1 Introduction</h5> Continuous assessment of structural health through vibration measurements has become one of the key issues of structural health monitoring (SHM). This online monitoring is typically conducted through an automated investigation of modal parameters estimates and of their temporal variations [1,2] , using multivariate statistical analysis tools  . Recent field applications of continuous vibration-based monitoring include long-span bridges  , footbridges  and historic structures  .</P>It is recognized that SHM of civil structures has the potential to enable timely inspection and maintenance, consequently enhancing structural safety and structural life expectancy [7,8] . However, practical SHM applications are still limited. One factor impeding the wide applicability of SHM solutions is associated with the inherent size of the structures to be monitored. Most existing sensing solutions are hardly scalable without necessitating substantial costs and complex signal processing algorithms, making SHM financially unattractive to infrastructure owners due to their apparent low return on investment.</P>The rapid growth of nanotechnologies has opened new possibilities in sensor developments [9,10] , including new multifunctional materials that enable substantial improvements in the cost-effectiveness of SHM solutions for geometrically large systems [11,12] . Building on these technological advances, the authors have recently developed a
Engineering Structures – Elsevier
Published: Feb 1, 2014
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