Strain gauge device for measuring the deformation CONCRETE CONCRETE STRUCTURES

摘要

Strain gauge device for measuring the deformations of concrete reinforced concrete structures can be used in dynamic and static tests these structures. The apparatus consists of two strain gauges, the working and compensation. Both the strain gauge through a multi-core cable connected to a multi-channel measurement system for the half-bridge circuit. Each strain gage is composed of a sensing element in an array, adhered to the dielectric substrate. In place of soldering lead wires and the insulating substrate has a lattice. Main strain gage is attached by adhesive directly on the concrete. Compensation gage is bonded on a rigid metal substrate. The metal substrate is attached to the dielectric spacer, and the last - on the concrete test sample. On top of the two strain gauges are covered with thermal insulation cover. Compensation gage not associated directly with concrete, compensates for the results obtained during the tests, i.e. to eliminate the effect of temperature on the readings rebar deformation and thereby increase the accuracy of the results. 1 NRM f ly-1-yl.