This paper provides an overview of methods to detect, locate, and characterize damage in structural and mechanical systems by examining changes in measured vibration response. Research in vibration-based damage identification has been rapidly expanding over the last few years. The basic idea behind this technology is that modal parameters (notably frequencies, mode shapes, and modal damping) are functions of the physical properties of the structure (mass, damping, and stiffness). Therefore, changes in the physical properties will cause detectable changes in the modal properties. The motivation for the development of this technology is presented. The methods are categorized according to various criteria such as the level of damage detection provided, model-based versus non-model-based methods, and linear versus nonlinear methods. The methods are also described in general terms including difficulties associated with their implementation and their fidelity. Past, current, and future-planned applications of this technology to actual engineering systems are summarized. The paper concludes with a discussion of critical issues for future research in the area of vibration-based damage identification.

A summary review of vibration-based damage identification methods

Damage assessment by FE model updating using damage functions

This paper provides an overview of methods that examine changes in measured vibration response to detect, locate, and characterize damage in structural and mechanical systems. The basic idea behind this technology is that modal parameters (notably frequencies, mode shapes, and modal damping) are functions of the physical properties of the structure (mass, damping, and stiffness). Therefore, changes in the physical properties will cause detectable changes in the modal properties. The motivation for the development of this technology is first provided. The methods are then categorized according to various criteria such as the level of damage detection provided, model-based vs. non-model-based methods and linear vs. nonlinear methods. This overview is limited to methods that can be adapted to a wide range of structures (i.e., are not dependent on a particular assumed model form for the system such as beam-bending behavior and methods and that are not based on updating finite element models). Next, the methods are described in general terms including difficulties associated with their implementation and their fidelity. Past, current and future-planned applications of this technology to actual engineering systems are summarized. The paper concludes with a discussion of critical issues for future research in the area of modal-based damage identification.

/pdf/an-overview-of-modal-based-damage-identification-methods-4de78bx14w.pdf

An overview of modal-based damage identification methods

This paper addresses the problem of structural health monitoring (SHM) and damage detection based on a statistical model updating methodology which utilizes the measured vibration responses of the ...

Application of a Statistical Model Updating Approach on Phase I of the IASC-ASCE Structural Health Monitoring Benchmark Study

Urban and infrastructure sustainability has become a very prominent element in the day-to-day debate on urban policy. In an atmosphere where civilization is progressing and becoming more aware of the consequences of careless development decisions, rethinking sustainable development, particularly sustainable urban and infrastructure development, has become a necessity. In recent years, the importance of this has been highlighted by the adverse impacts of human activities such as a rapidly changing climate and the severe effects of greenhouse gas emissions. This book considers the role of urban, regional and infrastructure planning in achieving sustainable urban and infrastructure development by providing insights into overcoming the consequences of unsustainable development.

/pdf/rethinking-sustainable-development-urban-management-2f405m0vp2.pdf

Rethinking sustainable development : urban management, engineering, and design

This papa reports the application of a proposed method combiig Sensitivity .%I@ and MAUCOhfAC Analysis in damage detection for a steel portal frame. Experimental work has been carried out for the veritication of this method. Before and after the structure was damaged, altogether 6 sets of vibrational data were measured under 2 different joint conditions (Rigid and Pinned) and 2 different damage locations (Beam-Column and Column-Base connections). The results show that if the most sensitive correlated mode pairs selected from the sensitivity study are used in the MACICOMAC analysis, the COMAC values Vs. Node Number graph can give a more reliable indication of the location of damage. NOMENCLATURE

H. F. Lam

Papers

Damage Detection in Steel Framed Structures by Vibration Measurement Approach