TY  - JOUR
PY  - 2017//
TI  - First-passage probability of the deflection of a cable-stayed bridge under long-term site-specific traffic loading
JO  - Advances in mechanical engineering
A1  - Lu, Naiwei
A1  - Noori, Mohammad
A1  - Liu, Yang
SP  - e1687814016687271
EP  - e1687814016687271
VL  - 9
IS  - 1
N2  - Long-span bridges suffer from higher traffic loads and the simultaneous presence of multiple vehicles, which in conjunction with the steady traffic growth may pose a threat to the bridge safety. This study presents a methodology for first-passage probability evaluation of long-span bridges subject to stochastic heavy traffic loading. Initially, the stochastic heavy traffic loading was simulated based on long-term weigh-in-motion measurements of a highway bridge in China. A computational framework was presented integrating Rice's level-crossing theory and the first-passage criterion. The effectiveness of the computational framework was demonstrated through a case study of a cable-stayed bridge. Numerical results show that the upper tail fitting of the up-crossing rate is an appropriate description of probability characteristics of the extreme traffic load effects of long-span bridges. The average daily truck traffic growth increases the probability of exceedance due to an intensive heavy traffic flow and results in a higher first-passage probability, but this increased trend is weakening as the continuous increase of the traffic volume. Since the sustained growth of gross vehicle weight has a constant impact on the probability of failure, setting a reasonable threshold overload ratio is an effective scheme as a traffic management to ensure the bridge serviceability.<p />  <p>Language: en</p>
LA  - en
SN  - 1687-8132
UR  - http://dx.doi.org/10.1177/1687814016687271
ID  - ref1
ER  -