Symmetric free vibration of cracked arches of rigid discrete blocks

摘要

The paper investigates the energy- and amplitude-dependent natural periods of symmetrically cracked semicircular arches, which are loaded by their self-weight and horizontal support displacement. The cracks appear due to previous static effects. Symmetric free vibration of the arches is under analysis. The symmetry condition results in an SDoF system, but the latter purpose of the authors is to analyse nonsymmetric modes with an MDoF model.