Measurement of existing operational stress using slit stress release method with optical full-field measurement.
This technology is a method for measuring the existing stress (strain) in concrete with high precision. It has received significant attention as a survey technology for the current condition investigation of PC bridges, and it was awarded the 18th National Land Technology Development Award. By using an optical full-field measurement method, it enables high-precision strain distribution measurements even in the micro-regions near the slit. 【Features】 - Measurement of the area around the slit before and after cutting using a line sensor scanner type full-field strain measurement device. - Inverse analysis using FEM analysis allows for the estimation of the existing stress in concrete members based on the measured released strain distribution. - In PC structures, it is possible to estimate the amount of prestress from the existing action stress. - It can also be utilized as data for the restoration design of PC bridges. *For more details, please download the PDF or contact us.
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【Procedure】 ■1. Identify measurement location through rebar detection ■2. Flatten the strain measurement location, clean with a cleaning solution (such as acetone), and apply patterns for image acquisition ■3. Mark the position for slit cutting ■4. Measure the concrete surface before stress release using an optical full-field measurement device (initial image) ■5. Cut a slit with a concrete cutter in a direction perpendicular to the stress application direction ■6. Again, measure the concrete surface after stress release using the optical full-field measurement device (post-deformation image) *For more details, please download the PDF or contact us.
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Our company is a unique measurement technology service provider that possesses numerous industry-leading technologies. With information-based construction as our core technology, we are a trusted consultant in the industry, holding essential technologies for the construction and maintenance of structures and infrastructure. We confidently engage in attractive work that contributes to the development of society. ■ Installation: Installation of various measuring instruments and construction of optimal systems. ■ Measurement: Real-time and full-time measurement management, remote monitoring, and alarm output. ■ Analysis: Comprehensive consulting from data analysis and predictive analysis to technical judgment. ■ Processes: Excavation work with ground support, construction involving close proximity work, cutting slope, JR track monitoring, embankment filling, shield construction, management of deformation in various structures, various load tests, etc.