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|Title:||External CFRP tendon members: Secondary reactions and moment redistribution||Authors:||Lou, Tiejiong
Lopes, Sergio M. R.
Lopes, Adelino V.
|Keywords:||Fibres; Mechanical properties; Finite element analysis; Computational modeling||Issue Date:||Feb-2014||Publisher:||Elsevier||Citation:||LOU, Tiejiong; LOPES, Sérgio M.R., LOPES, Adelino V. - External CFRP tendon members: Secondary reactions and moment redistribution. "Composites Part B: Engineering". ISSN 1359-8368. Vol. 57 (2014) p. 250-261||Serial title, monograph or event:||Composites Part B: Engineering||Volume:||57||Abstract:||The response of prestress secondary reactions in the post-elastic range has been a topic of much controversy. Due to the brittleness of FRP (fiber reinforced polymer) composites, external FRP tendon members may have different moment redistribution characteristics compared to conventional concrete members. This paper presents a numerical investigation into the secondary reactions and moment redistribution in prestressed concrete continuous members with external CFRP tendons. The investigation parameters include the initial prestress level and the pattern of loading. The secondary reactions are computed using a newly developed method based on the linear transformation concept combined with a nonlinear finite element analysis. The results indicate that the secondary reactions increase quicker after concrete cracking and nonprestressed steel yielding. As a consequence, the secondary moment should be included in the design moment. The moment redistribution behavior for symmetrical loading is shown to be quite different from that for unsymmetrical loading. The study also shows that the effect of initial prestress on the moment redistribution is rather important.||URI:||10.1016/j.compositesb.2013.10.010
|Appears in Collections:||I&D CEMUC - Artigos em Revistas Internacionais|
FCTUC Eng.Mecânica - Artigos em Revistas Internacionais
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