### Abstract

Despite the recent increase in the scientific literature on new vibration-based damage location techniques, it is commonly recognized that only methods that use mode-shape information are proven to be effective in Structural Health Monitoring of civil structures. Mere comparison of the modal shapes of a structure in the pre- and postdamage situations does not usually yield results useful for locating the damage, so the mode-shape information needs to be rearranged in a more appropriate form. The most common approaches proposed in the literature are based on concepts such as strain mode shape, flexibility matrix, Damage Locating Vectors (DLV), strain energy. In this contribution the authors show how the theoretical basis of most of the techniques proposed in the literature can be easily compared when the mechanical problem is recast in a generalized-strain coordinate system. The possibilities and limits of these approaches are first highlighted with simple numerical examples. The methods are then applied to the damage location in an experimental prototype of instrumented beam.

Original language | English |
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Title of host publication | Conference Proceedings of the Society for Experimental Mechanics Series |

Number of pages | 15 |

Publication status | Published - 2 Feb 2006 |

Event | 24th Conference and Exposition on Structural Dynamics 2006, IMAC-XXIV - St Louis, MI, United States Duration: 30 Jan 2006 → 2 Feb 2006 |

### Conference

Conference | 24th Conference and Exposition on Structural Dynamics 2006, IMAC-XXIV |
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Country | United States |

City | St Louis, MI |

Period | 30/01/06 → 2/02/06 |

### Fingerprint

### Keywords

- damage detection
- structural dynamics
- damage localization
- flexibility matrices

### Cite this

*Conference Proceedings of the Society for Experimental Mechanics Series*

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*Conference Proceedings of the Society for Experimental Mechanics Series.*24th Conference and Exposition on Structural Dynamics 2006, IMAC-XXIV, St Louis, MI, United States, 30/01/06.

**Strain-based approaches to damage localization in civil structures.** / Zonta, Daniele; Bernal, Dionisio.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

TY - GEN

T1 - Strain-based approaches to damage localization in civil structures

AU - Zonta, Daniele

AU - Bernal, Dionisio

PY - 2006/2/2

Y1 - 2006/2/2

N2 - Despite the recent increase in the scientific literature on new vibration-based damage location techniques, it is commonly recognized that only methods that use mode-shape information are proven to be effective in Structural Health Monitoring of civil structures. Mere comparison of the modal shapes of a structure in the pre- and postdamage situations does not usually yield results useful for locating the damage, so the mode-shape information needs to be rearranged in a more appropriate form. The most common approaches proposed in the literature are based on concepts such as strain mode shape, flexibility matrix, Damage Locating Vectors (DLV), strain energy. In this contribution the authors show how the theoretical basis of most of the techniques proposed in the literature can be easily compared when the mechanical problem is recast in a generalized-strain coordinate system. The possibilities and limits of these approaches are first highlighted with simple numerical examples. The methods are then applied to the damage location in an experimental prototype of instrumented beam.

AB - Despite the recent increase in the scientific literature on new vibration-based damage location techniques, it is commonly recognized that only methods that use mode-shape information are proven to be effective in Structural Health Monitoring of civil structures. Mere comparison of the modal shapes of a structure in the pre- and postdamage situations does not usually yield results useful for locating the damage, so the mode-shape information needs to be rearranged in a more appropriate form. The most common approaches proposed in the literature are based on concepts such as strain mode shape, flexibility matrix, Damage Locating Vectors (DLV), strain energy. In this contribution the authors show how the theoretical basis of most of the techniques proposed in the literature can be easily compared when the mechanical problem is recast in a generalized-strain coordinate system. The possibilities and limits of these approaches are first highlighted with simple numerical examples. The methods are then applied to the damage location in an experimental prototype of instrumented beam.

KW - damage detection

KW - structural dynamics

KW - damage localization

KW - flexibility matrices

UR - http://www.scopus.com/inward/record.url?scp=84861559442&partnerID=8YFLogxK

M3 - Conference contribution book

SN - 0912053941

SN - 9780912053943

BT - Conference Proceedings of the Society for Experimental Mechanics Series

ER -