Numerical Deformation Analysis of Bridge Concrete Girders

Gintaris Kaklauskas,Rokas Girdzius,Darius Bacinskas,Aleksandr Sokolov

doi:10.3846/1822-427x.2008.3.51-56

Gintaris Kaklauskas, Rokas Girdzius + Show 2 more

Open Access

https://doi.org/10.3846/1822-427x.2008.3.51-56

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Abstract

Present research was aiming at deriving tension stiffening relationship based on EC2 provisions for deformation analysis of bending RC structures. According to the algorithm proposed by the first author, a tension stiffening relationships were derived from moment-curvature diagrams of reinforced concrete beams calculated according to EC2 technique. The obtained tension stiffening relationship was applied in the parametric study, using non-linear finite element software ATENA and layered model. Theoretical results were compared with experimental data of beams reported in the literature. The defined tension stiffening relationship was also applied for calculation of moment-curvature response of reinforced concrete bridge girder. The analyses have shown that the deformations calculated using the derived tension stiffening relationship and the EC2 technique were in good agreement.

Highlights

In many countries, the design of reinforced concrete bridge structures is based on limit state method
According to the algorithm proposed by Kaklauskas and Ghaboussi (2001), a tension stiffening relationship has been derived from moment-curvature diagrams of reinforced concrete beams, calculated according to EC2 technique
Present research aimed at deriving tension stiffening relationships based on EC2 provisions for deformation analysis of bending RC structures

Summary

Introduction

The design of reinforced concrete bridge structures is based on limit state method. In various design code methods, strength analysis of reinforced concrete flexural member is based on similar approaches. Based on a variety of assumptions, many constitutive models for cracked concrete in tension have been proposed for case of short-term loading (Kaklauskas, Ghaboussi 2001; Torres et al 2004; Nayal, Rasheed 2006; Kaklauskas et al 2007). Model proposed by Kaklauskas and Ghaboussi (2001) was applied in the layered deformational approach called the flexural model (Kaklauskas 2004) This model was used by Juozapaitis et al (2006) for the analysis of behaviour of suspension pedestrian bridge structure. According to the algorithm proposed by Kaklauskas and Ghaboussi (2001), a tension stiffening relationship has been derived from moment-curvature diagrams of reinforced concrete beams, calculated according to EC2 technique. The defined tension stiffening relationship was applied for calculating the moment-curvature response of reinforced concrete bridge girder

Moment-curvature behaviour according to Eurocode 2

Method for deriving σt – εt relationships

Parametric analysis

Moment-curvature analysis of bridge concrete girder

Concluding remarks