ASPIRE Fall 2012 - Aspire - The Concrete Bridge Magazine

More documents

Recommendations

Info

The fiber reinforced grating conceals all the utilities under the deck of the Rich Street Bridge. Photo: Ohio Department of Transportation District 6. Placement of the 1½-in.-thick silica fume overlay on the bridge deck. Photo: Ohio Department of Transportation District 6. 7 ksi concrete. After the closure joints were completed, the stay-in-place forms along with the tendon ducts were installed, the reinforcing steel tied, and the deck concrete was placed. When the deck concrete reached 4.5 ksi, the beam tendons were stressed and grouted. More than 240,000 ft of posttensioning strand was used in the arch and beam segments. With the beams and arch ribs fully post-tensioned, the temporary support towers were removed. Another 90,000 ft of tendon was used in the deck and stressed to 308 kips. After the post-tensioning operations were complete, the final abutment work was performed, expansion joints were welded and bolted into place, sidewalks and approach slabs were placed, and railings and final lighting were installed. “The Rich Street Bridge will provide motorists, pedestrians, and bicyclists a safer connection between Franklinton and downtown for many decades to come,” said Columbus Department of Public Service Director Mark Kelsey. “This is an investment in the future of Franklinton and the core of Columbus.” Second only to Texas, Ohio has the largest number of bridges. “We build bridges all the time in Ohio,” said Ferzan M. Ahmed, ODOT deputy director. “All of them are important, but there is something about this bridge. It carries a roadway and people, connects neighbors and neighborhoods, and is a showpiece for culture and the arts in the Midwest. That makes building the Rich Street Bridge the perfect project.” __________ C.J. Kiner is an area engineer with the Ohio Department of Transportation District 6, Columbus, Ohio. Robert Taylor, planning engineer, and Jeff Vance, construction project manager, for the Ohio Department of Transportation District 6, Columbus, Ohio, also contributed to this story. For additional photographs or information on this or other projects, visit www.aspirebridge.org and open Current Issue. Aerial photograph after the bridge deck was placed. Photo: Ohio Department of Transportation District 6. 28 | ASPIRE, Fall 2012
New Grouting Specification This specification provides minimum requirements for the selection, design, and installation of cementitious grouts and ducts for post-tensioning systems used in concrete construction. The 2012 edition includes significant updates in chloride testing, inclined tube testing, material certification requirements, prohibition of tendon flushing, pumping pressure, and personnel qualification. Available in hard copy and DRM Digital Edition at: www.post-tensioning.org/bookstore.php Your Access Advantage for Concrete Bridges QuikDeck® Suspended Access System To be successful in today’s competitive market, you need an advantage. The versatile QuikDeck® Suspended Access System’s modular platform design can be assembled from just a few basic components and engineered to fit almost any shape, structure or size. ■Designed for easy installation ■Specially-engineered modular platform decreases labor costs ■Can be “leapfrogged” to reduce equipment cost ■Professional engineering support and training on installation and removal to ensure safety ©201 2 Safway Ser vice s, LLC LC. Call us to learn more about the QuikDeck® Access Advantage. Bridge Division Toll-Free: (800) 582-9391 Fax: (518) 381-4613 Find out more at www.safway.com/aspire ASPIRE, Fall 2012 | 29
Page 1 and 2: THE CONCRETE BRIDGE MAGAZINE FALL 2
Page 3 and 4: Photo: Alfred Benesch and Company.
Page 5 and 6: ASPIRE, Spring 2012 | 3
Page 7 and 8: DESIGN CONSTRUCTION ANALYSIS ASPIRE
Page 9 and 10: see the Summer 2012 issue of ASPIRE
Page 11 and 12: to accurately create the concrete e
Page 13 and 14: fib Approach The Model Code for Ser
Page 15 and 16: Precast concrete spliced U-girders
Page 17 and 18: 3½” 3’-7” 3’-7” 5” 2½
Page 19 and 20: Epoxy-Coated reinforcing Type 205 S
Page 21 and 22: the up-station and down-station dec
Page 23 and 24: eight deck segments of the viaduct
Page 25 and 26: earth (MSE) walls to minimize the e
Page 27 and 28: 1104_Helser_usa:Layout 1 21.06.2011
Page 29: After the concrete ribbon arch desi
Page 33 and 34: Typical cross section, cast-in-plac
Page 35 and 36: AESTHETICS COMMENTARY by Frederick
Page 37 and 38: Looking north at the completed Blac
Page 39 and 40: ASPIRE, Fall 2012 | 37
Page 41 and 42: Precast segments were cast using th
Page 43 and 44: CREATE. ENHANCE. SUSTAIN. Second Pe
Page 45 and 46: Segmental Concrete Solutions by Cra
Page 47 and 48: The 120 segments in the main span o
Page 49 and 50: on detecting ASR in the field, conf
Page 51 and 52: Figure 5. Fifth Street Bridge over
Page 53 and 54: 2013 Call for Papers Abstracts due
Page 55 and 56: FREE On-Site Shotcrete Informationa
Page 57 and 58: Complete Solutions and Support for
Page 59 and 60: ASPIRE, Fall 2012 | 57
Page 61: www.holcim.us www.larsa4d.com www.m

ASPIRE Fall 2012 - Aspire - The Concrete Bridge Magazine

Create successful ePaper yourself

Delete template?

Save as template?