NSIS/NSIRB Shock Vibration Testing Method
Impact vibration testing method for diagnosing the health of structures.
The shock vibration testing method is a way to diagnose the health of bridge piers and architectural structures. It is already registered with the Ministry of Land, Infrastructure, Transport and Tourism's NETIS, and there are evaluation criteria from organizations such as the Japan Society of Civil Engineers.
In the case of large bridge piers, a weight of about 20 kg is struck, and for frame structures, measurements are taken using a plastic hammer or similar tools. The seismic response spectrum is recorded using multiple small microphones, and mathematical processing is performed on a computer to produce results. This result is compared in a database to determine the health of the structure, making it a quantitative non-destructive testing method. It is a lightweight and easy-to-use device consisting only of a computer and microphones, capable of measuring the structural integrity with high precision and quantitatively.
Inquire About This Product
basic information
【Features】 ○ Diagnosis of the integrity of bridge piers ○ Assessment of the presence of scouring or other issues in the foundation that are not visible ○ Evaluation of the structural integrity of columns in buildings ○ Assessment of the potential for collapse of signs and similar structures This is possible. For details on the impact vibration measurement devices for NSIS (frame structures) / NSIRB (single-column bridge piers), please download the catalog or contact us.
Price information
The preparation work days for measurements will vary depending on the type of RC and steel structures in civil engineering and architecture, as well as whether it is a simple pier or a frame structure. While traffic disruption is not necessary, the price may fluctuate based on the condition of the walls in architectural structures, so please feel free to contact us. Additionally, the measurement time is 10 to 20 minutes.
Price range
P2
Delivery Time
※The delivery time may vary depending on the measurement location and quantity. Generally, the measurement time is a few minutes, but it may change depending on the location, especially in the case of architectural structures, due to the condition of the interior. Please feel free to contact us.
Applications/Examples of results
【Usage Example】 Impact is applied to road and railway bridge piers and structural buildings to observe response waveforms, and the natural frequency of the structure is measured from the vibration waveforms. In the case of road and railway bridge piers, measurements can be taken regardless of traffic conditions, and for the Shinkansen, measurements of nearly all bridge piers have been completed. For road bridges, a program has been developed to cancel out vibrations caused by traffic, and numerous measurements will be conducted from now on. It is possible to measure not only the bridge piers but also the soundness of the girders, the presence of foundation scour, and the integrity of poles, etc. For details on the NSIS/NSIRB impact vibration measurement device, please download the catalog or contact us.
catalog（1）
Download All Catalogs
Company information
Our company was established as a venture firm with the aim of proposing new methods necessary for the maintenance and management of social infrastructure facilities by utilizing excellent advanced technologies researched at Waseda University and its collaborative research institutions, both on and off campus, and returning the results to society. In particular, the NSIRB and NSIS testing methods, which involve applying impact to structures and measuring their responses to obtain the natural frequencies of the structures, are groundbreaking non-destructive testing techniques that allow for the assessment of structural integrity based on the high or low values of these frequencies. This method can be widely applied in civil engineering, architecture, utility poles, sign poles, and more.