Long-term deflections of reinforced concrete beams

Bakoss, S L; Gilbert, Raymond Ian; Faulkes, K A; Pulmano, V A

doi:10.1680/macr.1982.34.121.203

Cited by 33 publications

(12 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The accuracy of the formula is verified by comparison with the experimental measurements of beam deflections (Bakoss et al 1982). The formula of inverse identification of creep coefficient based on the given mid-span creep deflection is deduced.…”

Section: Analytical Investigationmentioning

confidence: 83%

Long-Term Deflections of Crushed Limestone Sand Concrete Beams

Zhang

Zheng

2013

Advances in Structural Engineering

View full text Add to dashboard Cite

Creep tests of three crushed limestone sand concrete beams were conducted. The mid-span creep deflections and creep deflection coefficients of the beams in the first six months were measured. The results show that the creep deflection is significantly affected by the environmental humidity and temperature conditions. The formula of the mid-span creep deflection is derived based on the creep coefficients for simple supported beams. The mid-span creep deflections of beams are calculated using the CEB-FIP 90, ACI 209, and B3 models to predict the creep coefficient separately. Comparisons between the calculated values and experimental results indicate that the coefficients obtained using the ACI 209 model fit the results best. The formula of the creep coefficient is derived from the mid-span creep deflection. The creep coefficient of crushed limestone sand concrete is calculated from the measured mid-span creep deflection, and a best-fit formula is proposed for the creep coefficient.

show abstract

Section: Analytical Investigationmentioning

confidence: 83%

Long-Term Deflections of Crushed Limestone Sand Concrete Beams

Zhang

Zheng

2013

Advances in Structural Engineering

View full text Add to dashboard Cite

show abstract

“…focus on the creep behavior under linear stress levels, they provide a level of verification to the proposed model. Bakoss et al [1982] describe creep testing of a RC beam including experimental characterization of the creep and shrinkage material properties. The beam is simply supported with a span of 3504 mm, and is loaded in four points bending with sustained loads of 2.6 kN each applied at the third-points of the span.…”

Section: Second Examplementioning

confidence: 99%

“…Theoretical versus experimental [Bakoss et al 1982] results (the solid line is the proposed model and the squares the experimental results).…”

Section: Second Examplementioning

confidence: 99%

Nonlinear creep response of reinforced concrete beams

Hamed

2012

J. Mech. Mater. Struct.

View full text Add to dashboard Cite

The nonlinear viscoelastic behavior of reinforced concrete beams under sustained loading is investigated in this paper. A theoretical model is developed, which is based on the viscoelastic modified principle of superposition, and accounts for cracking, nonlinear behavior in compression, shrinkage, aging, and the creep rupture phenomenon of concrete. A nonlinear form of the relaxation modulus is presented, which is introduced into the constitutive relations and the corresponding nonlinear rheological Maxwell model, to account for damage. The governing equations are solved through time-stepping numerical integration, which yields an exponential algorithm following the expansion of the relaxation modulus into a Dirichlet series. The determination of the section-equivalent rigidities and creep strains along the cracked and uncracked regions is achieved through an iterative procedure at each time step. The capabilities of the model are demonstrated through numerical examples and parametric studies including comparison with test results available in the literature. The results show that creep has various and different influences on the structural response, and in some cases it may lead to a reduction of the load-carrying capacity of the member by creep rupture-type of failures.

show abstract

“…Fig. 6 shows the geometry of the concrete beam, which was tested by Bakoss et al [22]. It shows half of a two-span continuous beam and the cross-section.…”

Section: Description Of the Reinforced Concrete Beam Testmentioning

confidence: 99%