The EverScan product suite includes innovative inspection tools to assess structural pathologies and help predict the residual life of cable-stayed and prestressed structures.
Our solutions provide stress and strain measurements and detect hidden defects, such as age-related corrosion and other failures before they become visible.
Our solutions for assessing hidden defects and signs of premature structural aging
Escan
Void and white paste detection in cement grouted external cables and external prestressing ducts:
External prestressing cables are connected to the structure at their extremities. A failure in their free length significantly weakens the structure as the cable loses its reinforcement capacity.
Escan, developed in partnership with University Gustave Eiffel (UGE), allows defect detection along the cable length that highlight the risks of failure. It allows owners to anticipate maintenance and then ensure performance and durability of the structure.
Uscan
Health qualification of tensioned cables by ultrasonic measurement of each individual wire:
Uscan qualifies the health of tensioned cables at their anchorage zone via individual ultrasonic measurements of each wire. Stay cables and post tensioning cables are critical components for resistance and safety of infrastructure. They are protected against corrosion; however, in some cases, moisture can ingress into the anchorage and the state of the tendons is unknown until it is too late.
Uscan, developed in partnership with UGE, is the only technology that allows owners to know the state of the strands in the inaccessible anchorage area. The guided wave sent from the tip of each wire maps the general condition of the cable at the anchorage zone.
Our solutions for measuring loads and stresses in cable-stayed and prestressed structures
Slotstress
Measurement of the effective residual stress in a concrete structure:
Slotstress allows an understanding of the load distribution in a structure and verifies its acceptability with regards to the resistance of the material or any anticipated increase of loading over time. During its lifetime, the load distribution inside a structure can change due to external causes or a slow deterioration of the structure. At some stage, the loads become incompatible with the safety of the structure and its users.
Slotstress allows engineers to setup an optimized maintenance strategy and calculate necessary asset reinforcement.
Upus®
Load measurement in pre-stressing bars and bolts:
Upus® verifies the structural reinforcement brought by prestressing bars. Pre-stressing bars or rods are used to assemble elements and provide structural resistance. The loosening or releasing of forces in these bars can initiate critical structural hazards; therefore, it is necessary to periodically verify the acceptability of the applied forces.
The Upus® technique uses ultrasonic wave propagation to measure the force in bars. An ultrasonic sensor/receiver is applied at one end of the bar and therefore can be applied to bars with only one accessible end.
Vibration analysis
Analysis of the vibratory behavior of cables to assess their loads and damping capacity:
The vibration method allows tension and damping measurements of stay cables, hanger cables and external prestressing tendons. Tension and damping characteristics of cables are two important parameters of cable supported structures. This information should be known during construction and rehabilitation works of the structures, but also during its lifetime to assure the functioning of the structure and its safety.
Modal analysis
Analysis of the vibratory behavior of a structure to assess its health by the variation of its eigenfrequencies:
Analysis of the vibratory behavior of a structure to assess its health by the variation of its eigenfrequencies:
Applied on structures, this method measures the eigenfrequency and observes their deviation from theoretical values or the initial value from construction. This change reveals the presence of defects, damage, or aging. Induced or natural vibration of the structure triggers a network of accelerometer located at specific points on the structure.
The method is particularly efficient to verify the general state of prestressed, tall, or complex structures (loss of prestressing, pylons, towers, buildings).
Why choose our SHM solutions?
Our SHM solutions facilitate proactive decision-making so that you can:
- View the status of your structures in real time
- Predict and optimize maintenance needs
- Ensure user safety
- Extend the operating service life of your structures
