Doubling the width of the platform of the San Pedro bridge in Spain

Torroja, José A. and Simón-Talero, José M. and Hernández, Alejandro (2011). Doubling the width of the platform of the San Pedro bridge in Spain. "PCI Journal", v. 56 (n. 3); pp. 28-42. ISSN 0887-9672.

Description

Title: Doubling the width of the platform of the San Pedro bridge in Spain
Author/s:
  • Torroja, José A.
  • Simón-Talero, José M.
  • Hernández, Alejandro
Item Type: Article
Título de Revista/Publicación: PCI Journal
Date: 2011
ISSN: 0887-9672
Volume: 56
Subjects:
Freetext Keywords: Bridges; cantilever; post-tensioning; rehabilitation; widening
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Mecánica de Medios Continuos y Teoría de Estructuras
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The San Pedro Bridge has six spans and is 750 m (2460 ft) long, 88 m (290 ft) high, 12 m (39 ft) wide, and curved with a radius of 700 m (2300 ft). It was built in 1993 using the cantilever method. Its super - structure is a prestressed concrete box girder with main spans of 150 m (490 ft). In 2008 and 2009, the width of the platform was enlarged to 23 m (75 ft) using five movable sets of scaffolding. The bridge remained open to traffic during construction. The original platform was widened 6 m (20 ft) on each side by connecting a new lightweight concrete cantilever to the original upper slab. These cantilevers were supported by steelstruts. The tie into the upper slab was made with new transverse post-tensioned tendons. The original superstructure was strengthened to resist the additional dead load of the expansion and live loads of the extra traffic. An additional new central web and a composite concrete-steel section were constructed and connected to the concrete box and central web using vertical high-strength post-tensioning bars. Also, external post-tensioning cables were implemented. It was also necessary to strengthen the connection of the original concrete box section to the piers. Detailed calculations were performed to evaluate the load distribution transmitted to the piers by the webs and by the original inclined concrete walls of the box girder. Finally, a detailed second-order-analysis of the complete structure was made to guarantee the resistance of the piers compared with actual loads

More information

Item ID: 38885
DC Identifier: http://oa.upm.es/38885/
OAI Identifier: oai:oa.upm.es:38885
Official URL: http://www.pci.org/uploadedFiles/Siteroot/Publications/PCI_Journal/2011/DOI_Articles/JL-11-SUMMER-5.PDF
Deposited by: Memoria Investigacion
Deposited on: 19 Feb 2016 17:01
Last Modified: 19 Feb 2016 17:01
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