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Full-Text Articles in Urban Studies and Planning
Performance Enhancement Of Bridge Bracing Under Service And Extreme Loads, Peter Dusicka, Max Taylor Stephens, Kate Fox-Lent
Performance Enhancement Of Bridge Bracing Under Service And Extreme Loads, Peter Dusicka, Max Taylor Stephens, Kate Fox-Lent
TREC Final Reports
As truck loads continue to get bigger, the demand on many aging bridges increases. Slender steel structural elements widely used in bridge superstructures and braced substructures to resist these loads are built primarily for tension, however, and can buckle under compressive loads. Portland State University associate professor Peter Dusicka set out to develop and demonstrate the concept of retrofitting bridge brace elements with fiber reinforced composites in order to provide restraint against buckling. The advanced materials consisted of a combination of fiber reinforced polymer (FRP) composite pultruded sections and wet lay-up wraps intended to be applied in the field. This …
Analysis Of Bus Collision Incidents Using Transit Its And Other Archived Operations Data, James G. Strathman, Paul Herman Wachana, Steve Callas
Analysis Of Bus Collision Incidents Using Transit Its And Other Archived Operations Data, James G. Strathman, Paul Herman Wachana, Steve Callas
TREC Final Reports
This report analyzes factors contributing to bus operations safety incidents at TriMet, the transit provider for the Portland Oregon metropolitan region. The analysis focuses on 4,631 collision and non-collision incidents that occurred between 2006 and 2009. Empirical analysis of these incidents draws on a wide array of operator-level data recovered by transit ITS technologies in combination with information from TriMet’s human resources, scheduling, and customer relations databases. Incident frequencies are estimated in relation to operators’ demographic characteristics, employment status, assigned work characteristics, service delivery and performance indicators, temporal factors, and customer information. Apart from identifying factors that are empirically related …