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Concrete arch bridges built by lattice cantilevers

  • 투고 : 2012.08.29
  • 심사 : 2013.02.19
  • 발행 : 2013.03.10

초록

In this paper a study about concrete arch bridges built by lattice cantilevers is presented. Lattice cantilevers are partial structures composed of deck, arch, piers and provisional steel diagonals, organized as reticular cantilever girders, in order to build arch bridges without the use of centrings, supports or temporary towers. Characteristics of this construction methodology with its variants are explained together with their implications in the erection sequence. Partial elastic scheme method is implemented in order to find initial forces of temporary cables and a forward analysis is carried out to follow the actual sequence of construction, by extending a procedure already applied to concrete cable-stayed bridges and to arches built by the classical suspended cantilever method. A numerical application on a case-study of a concrete arch bridge is performed together with a comparison between different methodologies followed for its construction sequence. Differences between erection by lattice cantilevers and cable-stayed cantilevers, are discussed. Results can be useful for designers in conceptual design of concrete arch bridges.

키워드

참고문헌

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  3. Simplified Procedure for Evaluating the Effects of Creep and Shrinkage on Prestressed Concrete Girder Bridges and the Application of European and North American Prediction Models vol.18, pp.12, 2013, https://doi.org/10.1061/(ASCE)BE.1943-5592.0000483
  4. Arch First and Beam Later: Arch-Rib Integral Installation Construction Technology for Large-Span Tied-Arch Bridge vol.143, pp.8, 2017, https://doi.org/10.1061/(ASCE)CO.1943-7862.0001356
  5. A mixed approach for determination of initial cable forces in cable-stayed bridges and the parameters variability vol.10, pp.2, 2015, https://doi.org/10.3846/bjrbe.2015.18
  6. Partial Elastic Scheme Method in Cantilever Construction of Concrete Arch Bridges vol.18, pp.7, 2013, https://doi.org/10.1061/(ASCE)BE.1943-5592.0000396
  7. Structural analysis and improvement for a new form traveler in long-span cantilever-casting arch bridge vol.13, pp.4, 2013, https://doi.org/10.1177/16878140211009997
  8. Steel and composite tied-arch bridges: a conceptual approach to structural design vol.174, pp.4, 2013, https://doi.org/10.1680/jbren.20.00035