TY - GEN
T1 - Uncertainty in determination of neutral axis of a steel stringer bridge
AU - Sigurdardottir, D.
AU - Glisic, B.
PY - 2013
Y1 - 2013
N2 - The centroid of stiffness is a universal parameter and its position in a cross-section can be evaluated for any load-carrying beam structure as a position of the neutral axis under conveniently chosen loads. Thus, a change in the position of the neutral axis within a cross-section can indicate change in the position of the centroid of stiffness, i.e., unusual structural behaviors. This paper proposes a monitoring method for steel stringer bridges based on the change in position of the neutral axis. Monitoring data from the US202/NJ23 highway overpass inWayne, NJ is used to validate the method. The results show that the neutral axis location is varying even when damage is not present. Reasons for this variation are determined and the uncertainty in the evaluation assessed. Consequently, the method presented in this paper is applicable to a large variety of typical structures.
AB - The centroid of stiffness is a universal parameter and its position in a cross-section can be evaluated for any load-carrying beam structure as a position of the neutral axis under conveniently chosen loads. Thus, a change in the position of the neutral axis within a cross-section can indicate change in the position of the centroid of stiffness, i.e., unusual structural behaviors. This paper proposes a monitoring method for steel stringer bridges based on the change in position of the neutral axis. Monitoring data from the US202/NJ23 highway overpass inWayne, NJ is used to validate the method. The results show that the neutral axis location is varying even when damage is not present. Reasons for this variation are determined and the uncertainty in the evaluation assessed. Consequently, the method presented in this paper is applicable to a large variety of typical structures.
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M3 - Conference contribution
AN - SCOPUS:84892381585
SN - 9781138000865
T3 - Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
SP - 2429
EP - 2436
BT - Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
T2 - 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
Y2 - 16 June 2013 through 20 June 2013
ER -