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http://dx.doi.org/10.12989/cac.2015.15.3.373

Numerical modelling of nonlinear behaviour of prestressed concrete continuous beams  

Lou, Tiejiong (CEMUC, Department of Civil Engineering, University of Coimbra)
Lopes, Sergio M.R. (CEMUC, Department of Civil Engineering, University of Coimbra)
Lopes, Adelino V. (Department of Civil Engineering, University of Coimbra)
Publication Information
Computers and Concrete / v.15, no.3, 2015 , pp. 373-389 More about this Journal
Abstract
The development of a finite element model for the geometric and material nonlinear analysis of bonded prestressed concrete continuous beams is presented. The nonlinear geometric effect is introduced by the coupling of axial and flexural fields. A layered approach is applied so as to consider different material properties across the depth of a cross section. The proposed method of analysis is formulated based on the Euler-Bernoulli beam theory. According to the total Lagrangian description, the constructed stiffness matrix consists of three components, namely, the material stiffness matrix reflecting the nonlinear material effect, the geometric stiffness matrix reflecting the nonlinear geometric effect and the large displacement stiffness matrix reflecting the large displacement effect. The analysis is capable of predicting the nonlinear behaviour of bonded prestressed concrete continuous beams over the entire loading stage up to failure. Some numerical examples are presented to demonstrate the validity and applicability of the proposed model.
Keywords
prestressed concrete beams; finite element; material nonlinearity; geometric nonlinearity; behaviour;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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