Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Serviceability and Post-Failure Behaviour of Laminated Glass Structural Elements
Structural laminated glass elements are being used ever more frequently in the construction industry, following a growing architectural trend that looks for light and transparency. Nevertheless, an analysis of both regulatory and scientific state-of-the-art reveals several fields of inquiry which could benefit from deeper investigations. Namely, properties of plastics used as interlayer materials within the glass plies are scarcely investigated, professionals being far from unanimous on reliable techniques for comparing different materials on the same grounds. This manuscript presents the results of a multi-scale experimental research on the mechanical response of three interlayers: PVB, SG and DG41. The hyperelastic behaviour is studied with simple tensile tests on interlayer specimens; in the end, a novel generalized response model is proposed, which can be tuned to replicate the complex short-term and finite-strain response of any thermoplastic using few coefficients. The temperature-dependent viscoelastic problem is investigated on a larger scale, using double-lap laminated glass joints under compressive loadings. Finally, calibrated Prony series for viscoelastic models are provided together with Williams Landel Ferry coefficients for time-temperature superposition, allowing to model the viscoelastic responses of the three interlayer materials at arbitrary temperatures. Results from dynamic and static tests are compared and the tension stiffening effect of interlayers in partially damaged elements is investigated. An equivalent thermal expansion is proposed to model the mutual effects which are generated among broken and intact plies in the event of partial failure. Further tests have been carried out in fully damaged conditions, to evaluate the residual load-bearing capacity and the effects of ageing such conditions. Uniaxial tensile and compressive test on fully damaged laminated glass specimens are performed. Results are used to model the response of fully damaged beams. In the last part of the manuscript, examples of application of newly found results are used in possible laminated glass structural designs.
Serviceability and Post-Failure Behaviour of Laminated Glass Structural Elements
Structural laminated glass elements are being used ever more frequently in the construction industry, following a growing architectural trend that looks for light and transparency. Nevertheless, an analysis of both regulatory and scientific state-of-the-art reveals several fields of inquiry which could benefit from deeper investigations. Namely, properties of plastics used as interlayer materials within the glass plies are scarcely investigated, professionals being far from unanimous on reliable techniques for comparing different materials on the same grounds. This manuscript presents the results of a multi-scale experimental research on the mechanical response of three interlayers: PVB, SG and DG41. The hyperelastic behaviour is studied with simple tensile tests on interlayer specimens; in the end, a novel generalized response model is proposed, which can be tuned to replicate the complex short-term and finite-strain response of any thermoplastic using few coefficients. The temperature-dependent viscoelastic problem is investigated on a larger scale, using double-lap laminated glass joints under compressive loadings. Finally, calibrated Prony series for viscoelastic models are provided together with Williams Landel Ferry coefficients for time-temperature superposition, allowing to model the viscoelastic responses of the three interlayer materials at arbitrary temperatures. Results from dynamic and static tests are compared and the tension stiffening effect of interlayers in partially damaged elements is investigated. An equivalent thermal expansion is proposed to model the mutual effects which are generated among broken and intact plies in the event of partial failure. Further tests have been carried out in fully damaged conditions, to evaluate the residual load-bearing capacity and the effects of ageing such conditions. Uniaxial tensile and compressive test on fully damaged laminated glass specimens are performed. Results are used to model the response of fully damaged beams. In the last part of the manuscript, examples of application of newly found results are used in possible laminated glass structural designs.
Serviceability and Post-Failure Behaviour of Laminated Glass Structural Elements
Funktionstüchtigkeit und Nachbruchverhalten der Bauteile aus Verbundglas
Piscitelli, Lorenzo (Autor:in) / Universitätsbibliothek Braunschweig (Gastgebende Institution) / Kloft, Harald (Akademische:r Betreuer:in) / Orlando, Maurizio (Akademische:r Betreuer:in)
2019
Sonstige
Elektronische Ressource
Englisch
DDC:
721
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