ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.
Issue link: http://www.aspiremagazinebyengineers.com/i/306852
The bridge consists of eight precast concrete deck bulb-tee girders that were erected to close tolerances despite a variety of logistical needs. To complete a bridge superstructure replacement project on a tight dead- line, officials at the New York State Department of Transportation (NYSDOT) decided to take a new design approach: precast concrete deck bulb-tee girders. To overcome durability concerns that had kept them from using deck bulb- tee girders in the past, they customized the bulb tees to create joints between the girders that would be filled with ultra-high-performance concrete (UHPC), optimizing the system. The result was a satisfactory design with a significantly shorter construction time and will be used in additional applications. "This was the first time any of us— designers, contractors, or precasters—had used this approach in New York State," explains Mathew Royce, an engineer in the Structures Division at NYSDOT. Royce had attended sessions at bridge conventions discussing the technique. Bill Adams, vice president and project manager for the general contractor, also had researched the technique prior to bidding, talking with Washington DOT officials and contractors who had experience with constructing such bridges. The goal was to replace the super- structure on a former steel jack-arch bridge that spans the Canandaigua Outlet creek while retaining most of the cast-in-place abutments. The new bridge consists of a single-span, 87 ft 5 in. long and 42 ft 9 in. wide, comprising eight precast concrete deck bulb-tee girders that are 41 in. deep. The interior girders have a top flange 4 ft 10 in. wide while the width of the exterior girders' top flange is 5 ft 1 in. The flange is 6 in. deep at the edges. This top flange and the joint design represented the innovative aspect of this bridge technique for the project, Royce explains. "We were familiar with the deck bulb tee, but we were concerned about the longitudinal joint and its ability to stand up over a long time period with heavy traffic," he says. "We had seen it used in low-traffic applications, but this bridge already has fairly high usage, and we wanted to prepare for the future when the usage increases further. We didn't profile ROUTE 31 BRIDGE OVER CANANDAIGUA OUTLET / VILLAGE OF LYONS, WAYNE COUNTY, NEW YORK ENGINEER: New York State Department of Transportation, Albany, N.Y. PRIME CONTRACTOR: Ramsey Construction Inc., Lakeville, N.Y. CONTRACTOR'S ENGINEERING CONSULTANT: Erdman Anthony and Associates Inc., Rochester, N.Y. PRECASTER: Northeast Prestressed Products LLC, Cressona, Pa., (formally Schuylkill Products Inc.) a PCI-certified producer ULTRA-HIGH-PERFORMANCE CONCRETE SUPPLIER: Lafarge North America, Calgary, AB, Canada New York State's first application of deck bulb-tee girders results from new joint design New solutIoN UHPC Joint ProvideS by Craig A. Shutt The bridge over the Canandaigua Outlet in New York replaces a steel bridge with a precast concrete single-span bridge that used ultra- high-performance concrete to connect beams longitudinally and to speed construction. Photos: New York State DOT. 28 | ASPIRE , Fall 2009 ASPIRE_fall09.indb 28 9/11/09 2:37:43 PM