Exploratory experimental investigations on post-tensioned structural glass beams

Abstract

Corresponding author: Dr. ir. Christian Louter, Steel Structures Laboratory (ICOM), School of Architecture, Civil and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), GC B3 505, Station 18, Lausanne CH-1015, Switzerland. Tel.: [phone]; Fax: [phone]; E-mail: [email protected] The mechanical response of post-tensioned glass beams is explored in this paper. This is done through bending experiments on post-tensioned glass beam specimens with either mechanically anchored or adhesively bonded steel tendons by which a beneficial pre-stress is inflicted on the glass beams. In addition, reference beams with identical geometry but without tendons are tested. From the results of the bending experiments it can be seen that the post-tensioned glass beams reach higher initial fracture loads than the reference glass beams. Furthermore, the post-tensioned glass beams develop a significant post-fracture reserve. From this it is concluded that post-tensioning a glass beam is a feasible concept, which provides increased initial fracture strength and enhanced post-fracture performance.

Keywords

• Structural glass
• post-tensioning
• beam
• experiment
• fracture
• strength
• redundancy