Deformation monitoring of wood structures utilizing reflective photosensor

Yoshihiro Nitta, Toshio Onai, Akira Nishitani

    Research output: Contribution to journalArticle

    Abstract

    This paper presents a basic scheme for smart deformation monitoring methodology with sensing function and self-reinforcing function. The sensing function utilizes reflective photosensors and the self-reinforcing function employs semiactive wire brace system, which only adds the stiffness to the structure. The reflective photosensor is to quickly detect whether or not the deformation of a structure is beyond the drift limit. In this paper, the reflective photosensor is connected to the microprocessor in order to automatically assess the safety of wood structures. Based upon the assessment results, the microprocessor controls the semiactive wire brace system reinforcing the wood frame to resist severe seismic excitations. The proposed smart deformation monitoring system could automatically provide the real-time information about the structural safety under an earthquake and will provide useful information for implementing more advanced smart simple monitoring system. After the capability of the reflective photosensor is experimentally investigated, the validity of the monitoring system integrating the reflective photosensor is demonstrated by conducting small scale wood-frame model experiments. Finally, the validity of the smart deformation monitoring system with the self-reinforcing capability is demonstrated through shaking table tests.

    Original languageEnglish
    Pages (from-to)178-186
    Number of pages9
    JournalMaterials Forum
    Volume33
    Publication statusPublished - 2008

    Fingerprint

    photosensors
    Wood
    Monitoring
    microprocessors
    Microprocessor chips
    safety
    wire
    Wire
    shaking
    stiffness
    Earthquakes
    earthquakes
    Stiffness
    methodology
    conduction
    excitation
    Experiments

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials

    Cite this

    Deformation monitoring of wood structures utilizing reflective photosensor. / Nitta, Yoshihiro; Onai, Toshio; Nishitani, Akira.

    In: Materials Forum, Vol. 33, 2008, p. 178-186.

    Research output: Contribution to journalArticle

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