Analytical model of ductile reinforced concrete frames allowing for elongation of plastic hinges (2008)
Elongation in reinforced concrete members can have detrimental effect on the seismic performance of reinforced concrete structures. For reliable assessment of seismic performance, analytical models should take into account this elongation phenomenon. In this paper, an analytical model of plastic hinges has been developed and implemented into an analysis package. This model consists of a layer of horizontal concrete and steel springs to simulate the flexural behavior, as well as diagonal springs to represent the diagonal compression struts and to resist the shear force. The model is verified against experimental results of beams and frame subassembly tests found in literature. Comparisons of the analytical predictions and the experimental results show that this model can make significant advancement in predicting elongation in beam plastic hinges. It can be used to assess the effect of beam elongation on the seismic performance of reinforced concrete frame structures.
CitationPeng, B.H.H., Dhakal, R.P., Fenwick, R.C., Carr, A.J., Bull, D.K. (2008) Analytical model of ductile reinforced concrete frames allowing for elongation of plastic hinges. Taipei, Taiwan: 11th East-Asia and Pacific Conference on Structural Engineering and Construction, 19-21 Nov 2008.
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Keywordsreinforced concrete frame; beam elongation/growth; plastic hinges; seismic response
ANZSRC Fields of Research40 - Engineering::4005 - Civil engineering::400510 - Structural engineering
40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
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Peng, B.H.H.; Dhakal, Rajesh; Fenwick, R.C.; Carr, A.J.; Bull, D.K. (University of Canterbury. Civil and Natural Resources Engineering, 2007)Previous research in New Zealand has indicated that elongation of plastic hinges in reinforced concrete (RC) beams can have a significant effect on the seismic performance of RC structures. A number of empirical formulas ...
Dhakal, Rajesh; Fenwick, R.C. (American Concrete InstituteUniversity of Canterbury. Civil and Natural Resources Engineering, 2009)
In situ conditions affecting the ductility capacity of lightly reinforced concrete wall structures in the Canterbury earthquake sequence Morris, G.J.; Bull, D.K.; Bradley, Brendon (University of Canterbury. Civil and Natural Resources Engineering, 2015)Following the 2010-2011 Canterbury (New Zealand) earthquake sequence, lightly reinforced wall structures in the Christchurch central business district were observed to form undesirable crack patterns in the plastic hinge ...