Structural analysis of hybrid steel-glass sway frames with semi-rigid joints modelled through springs

In last decades, the potential of glass in modern architecture, due to his transparency, is increased. From this, it started to be employed as load-bearing structural material for beams and columns. As a result, there is a necessity to find solutions for its brittle behaviour and improve its post-fracture performances. One of the most developed concepts are the "hybrid glass beams," where glass is combined with other materials, like stainless steel, to increase its strength and post-fracture behaviour. In particular, this master’s thesis focuses on the correct modelling of the structural system. The primary objective is to accurately replicate the connection's stiffness using a spring constant. To achieve this, the analysis will start with the experimental results of a beam-column connection developed by Mirko Pejatovic, from which the spring constant for the three considered laminations will be determined. Subsequently, two distinct numerical models will be developed to replicate the experimental outcomes. The first model will be created using ABAQUS Standard, accurately reproducing the lamination and utilizing a UMAT model which recreate the brittle behaviour of glass. The other numerical analysis will be performed with Python, employing a code based on the Direct Stiffness Method, known as the DSM tool. After isolating the connection, itself, the analysis will then shift to a frame composed of three columns and two beams subjected to both vertical and horizontal loads. Finally, a parametric study encompassing various load configurations will be executed to understand the influence of vertical and horizontal loads on the load-bearing capacity of the structure.