ピエゾ極限センサを用いた静的荷重試験による破壊前の測定比較

抄録

Applicability of new piezoelectric limit sensor to detect premonitory failure during static loading test is discussed in this paper. For that purpose, brick masonry specimens were subjected to compression test to evaluate their mechanical properties and to investigate proposed sensor response. These new sensors consist of a glass pipe containing piezoelectric film elements for measurement of signals during static loading test. The glass pipe can be directly installed in brick masonry specimens or it can be inserted into holder. In this research tube holder was made of brass material. Examination for glass pipe alone and glass pipe with brass holder are discussed in this report. And for comparison, results of measurements with piezoelectric vibration sensor are presented. Results show that sensors respond before and during broken of brick masonry specimens. Responses before broken of brick masonry specimen can be used as forecast signals to indicate dangerous condition of the structure. In case of actual buildings, these forecast signals can be employed for collapse prevention and damages mitigation. These sensors can be also used for real time structural health monitoring to detect limit state of damage or collapse.