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Abstract

This article presents a study of a wall cladding system composed of stainless steel subframe and composite, fibre-reinforced concrete cladding panels, which was been installed on a high-rise public building. The study focused on the assessment of strength, safety and durability of design through laboratory tests and numerical analyses. The laboratory tests were conducted using a threedimensional tests stand and a full-scale mock-up of the wall cladding system built at the laboratory using the actually used materials and cladding panels. The boundary conditions and the test loads corresponded to the values of actions determined during the engineering phase of the high-rise building under analysis. Noteworthy, wind actions were verified by supplementary wind tunnel testing. In addition, the stainless steel was also tested to determine the strength properties of the material actually used in construction. These test were carried out just before commencement of the curtain wall installation. The 3D model was constructed with the application of the finite element method (FEM) to obtain adequate representation of geometry, material performance and structural behaviour of the analysed wall cladding system. Particular attention was paid to determination of the parameters defining the behaviour of the cladding system sub-frame from the angle of plastic deformations of the stainless steel and the resulting failure mechanisms of the members of the structure itself. To this end, the stainless steel was subjected to appropriate performance tests to determine material properties including the values of the proportionality limit and yield strength.
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Authors and Affiliations

Maciej Cwyl
1
ORCID: ORCID
Stanisław Wierzbicki
1
ORCID: ORCID
Rafał Michalczyk
1
ORCID: ORCID

  1. Warsaw University of Technology, Faculty of Civil Engineering, Al. Armii Ludowej 16, 00-637 Warsaw, Poland
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Abstract

The developments in materials science and engineering, especially in the field of composites and polymers, have extended the scope of application of such materials in modern industrial construction. This article presents polyamide/ aluminium helping hand brackets, designed for use in rainscreens (a.k.a. ventilated façades ) and metal and glass systems. The main purpose of this study was to assess the loadbearing capacity, safety and durability of these elements through laboratory tests and numerical analyses. The laboratory tests were carried out on a three-dimensional test stand. Boundary conditions and the applied loading represented real conditions on the façade (e.g. a typical wind pressure load acting on the façade was used). Next, the experimental results were used to build a representative numerical model. Finite Element analysis was utilised to obtain a true representation of the actual behaviour of the analysed brackets subjected to various loads, taking into account the aluminium/ polyamide interaction. Constitutive behaviour of both materials, polyamide and aluminium alloy, was represented by a linear elastic model. The proposed modelling methodology was validated through full-scale load tests up to failure. The numerical model can be further used to predict the stress and strain fields in newly designed brackets subjected to any type of loading.
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Authors and Affiliations

Maciej Cwyl
1
ORCID: ORCID
Izabela Dmowska-Michalak
1
Anna Kaczmarczyk
1
Rafał Michalczyk
1
ORCID: ORCID

  1. Warsaw University of Technology, Faculty of Civil Engineering, Al. Armii Ludowej 16, 00-637 Warsaw, Poland

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