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- W2379210601 abstract "Due to the wide application of flat space trusses in practical engineering,the study on damage detection towords these structures becomes quite significant.Without the introduction of systematic error through the process of model-rebuilding,model-free damage identification theory is increasingly concerned,and has been applied in structural health monitoring for beam members.A novel kind of strain-modal-shape index is introduced in this paper,and then the method is used to identify damaged members in flat space frame structures.In the way of decreasing the cross-sectional area of some members in the model,the damage courses in these members are simulated,and five typical damage cases are analysed numerically by using FEM software.White noise is introduced into FEM analysis result data,and some members are difined as mornitoring members.Analysis result shows that the strain-modal-shape index of those damaged members are higher than those of non-damaged members in the structure.Therefore,by comparing the index of each member,the damaged members,which are located in different parts of truss,such as top chords,bottom chords and web members,can be identified.Meanwhile,the index of the members around the damaged ones are higher than those of other non-damaged member,so that there is an index-notable area around the damage member.Additionally,when all the members are mornitored,it turns out that strain-modal-shape index can also locate all the damaged ones in two or more damage cases." @default.
- W2379210601 created "2016-06-24" @default.
- W2379210601 creator A5035650323 @default.
- W2379210601 date "2012-01-01" @default.
- W2379210601 modified "2023-09-25" @default.
- W2379210601 title "Strain-Modal-Shape Index Applied in Model-Free Damage Detection for Flat Space Trusses" @default.
- W2379210601 hasPublicationYear "2012" @default.
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