2010
03.25
03.25
Update: Mark (comment) is right that headed bars are gaining more interest in the bridge community. Here is a paper by John Stanton on rapid construction details.
Sitting in a seminar for rapid bridge construction in seismic regions, by John Stanton. (uw)
He is explaining an ABC cap/beam connection and a rapid pier design. The main point, typical of precast construction, is the lack of good connection details.
Mr. Stanton is discussing how they used 6-#18 bars to connect the pier cap to the columns. The development length was tested in the lab because the cap depth did not provide the code required development length.
He is discussing how this connection works well under sesmic loading.
Sent from iPhone
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Dear TBG,
We (Caltrans) just started a research project with P. Benson Shing at UC San Diego to obtain the development length for big diameter bars (#14s and #18s) in pile shafts. We had to figure out how to grab hold of the bars since some connectors cut into the bar causing it to fail before the full strength is reached.
Mark Y