Seismic Reliability Assessment of Aging Highway Bridge Networks with Field Instrumentation Data and Correlated Failures. II: Application

摘要

The Bridge Reliability in Networks (BRAN) methodology introduced in thecompanion paper is applied to evaluate the reliability of part of the highway bridgenetwork in South Carolina, USA, under a selected seismic scenario. The case studydemonstrates Bayesian updating of deterioration parameters across bridges afterspatial interpolation of data acquired from limited instrumented bridges. The updateddeterioration parameters inform aging bridge seismic fragility curves through multidimensionalintegration of parameterized fragility models, which are utilized toderive bridge failure probabilities. The paper establishes the correlation structureamong bridge failures from three information sources to generate realizations ofbridge failures for network level reliability assessment by Monte Carlo analysis.Positive correlations improve the reliability of the case study network, also predictedfrom the network topology. The benefits of the BRAN methodology are highlightedin its applicability to large networks while addressing some of the existing gaps inbridge network reliability studies.