A STUDY ON THE DESIGN METHOD FOR AXIAL COMPRESSIVE RESISTANCE OF GLASS COLUMNS LATERALLY AND TORSIONALLY CONSTRAINED BY STRUCTURAL ADHESIVE

One form of glass columns in engineering application is that the columns are connected with glass panels through structural adhesive, where the stability of the columns can be improved by the constraint effects from the structural adhesive. Considering the lateral and torsional spring constraints of structural adhesive on the glass column, the critical load formula of the glass column under axial compression is derived based on equilibrium equations. The influences of the elastic modulus of structural adhesive, the height, section depth and section thickness of the glass column on the critical load are discussed. It is found that the elastic modulus of structural adhesive and the section thickness of the glass column influence the critical load most significantly. The critical load formula is then extended to laminated glass columns based on the equivalent stiffness method. For the structural silicone adhesive commonly used in engineering practice, the design criteria for the load resistance of the glass columns are derived with the consideration of glass cracking and adhesive failure. The rationality of the theoretical research is verified by FEM analysis.