ABSTRACT
The shear modulus is a crucial mechanical property for modelling structural behaviors. This study proposes a correct method for determining the shear modulus of laminated glass beams with SentryGlas Plus interlayer by conducting a comparative torsion test between calculating the shear modulus from torsion machine readings and obtaining it from the specimen’s central section using photogrammetric technique. Additionally, inclinometer sensors and monolithic glass beam were employed to validate the measuring accuracy of the calibrated system and the feasibility of the torsion testing method for the laminated glass beam. Comparative results suggest a large discrepancy in the shear modulus using two test methods. A straightforward apparatus further validated the inaccuracy of calculating the shear modulus from torsion machine readings due to machine end rotation errors. This raises awareness of academics and engineers to adopt a proper test method for evaluating torsional properties of structures and effectively address structural safety issues.
