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Full-Text Articles in Engineering
More Urban Form, Fewer Auto Trips, Kelly J. Clifton
More Urban Form, Fewer Auto Trips, Kelly J. Clifton
TREC Project Briefs
Trip generation refers to the number of vehicle trips that are predicted to originate in a given zone. The Institute of Transportation Engineers (ITE) publishes standard trip generation rates for various land use types, but these rates are primarily measured in low-density suburban areas. There is national interest in building data that expands upon the existing ITE trip generation rates to include sites located in a multi-modal context.
In areas that have a more compact urban form, better access to transit and a greater mix of land uses, fewer vehicle trips may be generated there than ITE rates indicate. However, …
Making Concrete From Recycled Materials, Jason Ideker
Making Concrete From Recycled Materials, Jason Ideker
TREC Project Briefs
Making concrete out of recycled concrete aggregate, or RCA, can be a sustainable and cost-saving alternative to other aggregates. However, the quality of concrete made with RCA is dependent on the quality of the recycled material used. OTREC researchers Jason Ideker of Oregon State University and Jennifer Tanner of the University of Wyoming, with graduate student researchers Matthew P. Adams and Angela Jones, sought to determine some of the primary concerns involved with the use of RCA and to arrive at methods of assessing its durability for use in new concrete.
Alkali-silica reaction occurs in concrete over time, causing it …
Making Bridges Outlast Rising Waters, Daniel Cox
Making Bridges Outlast Rising Waters, Daniel Cox
TREC Project Briefs
During Hurricanes Ivan in 2004 and Katrina in 2005, at least 11 highway and railroad bridges along the U.S. Gulf Coast were damaged by wave forces. The spans of these bridges typically rested on bent column supports, and were attached to the supports by a variety of connection methods. Failure of these connections caused bridge spans to be washed away when the water rose high enough to lift them off. To build bridges that can withstand such forces, engineers must be able to estimate the effects the forces will have.
Investigator Daniel Cox of Oregon State University has conducted wave …
Testing And Strengthening Bridge Connections, Christopher Higgins, Peter Dusicka, Michael Scott
Testing And Strengthening Bridge Connections, Christopher Higgins, Peter Dusicka, Michael Scott
TREC Project Briefs
Researchers evaluate and improve the strength of gusset plate connections, essential pieces in bridge design that can fail due to buckling.