6533b828fe1ef96bd12884ed
RESEARCH PRODUCT
The influence of time-dependent phenomena in segmental construction of concrete cable-stayed bridges
Marcello AriciAntonino RecuperoMichele Fabio Granatasubject
EngineeringCantileverbusiness.industryStress–strain curveBuilding and ConstructionStructural engineeringBridge (nautical)creepDeckCreepCantilever methodsegmental constructionCable stayedbusinessBridgeCable-Stayed Bridge; Creep; Segmental Construction; Prestress Sequence; Cable ForcesShrinkagedescription
Construction stages of a cable-stayed bridge are characterized by a sequence in which geometric configuration, restraints and consequently stress and strain patterns vary many times till the final arrangement is achieved. When construction of concrete bridges is made by cantilever method the influence of time-dependent phenomena becomes significant. In this study an evaluation of stay stressing procedures is given by taking into account creep and shrinkage in cantilever construction of concrete cable-stayed bridges. A methodology of stay stressing is proposed with the final target of reaching the desired geometric configuration. Comparison with classical analyses performed by backward methodology is reported. A case-study is presented and discussed by performing analyses with different international creep models. Practical suggestions are given to designers, in order to minimize time-dependent effects on deck and stay internal forces and to reach an optimal final configuration.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 |