Proposed AASHTO LRFD Bridge Design Specifications for Light Rail Transit Loads (2017) / Chapter Skim
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2C h a p t e r 1 1.1 Background Light rail systems are an important transportation mode in many urban centers. According to the American Public Transportation Association (Parsons Brinckerhoff et al.
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Introduction 3 Figure 1.1. Light rail trains operated in Denver, CO.
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4 proposed aaShtO LrFD Bridge Design Specifications for Light rail transit Loads Most critical load conditions are determined when designing bridge structures that carry light rail transit, including dead loads, train loads, DLA, engaged forces, and their combinations. Dead loads typically encompass the self-weight of the structure, trackwork, utilities, and other fixtures.
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Introduction 5 • To propose a unified design approach for light rail transit and highway traffic loadings, and corresponding design articles and commentaries, including design examples for practitioners. 1.3 Research Approach A comprehensive study was conducted to accomplish the aforementioned research objectives, including: • State of the art review: Published research papers and design guidelines were collected and reviewed to understand the current state of light rail bridge design and to identify technical gaps to be filled by additional research.
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