We introduce an alternative way of constructing continuous flexible tubes and tubular structures based on a discrete, semi-discrete smooth construction surfaces known as T-hedra in the discrete case profile-affine setting, respectively. The geometric understanding this method enables us to generalize with rigid-foldability extend isometric deformation. This achievement implies unified treatment...

There are several idealizations in numerical analysis of structures. In the joints and supports, which is usually assumed to be pinned or rigid, semi-rigid connection should be considered to obtain more realistic, reliable and also economical results. In this study, rotational spring stiffness-connection ratio relation is clearly explained and revealed. A finite element program SEMIFEM is devel...

the present study sets out to integrate the performance-based seismic design approach with the connection topology optimization method. performance-based connection topology optimization concept aims to simultaneously optimize the size of members and the type of connections with respect to the framework of performance-based seismic design. this new optimization concept is carried out for unbrac...