  Although isogeometric analysis exploits smooth B-spline and NURBS basis
functions for the definition of discrete function spaces as well as for the
geometry representation, the global smoothness in so-called multipatch
parametrizations is an issue. Especially, if strong C1 regularity is required,
the introduction of function spaces with good convergence properties is not
straightforward. However, in 2D there is the special class of analysis-suitable
G1 (AS-G1) parametrizations that are suitable for patch coupling. In this
contribution we show that the concept of scaled boundary isogeometric analysis
fits to the AS-G1 idea and the former is appropriate to define C1-smooth basis
functions. The proposed method is applied to Kirchhoff plates and its
capability is demonstrated utilizing several numerical examples. Its
applicability to non-trivial and trimmed shapes is demonstrated.
