Alternativa de paso peatonal de hormigón preesforzado sobre la avenida 25 de junio a nivel del centro comercial la Piazza

Abstract

The development of this project is focused on providing comfort and safety for all citizens who daily have to make a complicated and risky crossing on a main road. The purpose of this work is to design the superstructure of a pedestrian crossing with elements of prestressed concrete on the 25 June Avenue at the height of the La Piazza Shopping Center due to the difficulty pedestrians have when crossing the avenue. The total length of the bridge is 42.45 meters and a height of free passage from the carriageway to the bottom of the beam of 6 meters. The use of two double T-beams is proposed to reach that distance with an intermediate support pile to more than those found at the ends. The prestressed concrete double T-beams are each 21.175 m long, 0.75 meters high, 2.5 meters wide and each beam consists of 20 low relaxation steel tendons with a diameter of ½ inch. In addition, handrails, railings, deck, stairs and elevators were designed to favor citizens with or without disabilities. All the design criteria used were taken from the respective standards: ACI, NEVI, ASSHTO, PCI, INEN and NEC.