Wu, Jun, authorChen, Suren, 1973-, advisorVan de Lindt, John W., committee memberHeyliger, Paul Roy, 1958-, committee memberSakurai, Hiroshi, committee member2007-01-032007-01-032010http://hdl.handle.net/10217/44880Long-span bridges generally serve as the significant hub in the transportation system for normal transportation and critical evacuation paths when any disaster happens. Thus, the safety and serviceability of long-span bridges are related to huge economic cost and safety of thousands of lives. The objective of this research is to establish a general framework to evaluate the lifetime performance of long-span bridges through taking account of more realistic load situations, such as traffic flow and wind environment. After some background information is introduced in Chapter 1, Chapter 2 covers the modeling of stochastic traffic flow for the bridge infrastructure system in a more realistic way by using the Cellular Automaton model. Based on the detailed information of individual vehicles of the stochastic traffic flow, the general framework to study Bridge/Traffic/Wind dynamic performance is developed in Chapter 3. Chapter 3 and Chapter 4 also report the results of the bridge's serviceability under normal and extreme loads events, respectively. In Chapter 5, the scenario-based fatigue model is further developed based on the dynamic framework developed in Chapter 3. Finally, the reliability-based analysis is conducted in Chapter 6 to study the fatigue damage caused by the coupling effects among bridge, traffic flow and wind throughout the bridge's service life.born digitaldoctoral dissertationsengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.reliabilityfatigueequivalent dynamic wheel loading approachcellular automaton traffic modelbridge/traffic/wind interactionLong-span bridges -- United States -- TestingLong-span bridges -- United States -- Design and constructionLong-span bridges -- United States -- ReliabilitySafety factor in engineeringStructural control (Engineering)Text