State of Research

In recent years more and more investigations on the carrying capacity and on the stability of glass pro­files with rectangular cross-section have been carried out since these were mostly used so far. These investigations concentrated on the problems of local stresses as well as on global influences (Hess, 2002). All of this leads to a significantly increasing deployment of glass constructions – this applies for carrying elements, too. This development is not giving impetus, though, with regard to qualita­tively new forms of construction or structure.

The recent research on the field of constructive glass building can be divided into three main areas:

• Carrying behaviour of construction elements (Hess, 2000; Hess, 2002),

• Problems of the local carrying behaviour especially with regard to bearing and connection (Schuler et al, 2004; Bernard et al, 2004),

• Adhesive techniques (Wiesner, 2004; Muller, 2004).

Recent investigations try to further develop the given technical possibilities of glass as well as those of connection elements. This applies basically for (Weller et al, 2004):

• Laminated glass (Schober and Schneider, 2004),

• a variety of local mechanic holders (Veer et al, 2001),

• the attempt to replace silicate adhesives by new acrylic adhesives or similar things (Dilger et al,

2003) .

These developments have their significance as to an increased safety, easier execution and an en­largement of the glass sheets in relation to the necessary supportive constructions. All of these investi­gations have in common that they basically try to improve efficiency and reliability using known paths (Bornemann et al., 2003; Welters and Dilger, 2003).