OS11F019 High Speed Full-field Strain Measurement of RC Member Subjected to Dynamic Load

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  • Kawabata Yuichiro
    Structural Mechanics Group, Port and Airport Research Institute
  • Iwanami Mitsuyasu
    Structural Mechanics Group, Port and Airport Research Institute
  • Kato Ema
    Structural Mechanics Group, Port and Airport Research Institute
  • Goda Hiroki
    Graduate School of Engineering, Kyushu Institute of Technology

抄録

Reinforced concrete (RC) structures would be subjected to accidental huge loads infrequently. In port facilities, accidental loads such as earthquake, collision of ships, tsunami attack incidentally to RC structures, causing collapse of structural members. It is required to develop the design method of RC structure against such accidental impact loads. The process of shear failure which is one of the failure patterns of RC structures has not been fully understood because of lack of data by experiments or numerical analysis. As the shear failure of RC member shows localized damage, it is required to make clear the strain distribution and its time-dependency under dynamic loads. Conventional technology such as strain gauge, however, is difficult to measure strain distribution at high resolution. This study reports the strain distribution and its time-dependency of RC member under dynamic loads. The dynamic loading test on RC beams was conducted and monitored with high-speed camera. The Digital Image Correlation (DIC) was applied to the obtained image, and the strain distribution was calculated by rosette analysis. As a result, strain distribution and its time-dependency of RC member under dynamic loads could be obtained by DIC analysis. It could be concluded that DIC analysis with high-speed camera would be a promising tool to track dynamic change in strain distribution of RC member.

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