A technique for controlling the stress and strain state of beams consists in introducing stretched slipping cables at their interior. This provides a coupling between the local cable strain and the global rod deformation which makes conventional rod models based on local balance conditions inapplicable. The paper presents a model for this kind of structural system in order to formulate the elastic problem and to analyse the stability of known balanced configurations. A generic cable path crossing the interior of the rod is considered. Both variational formulation and local formulation are reported; in particular the latter leads to integro-differential equations. Some qualitative aspects related to the particular coupling between the system components and the effect on the cable path geometry on the stability are discussed.

Thin walled beams with internal unbonded cables: balance conditions and stability

DALL'ASTA, Andrea;LEONI, Graziano
1997-01-01

Abstract

A technique for controlling the stress and strain state of beams consists in introducing stretched slipping cables at their interior. This provides a coupling between the local cable strain and the global rod deformation which makes conventional rod models based on local balance conditions inapplicable. The paper presents a model for this kind of structural system in order to formulate the elastic problem and to analyse the stability of known balanced configurations. A generic cable path crossing the interior of the rod is considered. Both variational formulation and local formulation are reported; in particular the latter leads to integro-differential equations. Some qualitative aspects related to the particular coupling between the system components and the effect on the cable path geometry on the stability are discussed.
1997
262
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/112804
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