Structural Engineering and Mechanics

  • 제24권6호
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  • Pages.741-764
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  • 2006
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Time-dependent analysis of launched bridges

  • Mapelli, M. (SPEA Ingegneria Europea) ;
  • Mola, F. (Department of Structural Engineering, Politecnico di Milano) ;
  • Pisani, M.A. (Department of Structural Engineering, Politecnico di Milano)
  • 투고 : 2005.02.25
  • 심사 : 2006.07.11
  • 발행 : 2006.12.20
⟨ 이전 논문 다음 논문 ⟩

초록

The time-dependent analysis of prestressed concrete bridges built adopting the incremental launching technique is presented. After summarizing the well known results derived from the elastic analysis, the problem is approached in the visco-elastic domain taking into account the effects consequent to the complex load history affecting the structure. In particular, the effects produced by prestressing applied both in the launching phase and after it and by application of imposed displacements and of delayed restraints during the launching phases are carefully investigated through a refined analytical procedure. The reliability of the proposed algorithm is tested by means of comparisons with reference cases for which exact solutions are known. A case study of general interest is then discussed in detail. This case study demonstrates that a purely elastic approach represents a too crude approximation, which is unable to describe the specific character of the problem.

키워드

참고문헌

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피인용 문헌

  1. A parametric study of curved incrementally launched bridges vol.49, 2013, https://doi.org/10.1016/j.engstruct.2012.11.007
  2. Creep analysis of compact cross-sections casted in consecutive stages – Part 1: General method vol.43, 2012, https://doi.org/10.1016/j.engstruct.2012.04.041