Behavior of fully stressed design of structures and its relationshipto minimum-weight design

Razani, Reza

doi:10.2514/6.1965-76

Cited by 5 publications

(4 citation statements)

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“…Using full stress method [26], the finite element models were optimized by adjusting stress ratio of members to make sure that steel consumption in the five investigated structural forms is the same. The impact of steel consumption on structural stability is eliminated and the initial stability of the structural forms can be ensured.. For instance, the overall stability of the structure can be mildly improved when stress ratio of top members is lower than that of other members.…”

Section: Finite Element Modelmentioning

confidence: 99%

Nonlinear stability analysis of steel cooling towers considering imperfection sensitivity

Zhu

Dong

et al. 2020

Thin-Walled Structures

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Section: Finite Element Modelmentioning

confidence: 99%

Nonlinear stability analysis of steel cooling towers considering imperfection sensitivity

Zhu

Dong

et al. 2020

Thin-Walled Structures

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“…Stiffness Distribution for Fully-stressed Designs. Motivated by the idea of optimal material distribution for full utilization (i.e., members stress demand to capacity ratio of 1.0) under design loads [43,39], we define a fully-stressed design in the context of failure in shear frames as a stable arrangement of structural members such that the resulting frame fails simultaneously at all stories under the application of design loads. For a shear frame loaded laterally as in Fig.…”

Section: 2mentioning

confidence: 99%

Post-Event Plastic Failure Analysis of Shear Frames From Their Pre-Event Elastic Response

Alimoradi¹

2019

Preprint

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We demonstrate that plastic failure loads of shear frames can be inferred from their elastic ambient response. The interstory plastic mechanism force is derived for moment-resisting (rigid) frames as a function of two measured elastic (low-amplitude) frequencies. Structural health monitoring techniques are traditionally devised for “post-event” assessment of structures after exposure of a facility to a potentially damaging loading event such as strong earthquakes or blasts. The knowledge of induced damage, its location, and severity in an otherwise functioningstructure, as important as it is, may be too late for precautionary preparations. Naturally, one is interested in identiﬁcation of potential failure mechanisms and indicators prior to damaging events when a structure is responding to environmental loads elastically. Are post-event plastic failure loads identiﬁable from the pre-event ambient response? We answer this question by ﬁrst deriving interstory shear stiﬀness values from a set of measured ambient frequencies that are then incorporated into post-elastic equilibrium equations for a closed-form expression of failure loads as a function of measured frequencies. We test our procedure using a typical shear frame example as proof of concept. To extend the relevance and applicability of the proposed procedure we consider uncertainties associated with the measured and estimated quantities and assess their eﬀects in our model output. The closed-form solutions presented allow study of fully-stressed designs and we present the optimal stiﬀness distribution for such designs as another example. It is anticipated that temporal relevance of structural health monitoring techniques to “pre-event” assessment will be extended in the near future to such promising technologies as earthquake early warning systems.

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“…Optimization is adopted as a selection of testing parameters in monitoring of bridges (see references [7][8][9][10][11]). The selection of testing parameters is subjected to following constraints:  Geometric constraints-minimum and maximum areas, dimensions and rigidities of thin-walled members adopted,  Stress constraints-maximum allowable stress,  Displacement constraints-minimum and maximum deformations, rotations and displacements,  Resonance, stability and fatigue ultimate limits.…”

Section: Structural Optimizationmentioning

confidence: 99%

Positioning in Dynamic Testing of Slender Bridges

Tesar¹,

Bencat²

2011

POS

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The positioning combined with multi-functioning and interactive mechanics in dynamic testing of slender bridges are treated in present paper. The approach takes into account multiple functions in dynamic testing of slender bridges constructed of thin-walled structural members with their hierarchical configuration. Theoretical, numerical and experimental in situ assessments of the problem are presented. Some results of the application in situ are submitted

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Behavior of fully stressed design of structures and its relationshipto minimum-weight design

Cited by 5 publications

References 0 publications

Nonlinear stability analysis of steel cooling towers considering imperfection sensitivity

Nonlinear stability analysis of steel cooling towers considering imperfection sensitivity

Post-Event Plastic Failure Analysis of Shear Frames From Their Pre-Event Elastic Response

Positioning in Dynamic Testing of Slender Bridges

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