Read e-book online FIB 42: Constitutive modelling of high strength/high PDF

ISBN-10: 2883940827

ISBN-13: 9782883940826

Excessive Strength/High functionality Concrete (HSC/HPC) remains to be the item of specific curiosity and large examine, and its use in building is expanding continually. fib Bulletin forty two summarises the to be had details at the fabric habit of HSC/HPC, and develops a collection of code-type constitutive kinfolk as an extension of CEB-FIP version Code 1990.

Literature on experimental information and overseas directions, criteria and suggestions have been reviewed, and already-existing constitutive relatives and versions have been evaluated. as well as a few fabric legislation selected and altered for this record, a few new constitutive relatives have been built in response to the gathered info. the factors for the alternative of the present relatives in addition to the advance of the recent constitutive kinfolk concerned their simplicity and operationality (code-type mathematical formulations). in addition, that they had to be bodily sound and if attainable describe the habit of either high-performance and general energy concretes by way of a distinct relation. ultimately, compliance with the requisites given within the CEB-FIP version Code 1990 was once tested.

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4-6). The latter parts depend on the absolute size of the fracture zone. As a result size dependent stress-strain relations can be found for each member [Grimm (1996)], [Meyer (1998)]. The influence of lateral reinforcement in the fracture zone can be described as well [Meyer (1998)]. Fig. 4-6: Components of the Compression Damage Zone (CDZ) model [Markeset (1993)] 28 4 Stress and strain . If the rotation capacity of a single section is of interest, the deformation and stress distribution in the fracture zone can be calculated using the CDZ-model in a numerical analysis [Grimm (1996), Meyer (1998)].

5-6) according to [CEB (1993)]. The concrete grade has no influence in this relation. 0 MPa/s = - 3·10-5 s-1 for compression loading Dargel (1985) found out a typical development of the elastic modulus of ordinary concrete described as a function of the strain rate as represented in Fig. 5-3. 46 5 Stress and strain rate effects – impact . Fig. 5 Stress-strain relation There is a lack of information about the stress-strain relations of HPC under dynamic loads. fib Bulletin 42: Constitutive modelling of high strength/high performance concrete 47 .

4 for the 90 % quantile interval.

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FIB 42: Constitutive modelling of high strength/high performance concrete


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