The strain stress online monitoring system is used to measure the loads and bending moment in the concrete, steel beams and steel members of the building. The vibrating wire strain gauge based on vibrating wire technology is used to sense the variation of the load in booth directions (tension or compression), the system also contain programmable logging system that satisfy automatic data collection and perform the needed calculations, the logging system include a computer software that collect the data from logging system and view the collected data with several methods like different types of graphs and data tables, the software also contain the FTP package that transfer the collected data to the web based online monitoring server that can satisfy online monitoring from any where in the world.
Applications
Strain Gauges for Steel
Weldable strain gauges measure strain in steel. Typical applications include:
- Monitoring stresses in structural members of buildings, bridges, tunnel linings and supports during and after construction.
- Monitoring the performance of wall anchors and other post-tensioned support systems.
- Monitoring loads in strutting systems for deep excavations.
- Measuring strain in tunnel linings and supports.
- Monitoring areas of concentrated stress in pipelines.
- Monitoring distribution of load in pile tests.
Strain Gauges for Concrete
Embedment strain gauges measure strain in concrete. Typical applications include:
- Measuring strains in reinforced concrete and mass concrete.
- Measuring curing strains.
- Monitoring for changes in load.
- Measuring strain in tunnel linings and supports.
Types of Strain Gauges
VW Spot-Weldable Strain Gauge
Designed to measure strain in steel beams, this vibrating wire strain gauge is spot-welded to the surface of the steel. A sensor is then fixed atop the gauge. Readings are obtained with a VW readout or with a data logger.
Advantages: Patented low-profile design reduces errors caused by bending. Spot welding, as opposed to arc-welding, has negligible effect on the steel. The gauge is pre-tensioned for easy installation, requires very little surface preparation, is very durable and economical, has a built-in temperature sensor, and intrinsically reliable VW signal transmission.
Limitations: Requires spot-welder, not suitable for high-speed dynamic measurements.
For more information please refer to datasheet.
VW Spot-Weldable Strain Gauge
VW Arc-Weldable Strain Gauge
Designed to measure strain in steel members, this vibrating wire strain gauge is held to the structure by mounting blocks are arc-welded to the structure. Groutable mounting blocks are available for concrete structures. Readings are obtained with a VW readout or data logger.
Advantages: Wire tension can be adjusted to maximize available range, requires very little surface preparation, can be repositioned easily, very durable, reliable VW signal transmission, built-in temperature sensor.
Limitations: Higher profile than spot-weldable gauge, arc-welding not suitable for certain applications, not suitable for high-speed dynamic measurements.
For more information please refer to datasheet.
VW Arc-Weldable Strain Gauge
VW Embedment Strain Gauge
Designed to measure strain in reinforced concrete or mass concrete, this vibrating wire strain gauge is typically tied to a reinforcing cage. Readings are obtained with a VW readout or data logger.
Advantages: Provides good conformance and minimizes inclusion effects, has built-in temperature sensor and intrinsically reliable VW signal transmission.
For more information please refer to datasheet.
VW Embedment Strain Gauge
