Hygrothermische Einflüsse auf die mechanischen Verbundeigenschaften leichter Ständerwände

Hygrothermal effects on the mechanical composite properties of lightweight stud walls

As main part of the investigations, the nonstructural, lightweight stud wall method using cold-formed thin-walled steel profiles and mineral-based boards was examined. The mechanical behavior of components made of composite cross-sections essentially depends on the material properties of the components used and on their interaction in the composite. When using very thin steel profiles, the activation of the cladding in the composite cross-section is of crucial significance. To meet serviceability criteria under static loads, the effective stiffness of the yielding composite is decisive. The determination of the effective stiffness requires knowledge of the modulus of displacement of the connection. The aim was to determine and evaluate the mechanical behavior under varying moisture levels. It was shown that the method of composite cross-sections with yielding mechanical bond can also be used for very thin steel profiles with gypsum board cladding and screw connections, that the use of climate-dependent displacement moduli leads to good consistency and that a realistic, mathematical determination of the load-deformation behavior of lightweight stud partitions from the initial stiffness to the quasi-elastic range is possible.