Site-specific live load and extreme live load models for long span
Marta Lutomirska , Andrzej S. Nowak
AbstractThe paper deals with the development of live load model for long span structures between 180 and 1500m (600 and 5000 ft). The available live load models, developed for short and medium spans, were not appropriate for long span bridges. In contrast to short and medium spans, a long span live load must include the multiple trucks being present. The developed live load model is based on traffic jam simulations with the use of newest weigh-in-motion data taken on selected bridges. It is intended to reflect current traffic patterns, quantities of trucks and their weights. The developed model confirmed that HL-93 can be used AASHTO specifications for long span bridges. The statistical parameters for live load for long span bridges are derived. The performed study revealed that sites characterized by highADTT and/or increased percentage of overloaded vehicles require the application of increased design live load.
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|Book||Deodatis G., Ellingwood B.R., Frangopol D.M. (eds.): Safety, reliability, risk and life-cycle performance of structures and infrastructures -ICOSSAR , 2013, London, CRC Press, ISBN 978-1-138-00086-5, 1054 p.|
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