Thin‐walled shell structures made of textile‐reinforced concrete

Scholzen, Alexander; Chudoba, Rostislav; Hegger, Josef

doi:10.1002/suco.201300071

Cited by 112 publications

(63 citation statements)

References 14 publications

(11 reference statements)

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“…Finally, using (Eq. (12), it must be verified that the total utilization ratio η nmd (α) lies within the admissible range for all elements and all loading case combinations considered.…”

Section: Automated Assessment Proceduresmentioning

confidence: 99%

“…Furthermore, as the direction of the principal stresses calculated from the stress resultants might also vary for the top and bottom surfaces of a TRC shell, the assessment procedure described is performed for both sides. In order to demonstrate the design procedure described, the following section shows the ultimate limit state assessment of the TCR shell structure actually built (described in [12]). …”

Section: Automated Assessment Proceduresmentioning

confidence: 99%

“…2b and 2c show the responses of two test series with different reinforcement ratios. In both series, 12 layers of carbon fabric were used [12]. The total cross-sectional area of the 800 tex carbon rovings, each with a cross-sectional area of 0.447 mm 2 , was A tex = 85.8 mm 2 .…”

Section: Quality Of the Measured Tensile Test Datamentioning

confidence: 99%

“…The strength characteristics of a TRC cross-section needed for the ultimate limit state assessment of the roof shell structure described in [12] have been determined using the tensile and bending tests depicted in Figs. 1 and 2 respectively.…”

Section: Experimental Characterization Of Trc 21 Test Setups For Tenmentioning

confidence: 99%

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Thin‐walled shell structures made of textile‐reinforced concrete

Scholzen

Chudoba

Hegger

2015

Structural Concrete

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The present paper describes a design approach for textile-reinforced concrete (TRC) Whereas steel-reinforced concrete cross-sections can be designed and dimensioned solely based on the material laws for steel and concrete, the direct design of TRC crosssections using the component characteristics is not yet possible. The reason or this is the existence of a wide variety of textile fabrics [6] differing in material, type of weave and coating, which affect the stress-strain response of the composite quite significantly. Therefore, the cross-sectional strength characteristics of TRC have to be determined experimentally for each material combination considered. For this purpose, several types of test setup have been developed recently [3, 7, 8, 9].The existing engineering models for TRC [1, 2, 3] have been derived mostly for relevant uniaxial stress states, e.g. for TRC beam or truss elements. However, as documented in [10], by using simple linear finite element analyses, it is possible to exploit the high potential of this composite material, especially in thin shell structures. However, engineering models and design tools for TRC shell structures are still lacking. In this paper, we propose a systematic approach to the ultimate limit state assessment of spatial TRC structures with complex loading scenarios. Compared with the engineering models mentioned, two additional important effects are included in the design approach: i) simultaneous action of normal forces and bending moments on a TRC shell cross-section and ii) a strength reduction due to the direction of loading not being aligned with the orientation of the textile fabrics.The paper starts with a review of the test setups used for deriving the strength characteristics of the TRC crosssection (section 2.1). This is followed by a brief discussion of the test data interpretation (section 2.2). A simplified n-m interaction diagram for combined loading is introduced in section 3.1 and extended with the effect of oblique loading and butt joints between the fabrics in sections 3.2 and 3.3 respectively. The general assessment criterion is then given in section 3.4. The proposed automated assessment procedure accounting for the anisotropy of the TRC shell exposed to general loading conditions is described in section 3.5. An example of the application of the assessment procedure is given in section 4 for a roof structure in double curvature, including the evaluation of the cross-sectional strength characteristics in section 4.1 and the evaluation of the utilization ratio in section 4.2. The non-linear loadbearing behaviour of TRC and the structural reserves available due to stress redistributions within the shell are studied numerically in section 4.3. The present paper extends and generalizes the concepts originally published in the German language [11].

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“…Finally, using (Eq. (12), it must be verified that the total utilization ratio η nmd (α) lies within the admissible range for all elements and all loading case combinations considered.…”

Section: Automated Assessment Proceduresmentioning

confidence: 99%

Section: Automated Assessment Proceduresmentioning

confidence: 99%

Section: Quality Of the Measured Tensile Test Datamentioning

confidence: 99%

Section: Experimental Characterization Of Trc 21 Test Setups For Tenmentioning

confidence: 99%

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Thin‐walled shell structures made of textile‐reinforced concrete

Scholzen

Chudoba

Hegger

2015

Structural Concrete

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“…Application of this type of reinforcement increases the durability of the composite material compared to steel reinforced concrete and extends the range of its applicability in construction. Recently, TRC has been used for construction of large scale, thin-walled shells [1,2], sandwich wall or slab panels [3], facade elements [4] and pedestrian bridges [5]. Focus of this paper is restricted to thin-walled TRC shell structures uniformly reinforced with textile fabrics.…”

Section: Introductionmentioning

confidence: 99%

Cross-Sectional Failure Criterion Combined With Strain-Hardening Damage Model for Simulation of Thin-Walled Textile-Reinforced Concrete Shells

Sharei¹,

Scholzen²,

Chudoba³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. Application of textile reinforced concrete (TRC) can significantly facilitate the manufacturing of thin-walled shell structures. Thanks to the high tensile strength and longtime durability of textile reinforcement, construction of much thinner cross sections compared to ordinary reinforced concrete has become possible. Furthermore the form-flexibility of textile reinforcement allows for much more freedom in design of shells with more complex geometries. However, these advantages make the prediction of the structural behavior under imposed loads much more difficult. Due to the complex stress redistribution in the plane of shell and also the anisotropic behavior of the composite material, different modes of failure can be observed in TRC shell structures. In this paper we focus on the failure criterion of thin-walled TRC shell elements. In particular, we propose a criterion reflecting the interaction of normal force and bending moment in a shell cross section. The failure criterion has been implemented in combination with an anisotropic damaged-based material model in order to provide realistic prediction of the structural load-carrying behavior. The accuracy of the model in prediction of different failure modes has been validated using three different types of tests setups. 6823

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