Abstract
This paper explores the system of laminated annealed glass beams post-tensioned through stainless steel tendons bonded to the lower glass edge. The tendons are first pre-tensioned and then adhesively bonded to the glass. The compressive pre-stress applied by the tendon increases the fracture strength of the beam; in case of glass fracture, the steel tendon provides ductility enhancing the post-fracture behaviour of the beam. In order to explore the optimal adhesive properties for such application, three types of structural adhesives were selected and applied in a post-tensioned glass beam system. The selected adhesives cover a range of stiffness from semi-rigid to rigid. Simple laminated glass beams were post-tensioned with a 15 kN force applied through the tendons and subsequently tested in four-point bending. The results show a structural response strongly dependent on the properties of the adhesive. While the application of pre-tension through stiffer adhesives significantly increased the initial fracture strength of the beams, an immediate loss of pre-stress was observed with the most flexible adhesive. Nevertheless, all the beams showed, to a varying extent, ductile postfracture behaviour and reached ultimate failure loads above the initial fracture load.
Original language | Undefined/Unknown |
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Title of host publication | GPD 2015 conference proceedings |
Editors | Jorma Vitkala |
Place of Publication | Tampere |
Publisher | Glass PerformanceDays, Glaston Finland Oy |
Pages | 383-386 |
Number of pages | 4 |
Publication status | Published - 2015 |
Externally published | Yes |
Keywords
- glass beam
- post-tensioning
- structural adhesive
- experiment
- bending strength
- redundancy