C. ; O'Brien, Eugene J. (CRC Press, 2011-08-01)

The accurate estimation of site-specific lifetime extreme traffic load effects is an important element in the cost-effective assessment of bridges. In recent years, the improved quality and increasing use of weigh-in-motion ...
Non-Linear Response of Structures to Characteristic Loading Scenarios

Hajializadeh, Donya ; O'Brien, Eugene J. ; Enright, Bernard ; Sheils, Emma (2012-06-17)

To assess the safety of an existing bridge, the traffic loads to which it may be subjected in its lifetime need to be accurately quantified. In this paper the 75 year characteristic maximum traffic load effects are found ...
Probabilistic study of lifetime load effect distribution of bridges

Hajializadeh, Donya ; O'Brien, Eugene J. ; Enright, Bernard ; Caprani, Colin C. ; Sheils, Emma ; Wilson, Simon P. (2012-07-02)

Assessment of highway bridge safety requires a prediction of the probability of occurrence of extreme load effects during the remaining life of the structure. While the assessment of the strength of an existing bridge ...
Site Specific Modelling of Traffic Loading on Highway Bridges

Enright, Bernard ; O'Brien, Eugene J. (BCRI, 2010-09-02)

Accurate traffic loading models based on measured weigh-in-motion (WIM) data are essential for the accurate assessment of existing bridges. Much work has been published on the Monte Carlo simulation of single lanes of ...