Creep and shrinkage behavior of high-strength concrete and minimum reinforcement ratio for bridge columns

Mertol, Halit Cenan; Rizkalla, Sami; Zia, Paul; Mirmiran, Amir

doi:10.15554/pcij.06012010.138.154

Cited by 17 publications

(12 citation statements)

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“…Additionally, it was found that while the influence of the concrete strength on the total strain at failure depends upon the stress level, the creep strain, creep coefficient, and specific creep at failure are greater as the strength of concrete is lower. A similar observation was made in another study in which the sustained stresses were applied for 3 months, as well as in a laboratory study which lasted 2 years . It must also be noted that the longest experiment from this series lasted 60 days, which is much shorter than the information required for the application to bridges.…”

Section: Literature Reviewsupporting

confidence: 81%

Long‐term material and structural behavior of high‐strength concrete cantilever bridge: Results of 20 years monitoring

Lantsoght

Veen

Boer³

et al. 2018

Structural Concrete

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In 1997, the Second Stichtse Bridge was built in the Netherlands using the balanced cantilever method. The use of high‐strength concrete was proposed. At that time, the long‐term behaviour of this material was not known, and no code provisions were applicable. Therefore, it was proposed to monitor the material behaviour and the deflections of the bridge. To evaluate the development of the concrete compressive strength and the concrete splitting tensile strength over time, concrete cubes were cast at the same time as each of the cantilever segments, and stored inside the bridge. These samples have been tested at different points in time to study the development of the strength as a function of the elapsed time. Creep and shrinkage measurements were carried out on samples stored inside the bridge as well as in the laboratory. Temperature and moisture were monitored as well. The deflections of the bridge superstructure have been measured periodically. These measurements can be compared to predictions from finite element models. Based on the available data, it is found that the concrete compressive and splitting tensile strength remain constant. The deflections are small, and the advanced finite element models resulted in good predictions.

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Section: Literature Reviewsupporting

confidence: 81%

Long‐term material and structural behavior of high‐strength concrete cantilever bridge: Results of 20 years monitoring

Lantsoght

Veen

Boer³

et al. 2018

Structural Concrete

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“…The creep observation of HSC columns confined by fibre-reinforcements has been published (Ma & Wang, 2010). The creep behavior of HSC is similar to normal strength concrete, where the creep rate decreases as time increases (Mertol et al, 2010). This statement fits with the shrinkage formula in American Concrete Institute 209R (ACI 209R) (1992).…”

Section: Long-term Deformation Of Beams and Columns Of High Performansupporting

confidence: 55%

Long Term Deformation of Beams and Columns of High Performance Concrete

Niken

Tjahjono²,

Supartono

2017

IJTech

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The columns of a building must be stronger than the beams. The aim of this study is to obtain the cause of the long-term deformation difference by shrinkage between the beams and columns of high performance concrete with compressive strength of 60 MPa. This research was done experimentally in Indonesia during 410 days. Specimens measuring 150 mm × 150 mm × 600 mm were used, 3 pieces for the beams and 2 pieces for the columns. Deformation was obtained by using an embedded vibrating wire strain gauge for each specimen. The difference of long-term deformation in columns and beams is in their autogenous deformation behavior. This is because during the autogenous phase, swelling abnormally occurs in the column before shrinkage occurs. The abnormal swelling is caused by the press of its own weight. This phenomenon does not occur in beams. In the age range of 1 to 200 days, the behavior of the beam deformation has a similar pattern to the deformation behavior of the column with a high deformation rate. After that, at 200-410 days, column deformation changes to a very slow deformation rate. Long-term deformation in columns is lower (64%) than in the beams at 410 days age.

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“…Physico-chemical processes that occur during bonding, hardening and drying of concrete cause a number of phenomena resulting in structure changes [1][2][3]. One the results of these structural changes is called shrinkage phenomenon.…”

Section: Introductionmentioning

confidence: 99%

“…These changes, associated with the loss of water in the phase of concrete, lead to the so-called autogenous strain (also called self arisen). These systolic strain that arise soon after laying fresh concrete and within a few hours grows at a rapid pace [2,3,9].…”

Section: Introductionmentioning

confidence: 99%

“…The water vapour from the empty pores has no effect on the shrinkage. As mentioned, the greatest impact on the shrinkage has the humidity -and when it is above 90 % this phenomenon is intermitted [2,3]. Moreover, in a case of the humidity increase or concrete rewetting it is possible partially to divert the process of contraction and thus reduce the already existing deformations [9,12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative Analysis of Measured and Predicted Shrinkage Strain in Concrete

Kossakowski

Raczkiewicz

2014

Advances in Materials Science

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The article discusses the issues related to concrete shrinkage. The basic information on the phenomenon is presented as well as the factors that determine the contraction are pointed out and the stages of the process are described. The guidance for estimating the shrinkage strain is given according to Eurocode standard PN-EN 1992-1-1:2008. The results of studies of the samples shrinkage strain of concrete C25/30 are presented with a comparative analysis of the results estimated by the guidelines of the standard according to PN-EN 1992-1-1:2008

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Creep and shrinkage behavior of high-strength concrete and minimum reinforcement ratio for bridge columns

Cited by 17 publications

References 0 publications

Long‐term material and structural behavior of high‐strength concrete cantilever bridge: Results of 20 years monitoring

Long‐term material and structural behavior of high‐strength concrete cantilever bridge: Results of 20 years monitoring

Long Term Deformation of Beams and Columns of High Performance Concrete

Comparative Analysis of Measured and Predicted Shrinkage Strain in Concrete

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