Accession Number PB2013-100412
Title Rapid Construction of Pacific Street Bridge with 0.7 inch Strands October, 2010.
Publication Date Oct 2010
Media Count 158p
Personal Author G. Morcous K. Hanna M. Tadros
Abstract The Pacific Street Bridge over 1-680 in Omaha, NE is the first bridge in the United States to use 0.7-in.-diameter prestressing strands in pretensioned concrete girders. This project was funded by FHW A through NDOR under the Innovative Bridge Research and Deployment (IBRD) program. The bridge construction was completed in August 2008 as a replacement to an existing bridge. The old bridge was 74-ft-wide and had four spans that were 44-ft 6-in. 73-ft, 73-ft 6-in., and 30-ft long. Each span consisted of 11 steel I-girders at 7-ft spacing. The new bridge consists of two identical spans, 98-ft-Iong each with 17 deg. skew angle. The bridge has six traffic lanes with a total width of 105 ft 8 in. (32.2 m). The bridge superstructure consists of twenty NU900 I-girders (ten for each span) that are 35.4 in.-deep and spaced at 10-ft, 8 in. Each girder was pretensioned using thirty 0.7-in.diameter strands that are spaced at 2 in. horizontal spacing and 2.5 in. vertical spacing. Since the design and production of the bridge girders were completed before the successful testing of a girder with 2 in. by 2 in. spacing, that optimal spacing was not allowed on this bridge. This report presents the testing of second and third generations of threaded rod continuity systems. The negative moment area (over the pier) using progressively simplified reinforcement details was tested twice, as labeled 'second generation' and 'third generation' threaded rod connection details. The details show excellent performance with little extra details compared to conventional continuous-for-live-Ioad details. Under this threaded rod system, superior long term performance at an optimum cost is achieved.
Keywords Bridge construction
Bridge girders
Bridges
Concrete
Pretensioned concrete girders


 
Source Agency Federal Highway Administration
NTIS Subject Category 50C - Construction Equipment, Materials, & Supplies
50A - Highway Engineering
89C - Construction Management & Techniques
89G - Construction Materials, Components, & Equipment
Corporate Author Nebraska Univ.-Lincoln. Dept. of Civil Engineering.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1303
Contract Number SPR-PL-1 (037) P587

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