《Generalized bridge network performance analysis with correlation and time-variant reliability》.pdf

Structural Safety 33 (2011) 155–164 Contents lists available at ScienceDirect Structural Safety journal homepage: www.elsevi /locate/strusafe Generalized bridge network performance analysis with correlation and time-variant reliability Paolo Bocchini, Dan M. Frangopol ⇑ Advanced Technology for Large Structural Systems (ATLSS) Engineering Research Center, Department of Civil and Environmental Engineering, Lehigh University, 117 ATLSS Drive, Imbt Labs, Bethlehem, PA 18015-4729, USA a r t i c l e i n f o a b s t r a c t Article history: A novel approach and framework for the analysis of bridge networks is presented. The goal of the analysis Received 18 January 2010 is to assess the life-cycle performance of the network and its time-variant reliability. The proposed Received in revised form 9 February 2011 approach combines three important features that determine its ability to estimate with accuracy and Accepted 15 February 2011 robustness the reliability of a network along its life-cycle. The first one is that the reliability of the individual bridges is modeled as time-variant, due to the dete- rioration of their structural components. The network performance analysis is repeated for several time Keywords: instants, with the relative reliability of the bridges. Therefore, the network performance indicators are Bridge network