Creep and shrinkage of HPC in prebended composite structures. Part I: modelling

Staquet, Stéphanie; Tailhan, J.-L.; Espion, Bernard

doi:10.1680/macr.2008.00028

Cited by 2 publications

(4 citation statements)

References 24 publications

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“…7 These fundamental parameters that are used in the proposed model to compute each part of the delayed deformations (autogenous shrinkage, thermal strain, desiccation shrinkage, basic creep, structural desiccation creep and intrinsic desiccation creep) have been evaluated with the CESAR-LCPC fem code. 8 The computation algorithm of the proposed timedependent analysis is based on a step-by-step approach where the time axis is divided into time-steps˜t p according to equation (1)…”

Section: Computation Modelsmentioning

confidence: 99%

“…with E 0p c is the delayed modulus of concrete at time t p (see Staquet et al 7 for details); (˜å bc ) p c is the increment of the basic creep strain on the time-step˜t p (see Staquet et al 7 for details).…”

Section: Computation Modelsmentioning

confidence: 99%

“…7 In models 1 and 2, the creep and the shrinkage are computed according to the CEB model in its 1999 version 4 and the value of the ambient RH was set to 70% (according to the annual average ambient RH in Belgium). In model 3, the multiple changes of the boundary conditions for heat or moisture transfers have been taken into account.…”

Section: Numerical Predictions Of the Fundamental Internal Variablesmentioning

confidence: 99%

“…In the Part 1 paper, 7 all the parameters that are typical to the HPC cast in this bridge were determined from laboratory creep and shrinkage tests. Among these parameters, the following have been selected to perform an analysis of sensitivity of the results computed on the scale of the bridge deck to the value of these parameters: the ambient RH; the threshold of the relative mass loss and the model for rewetting, either model A, rewetting strain totally reversible or model B, rewetting strain totally irreversible.…”

Section: Numerical Predictions Of the Fundamental Internal Variablesmentioning

confidence: 99%

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Creep and shrinkage of HPC in prebended composite structures. Part II: in situ case study

Staquet¹,

Tailhan²,

Espion³

2009

Magazine of Concrete Research

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A prefabricated, prebended and prestressed railway bridge deck was instrumented in June 2000 with strain gauges and vibrating wire extensometers. It is a kind of structure in which large time-dependent stress redistributions between steel and concrete are expected to occur. The purpose of this paper is to report on the comparison between strains recorded in situ on an instrumented bridge deck of this kind up to four years after its construction with values computed within the framework of four different time-dependent analyses: (a) a pseudo-elastic analysis with variable modular ratios for concrete used for the design of these bridge decks; (b) a step-by-step method applying the principle of superposition; (c) a step-by-step method incorporating a recovery function; and (d) an original modelling method. This final analysis is presented in Part 1 of this paper, which is based on the evolution of three fundamental local parameters: the temperature, the degree of advancement of reaction of hydration and the water content in concrete.

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Section: Computation Modelsmentioning

confidence: 99%

Section: Computation Modelsmentioning

confidence: 99%

Section: Numerical Predictions Of the Fundamental Internal Variablesmentioning

confidence: 99%

Section: Numerical Predictions Of the Fundamental Internal Variablesmentioning

confidence: 99%

See 2 more Smart Citations