Layered approach for long-term deflections analysis of reinforced concrete beams
Data
2001Autorius
Bačinskas, Darius
Kaklauskas, Gintaris
Vainiūnas, Povilas
Metaduomenys
Rodyti detalų aprašąSantrauka
In this paper, an attempt has been made to extend application of the integral constitutive model proposed by G. Kaklauskas to long-term deformational analysis of flexural reinforced concrete members. Constitutive relationships for compressive concrete and cracked tensile concrete used in the analysis are presented. The long-term behaviour of compressive concrete was modelled by modified Hognestad’s relationship. While for modelling of long-term behaviour of cracked tensile concrete a modified constitutive relationship proposed by G. Kaklauskas was used. A powerful approach for the time-dependent analysis of the cracked cross-section is adopted. Determination of long-time strains, stresses and deflections (curvatures) based on age-adjusted effective modulus method, a relaxation procedure and layered approach is briefly described. Statistical deflection calculation analysis has been carried out for a large number of experimental beams and it has shown a reasonable accuracy.