Research on ultimate bearing capacity of laminated tempered glass panel under local load

An experiment was carried out to investigate mechanical behaviour of laminated tempered glass panel with two opposite edges simply supported and local uniform load applied. A total of sixty-four specimens with different thickness of single tempered glass layer (T), different bearing length (BL) and different length of loading end (LLE) were tested at a slow speed of monotonic load. The load-deflection curve and stress distribution in plate were measured under local uniform load. With the increase of the length of loading end, the failure mode of the specimens changes, and the ultimate load of the specimens varies greatly with different failure modes. The stress distribution of specimens is basically consistent with that of elastic plates. The thickness of tempered glass, length of loading end and bearing length are all positively correlated with the ultimate load of specimens. Among them, the bearing length has less influence on the ultimate load, but the thickness of glass layer has the most significant influence. For different ranges of the thickness of glass layer, its influence on the enhancing effect of the ultimate load differs to some extent, and there exists the economic thickness range of glass layer under the control index of the ultimate load. The finite element analysis model of laminated tempered glass panel under local uniform load was established, and then the calculation formula of equivalent thickness of laminated tempered glass panel based on the same maximum stress was proposed. © 2021, Editorial Office of China Civil Engineering Journal. All right reserved.