DETERMINATION OF STRUCTURAL DAMAGE TO BUILDINGS USING MICROSENSORS BASED ON STRAIN GAUGE TECHNOLOGY
F. Tegtmeier, M. Peters
Abstract:
In the supervision of buildings and structures, to guarantee the support strength and to detect structural damage due to ageing and varied utilisation at an early stage and at low cost, special measuring instruments are increasingly being developed. An important tool in the measuring techniques applied to determine loads and detect damage are strain gauge-based microsensors. These can protect the integrated precision resistance foils from the adverse ambient conditions prevailing in the vicinity of the structure and can easily be attached to the structure subject to supervision.
Investigations carried out within the scope of the project have so far concentrated on problems concerning the integration of the sensor into the structure. Work has been focused on both, a suitable design of the sensor and an appropriate selection of measurement points ensuring low impact on the structure, the possibility of subsequent attachment to existing objects, and high signal amplitudes in the case of changes in the built volumes. Investigations into potential applications of the sensors were carried out on the basis of a theoretical description and by practical experiments, simulating the structures' environment using suitable dummy structures and load transmitters. They are used to test the measuring method and, above all, to establish a matrix for the transfer of exactly defined states of external stress and strain to the strain gauges enclosed inside the sensor.
Keywords:
multicomponent microsensor, strain gauge, monitoring of buildings, encapsulated measuring device, dummy structure
Download:
IMEKO-WC-2000-TC20-P588.pdf
DOI:
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Event details
Event name:
XVI IMEKO World Congress
Title:

Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future

Place:
Vienna, AUSTRIA
Time:
25 September 2000 - 28 September 2000
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