Numerical modelling of UHPC and TRC sandwich elements for building envelopes

The aim of this study was to develop a lightweight composite facade element for new buildings and for the refurbishment of existing facades. These composite elements have been developed combining an insulation layer of autoclaved aerated concrete (AAC) with an external ultrahighperformance concrete (UHPC) supporting layer. This solution allows avoiding the use of connectors and facilitates the production procedure. The structural behavior of the facade elements is mainly influenced by the presence of the upturning edges that are able to increase the stiffness of the element and reduce the thickness of the external layer. The insulation material has no influence on the structural behavior of the UHPC boxes. Flexural tests were carried out to investigate a potential detachment of the external layer from the upturning edge. The photogrammetric analysis used during the flexural tests essentially confirmed that the bond between the two UHPC layers cast in two steps is reliable. The quality of the bond between the external layer and the upturning edge is a key parameter to define the bearing capacity of the element. K E Y W O R D S autoclaved aerated concrete, flexural testing, photogrammetric analysis, production technology, ultrahigh-performance concrete How to cite this article: Miccoli L, Fontana P, Qvaeschning D, Kreft O, Hoppe J, Meng B. UHPC-AAC facade elements: Structural design, production technology, and mechanical behavior.

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“…Table gives an overview of the geometry of the facade element. Details of the structural behavior of the facade element are reported elsewhere .…”

Section: Structural Designmentioning

confidence: 99%

UHPC–AAC facade elements: Structural design, production technology, and mechanical behavior

Miccoli¹,

Fontana

Qvaeschning

et al. 2018

ce papers

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“…The combination of a cementitious matrix with a textile reinforcement has been widely investigated for different kinds of applications: reinforcing and/or strengthening of concrete and masonry structures [2][3][4][5], construction of pedestrian bridges [6], and as skins for the fabrication of sandwich panels. In addition to an experimental characterization of the bending behaviour of TRC sandwich panels [7][8][9][10], various work has been done on the analytical [11,12] and numerical [13][14][15] modelling of this behavior. Textile reinforced cementitious composite (TRC) is characterized by a linear behavior in compression and a non-linear behavior in tension.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Behaviour of Textile Reinforced Cementitious Composites and Their Application in Sandwich Elements

et al. 2019

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Using large lightweight insulating sandwich panels with cement composite faces offers great possibilities for the renovation of existing dwellings. During their lifetime, these panels are subjected to wind loading, which is equivalent to a repeated loading. To guarantee the structural performance of these panels during their entire lifetime, it is necessary to quantify the impact of these loading conditions on the long term. The fatigue behaviour was, therefore, examined in this paper both at the material level of the faces and at the element level as well. plain textile reinforced cementitious composite (TRC) specimens were subjected to 100,000 loading cycles by means of a uniaxial tensile test, while sandwich beams were loaded 100.000 times with a four-point bending test. Results show that the residual behaviour is strongly dependent on the occurrence of cracks. The formation of cracks leads to a reduction of the initial stiffness. The ultimate strength is only affected in a minor way by the preloading history.

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Bending behaviour of sandwich panels of vegetal fabric reinforced cementitious matrix: Experimental test and numerical simulation

Mercedes

Bernat-Masó

Martínez

2022

Construction and Building Materials

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Numerical modelling of UHPC and TRC sandwich elements for building envelopes

Cited by 5 publications

References 5 publications

UHPC–AAC facade elements: Structural design, production technology, and mechanical behavior

UHPC–AAC facade elements: Structural design, production technology, and mechanical behavior

Fatigue Behaviour of Textile Reinforced Cementitious Composites and Their Application in Sandwich Elements

Bending behaviour of sandwich panels of vegetal fabric reinforced cementitious matrix: Experimental test and numerical simulation

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