banner.jpg 304 Estimation of Long Term Deflections of RC Beams Girishwetha S. R1,a, Chaithra B. E.2, K. Balaji Rao3, M. B. Anoop3 And Leelavathi K. S1,b 1Department of Civil Engineering, Reva Institute of Technology and Management, Bengaluru, 560064, India. achaithra.be10@yahoo.in bleelavathi@revainstitute.org 2Department of civil Engineering, Bangalore Institute of Technology, Bengaluru, 560004, India. chaithra.be10@yahoo.in 3Risk and Reliability of structures, CSIR-Structural Engineering Research Centre, Chennai,600113 India. email2 ABSTRACT

In this paper, the fracture mechanics based method proposed by Bazant and Oh is used for the calculation of creep deflection of thirty simply supported reinforced concrete beams (whose test results are reported by Washa and Fluck). The deflection due to shrinkage is estimated using EC2 method. The creep coefficient and the shrinkage strains are estimated using modified B3 model. Comparison of the computed long term deflection values with the corresponding experimental values suggests that the proposed method estimates satisfactorily the long term deflections. Keywords: Deflection, Creep, Bazant Fracture model, EC 2, Strain softening, Modified B3 model, RC beam.

pdflogo.jpg 304