Type

Conference Proceedings

Authors

Cathal Bowe
Eugene J. O'Brien
Alan O'Connor
Cathal Leahy
Donya Hajializadeh
L. C. Connolly

Subjects

Engineering

Topics
signal adr filter vibration bridge reliability truss probabilistic daf

Calculation of the Dynamic Allowance for Railway Bridges from Direct Measurement (2016)

Abstract In a traditional deterministic assessment, a dynamic amplification factor (DAF) is applied to the static loading in order to account for dynamics. The codified DAF values are appropriately conservative in order to consider the wide range of structures and load effects to which they are applied. In the current analysis, a site specific assessment dynamic ratio (ADR) is calculated from direct measurement on an 80 year old steel truss Railway Bridge. The ADR is defined as the ratio of characteristic total stress to the characteristic static stress. The application of ADR is a relatively new concept which has rarely been considered for railway bridges. An assessment performed on the bridge in question showed a decrease in the dynamic allowance when considering the site specific ADR, corresponding to a 26% decrease in calculated stress. The measurements available were also used to derive a robust stochastic model for dynamic allowance which considered the correlation between DAF and stress level. The developed model was applied to a probabilistic assessment and resulted in a 9% increase in reliability.
Collections Ireland -> University College Dublin -> Civil Engineering Research Collection

Full list of authors on original publication

Cathal Bowe, Eugene J. O'Brien, Alan O'Connor, Cathal Leahy, Donya Hajializadeh, L. C. Connolly

Experts in our system

1
Cathal Bowe
University College Dublin
Total Publications: 6
 
2
Eugene J. O'Brien
University College Dublin
Total Publications: 192
 
3
Alan J. O'Connor
University College Dublin
Total Publications: 48
 
4
Cathal Leahy
University College Dublin
Total Publications: 17
 
5
Donya Hajializadeh
University College Dublin
Total Publications: 16