Check the vibration characteristics of buildings using continuous micro-vibration! Non-destructive testing, so the building will not be damaged.
During earthquakes caused by active faults occurring directly beneath urban areas or by massive earthquakes at plate boundaries, one of the causes of significant damage to buildings is considered to be the "resonance phenomenon between buildings and the ground." By installing microtremor measurement devices on both buildings and the ground and conducting simultaneous measurements, it is possible to confirm vibration characteristics such as "natural period," "vibration mode," "twisting period," "damping constant," and "relationship with the predominant period of the ground." "Microtremor measurement" involves measuring very small vibrations in a natural state. As a non-destructive testing method, it does not damage the building, and if conducted before and after seismic retrofitting of the building, it is also possible to confirm changes in rigidity through periodic changes. 【Items that can be confirmed】 ■ Natural period of the building and ground ■ Vibration mode of the building ■ Twisting period of the building ■ Damping constant of the building *For more details, please refer to the PDF document or feel free to contact us.
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【Verification Method】 ■ Natural Period of Building and Ground - By conducting simultaneous measurements of microtremors at the rooftop of the building and the ground, and performing Fourier analysis, the natural period of the building can be determined from the spectral ratio of both. ■ Vibration Modes of the Building - By installing microtremor sensors on each floor of the building, it is possible to create a diagram of the building's vibration modes. ■ Twisting Period of the Building - By placing microtremor sensors at the ends of the same floor of the building, the twisting period can be verified using the "phase difference of the waveforms from two points." ■ Damping Coefficient of the Building - If forced vibration matching the natural period of the building is possible, the damping coefficient can be estimated by measuring and analyzing a simple damping waveform. *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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Since our establishment, our company has adhered to the corporate philosophy of "providing accurate and high-quality ground information," offering consistent technology from ground to foundation to building for our customers. In addition, with a broad perspective on the future of society, we are committed to the refinement and development of technology, the sustainable provision of high-quality information, and the training of engineers who support these efforts, contributing to the reduction of our customers' risks and the improvement of their outcomes. Please feel free to contact us if you have any requests.