A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
External CFRP tendon members: Secondary reactions and moment redistribution
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.
External CFRP tendon members: Secondary reactions and moment redistribution
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.
External CFRP tendon members: Secondary reactions and moment redistribution
Lou, Tiejiong (author) / Lopes, Sergio M.R. (author) / Lopes, Adelino V. (author)
Composites, Part B: Engineering ; 57 ; 250-261
2014
12 Seiten, 20 Quellen
Article (Journal)
English
External CFRP tendon members: Secondary reactions and moment redistribution
| British Library Online Contents | 2014
Moment redistribution in continuous CFRP-strengthened concrete members: experimental results
| British Library Conference Proceedings | 2003
| British Library Online Contents | 2014