A refined one-storey model has been developed to account both for the effects of plastic interaction between bi-directional horizontal forces and axial forces in resisting elements and for vertical earthquake component, which are commonly neglected by previous simplified models. Two case studies of eccentric system have been analysed in order to evidence the abilities of the model: a stiffness eccentric system and a mass eccentric one. Preliminary results show qualitatively that interaction phenomena affect stiffness eccentric and mass eccentric system in a different manner. For the analysed stiffness eccentric system, interaction phenomena and axial loads in columns induce a reduction of floor rotations. Y-dispacement are also affected, as they reduce if interaction is considered. On the contrary, for the mass eccentric system, peak floor rotations increase as interaction phenomena and asymmetric distribution of axial forces in vertical resisting elements are accounted for. In this case, vertical earthquake excitation induces a slight increase in displacements components.
Inelastic response of plan asymmetric building structures accounting for interaction phenomena in vertical resisting elements / DE STEFANO, Mario; Pintucchi, BARBARA LORENZA. - CD-ROM. - CD_ROM:(2002), pp. 0-0. (Intervento presentato al convegno Third European Workshop on the Seismic Behaviour of Irregular and Complex Structures tenutosi a Firenze nel 17-18 September 2002).
Inelastic response of plan asymmetric building structures accounting for interaction phenomena in vertical resisting elements
DE STEFANO, MARIO;PINTUCCHI, BARBARA LORENZA
2002
Abstract
A refined one-storey model has been developed to account both for the effects of plastic interaction between bi-directional horizontal forces and axial forces in resisting elements and for vertical earthquake component, which are commonly neglected by previous simplified models. Two case studies of eccentric system have been analysed in order to evidence the abilities of the model: a stiffness eccentric system and a mass eccentric one. Preliminary results show qualitatively that interaction phenomena affect stiffness eccentric and mass eccentric system in a different manner. For the analysed stiffness eccentric system, interaction phenomena and axial loads in columns induce a reduction of floor rotations. Y-dispacement are also affected, as they reduce if interaction is considered. On the contrary, for the mass eccentric system, peak floor rotations increase as interaction phenomena and asymmetric distribution of axial forces in vertical resisting elements are accounted for. In this case, vertical earthquake excitation induces a slight increase in displacements components.File | Dimensione | Formato | |
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