Minimum volume design of structures with constraints on ductility and stability

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20 Citazioni (Scopus)

Abstract

A minimum volume design problem of elastic perfectly plastic frame structures subjected to different combinations of fixed and seismic loads is presented, in which the design variables are considered as appertaining alternatively to a continuous assigned range as well as to appropriate discrete sets. The structure is designed so as to behave elastically for the applied fixed loads, to shakedown in presence of serviceability seismic conditions and to prevent the instantaneous collapse for suitably chosen combinations of fixed and high seismic loadings. In order to avoid further undesired collapse modes, the P-Delta effects are considered and the structure is also constrained to prevent element buckling. Furthermore, some suitable constraint on the structure ductility is imposed referring to the plastic strains generated during the transient phase structural response. The dynamic structural response is obtained by utilizing an appropriate modal technique referring to the response spectrum defined by the Italian code. The proposed minimum volume design problem is formulated, according to the required structural behaviour, on the ground of a statical approach. Different numerical applications related to steel frames conclude the paper.
Lingua originaleEnglish
pagine (da-a)47-56
Numero di pagine10
RivistaEngineering Structures
Volume68
Stato di pubblicazionePublished - 2014

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Structural dynamics
Buckling
Ductility
Plastic deformation
Plastics
Steel

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cita questo

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title = "Minimum volume design of structures with constraints on ductility and stability",
abstract = "A minimum volume design problem of elastic perfectly plastic frame structures subjected to different combinations of fixed and seismic loads is presented, in which the design variables are considered as appertaining alternatively to a continuous assigned range as well as to appropriate discrete sets. The structure is designed so as to behave elastically for the applied fixed loads, to shakedown in presence of serviceability seismic conditions and to prevent the instantaneous collapse for suitably chosen combinations of fixed and high seismic loadings. In order to avoid further undesired collapse modes, the P-Delta effects are considered and the structure is also constrained to prevent element buckling. Furthermore, some suitable constraint on the structure ductility is imposed referring to the plastic strains generated during the transient phase structural response. The dynamic structural response is obtained by utilizing an appropriate modal technique referring to the response spectrum defined by the Italian code. The proposed minimum volume design problem is formulated, according to the required structural behaviour, on the ground of a statical approach. Different numerical applications related to steel frames conclude the paper.",
author = "Luigi Palizzolo and Alessandra Caffarelli and Pietro Tabbuso",
year = "2014",
language = "English",
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journal = "Engineering Structures",
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TY - JOUR

T1 - Minimum volume design of structures with constraints on ductility and stability

AU - Palizzolo, Luigi

AU - Caffarelli, Alessandra

AU - Tabbuso, Pietro

PY - 2014

Y1 - 2014

N2 - A minimum volume design problem of elastic perfectly plastic frame structures subjected to different combinations of fixed and seismic loads is presented, in which the design variables are considered as appertaining alternatively to a continuous assigned range as well as to appropriate discrete sets. The structure is designed so as to behave elastically for the applied fixed loads, to shakedown in presence of serviceability seismic conditions and to prevent the instantaneous collapse for suitably chosen combinations of fixed and high seismic loadings. In order to avoid further undesired collapse modes, the P-Delta effects are considered and the structure is also constrained to prevent element buckling. Furthermore, some suitable constraint on the structure ductility is imposed referring to the plastic strains generated during the transient phase structural response. The dynamic structural response is obtained by utilizing an appropriate modal technique referring to the response spectrum defined by the Italian code. The proposed minimum volume design problem is formulated, according to the required structural behaviour, on the ground of a statical approach. Different numerical applications related to steel frames conclude the paper.

AB - A minimum volume design problem of elastic perfectly plastic frame structures subjected to different combinations of fixed and seismic loads is presented, in which the design variables are considered as appertaining alternatively to a continuous assigned range as well as to appropriate discrete sets. The structure is designed so as to behave elastically for the applied fixed loads, to shakedown in presence of serviceability seismic conditions and to prevent the instantaneous collapse for suitably chosen combinations of fixed and high seismic loadings. In order to avoid further undesired collapse modes, the P-Delta effects are considered and the structure is also constrained to prevent element buckling. Furthermore, some suitable constraint on the structure ductility is imposed referring to the plastic strains generated during the transient phase structural response. The dynamic structural response is obtained by utilizing an appropriate modal technique referring to the response spectrum defined by the Italian code. The proposed minimum volume design problem is formulated, according to the required structural behaviour, on the ground of a statical approach. Different numerical applications related to steel frames conclude the paper.

UR - http://hdl.handle.net/10447/101198

M3 - Article

VL - 68

SP - 47

EP - 56

JO - Engineering Structures

JF - Engineering Structures

SN - 0141-0296

ER -