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/306162
Cast-in-place concrete taxiway at Tampa International Airport creates smoother access for world's largest aircraft Executives at the Tampa International Airport wanted to provide better access between runways for all types of airport vehicles. Those requirements meant creating a bridge that could accommodate airplanes including the Airbus A380, the largest (and heaviest) passenger aircraft in the world. To meet the variety of goals, the design and construction team created a 227-ft 6-in.-long cast-in-place, post-tensioned concrete bridge. Constraints of time and geometry created a challenging design project. The Taxiway B Bridge, a fast-track design-build project, is part of a new $950-million terminal complex partially funded by the American Recovery and Reinvestment Act. The bridge allows aircraft to move between the main north-south runways. Spanning a new access way that includes vehicular traffic as well as a future light rail system and utility corridors, the bridge features three spans that are 97 ft 3 in., 94 ft 3 in., and 36 ft 0 in. in length. To ensure safe movement of the world's largest aircraft, the bridge is nearly as wide as it is long, at 217 ft 6 in. for a single aircraft travel lane. To meet the low taxiway grade requirements as well as underlying roadway profile and vertical-clearance requirements, a shallow superstructure depth varying from 3 ft 3 in. to 5 ft 0 in. was necessary for the main spans. T h e b r i d g e w a s d e s i g n e d u s i n g the AASHTO LRFD Bridge Design Specifications, supplemented by the Florida Department of Transportation's Structures Design Guidelines and aircraft design loads specified by the Hillsborough County Aviation Authority. The structure was designed to carry the Boeing 747, Boeing 777, and the Airbus A380. In addition to the extreme vertical loads produced by these aircraft, the bridge was also designed to resist 70% profile TAMPA INTERNATIONAL AIRPORT TA x IWAY B BRIDGE/ TAMPA , FLORIDA E NGINEER: FINLEY Engineering Group, Tallahassee, Fla. PRIME CONTRACTOR: Hubbard Construction Co., Winter Park, Fla. POST-TENSIONING SUPPLIER: VSL, Hanover, Md. C ONCRETE SUPPLIER: CEMEX, Largo, Fla. by Jerry M. Pfuntner and Robert A. Alonso, FINLEY Engineering Group heavy-duty Runway access The 227-ft 6-in.-long Taxiway B Bridge at the Tampa International Airport features a post-tensioned, cast-in-place concrete superstructure that is 217 ft 6 in. wide, making it nearly as wide as it is long. It had to accommodate a variety of large airplanes, including the Airbus A380, the largest and heaviest passenger aircraft in the world. Photos: Aerial Innovations Inc., Tampa, Fla., and Hubbard Construction Company. 28 | ASPIRE , Winter 2011 Book_Win11.indb 28 1/4/11 2:34 PM