Abstract
AbstractLaminated glass panels are increasingly installed in glazed façades to enhance the blast protection of buildings. These ductile panels offer residual bending resistance following the fracture of the glass layers, due to the composite action of the attached glass fragments in compression and the interlayer in tension. Three-point bending tests performed previously on laminated glass specimens at low temperature, which aimed to simulate the effects of high strain-rate due to the time-temperature dependency of the interlayer, demonstrated an enhancement of the ultimate load capacity by two orders of magnitude compared to that at room temperature. These tests were performed on specimens with an idealised fracture pattern, by pre-fracturing cracks at a uniform spacing of 20 mm, aligned in both glass layers. Under blast loads, however, a random pattern of irregular fragment sizes occurs, with the cracks not always aligned in the two glass layers. Additionally, the plastic hinge location within each specimen coincided with the point of application of the load, which may have influenced the results. This paper addresses these concerns by reporting on further low-temperature tests that have considered four additional pre-fractured patterns in both three- and four-point bending. The results demonstrate that the bending moment capacity of the specimens is unaffected by the number and size of the glass fragments, and by the choice of the loading rig. An enhancement of the bending capacity is consistently observed for specimens with misaligned cracks that is almost twice that of specimens with aligned cracks. This suggests that the idealised pattern with aligned cracks, considered in previous work, results in a lower-bound estimate of the bending capacity for panels with random fracture patterns formed under blast loading.
Funder
engineering and physical sciences research council
institution of civil engineers
Publisher
Springer Science and Business Media LLC
Subject
Building and Construction,Architecture,Civil and Structural Engineering
Reference40 articles.
1. Angelides, S.C., Talbot, J.P., Overend, M.: The effects of high strain-rate and in-plane restraint on quasi-statically loaded laminated glass: a theoretical study with applications to blast enhancement. Glass Struct. Eng. 4(3), 403–420 (2019). https://doi.org/10.1007/s40940-019-00107-4
2. Angelides, S.C., Talbot, J.P., Overend, M.: High strain-rate effects from blast loads on laminated glass: An experimental investigation of the post-fracture bending moment capacity based on time-temperature mapping of interlayer yield stress. Constr. Build. Mater. (2020). https://doi.org/10.1016/j.conbuildmat.2020.121658
3. Angelides, S.C., Talbot, J.P.: Blast response of laminated glass panels: a critical review of analysis and design methods. Proc. Inst. Civ. Eng. Struct. Build. (2021). https://doi.org/10.1680/jstbu.20.00248
4. Bennison, S.J., Sloan, J.G., Kristunas, D.F., Buehler, P.J., Amos, T., Smith, C.A.: Laminated glass for blast mitigation: role of interlayer properties. In: Proceedings of Glass Processing Days 2005, Tampere (2005)
5. BS En ISO 12543-2:2011: Glass in building—Laminated glass and laminated safety glass—Part 2 laminated safety glass. British Standards Institution, London (2011)
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献