Measurement Appratus of Longitudinal Displacement of Prestressed Concrete Bridge

摘要

invention PSC (Prestressed Concrete) Part of the point on the bridge piers and installed a reference point in the girders of both a device for measuring a throttle point in the direction of displacement. Equal amount of shrinkage and the difference of the displacement is measured at both points girder (girder), that are not included from the displacement amount of shrinkage due to temperature change can be estimated loss ginjangryeok introduced to the PSC girders. The throttle direction displacement delivery devices designed to deliver a fixed reference point only throttles lateral displacement of the fixed reference point of the top of the pier several directions, the displacement of the moving reference point located on the underside of the girder. In addition to calibration (gage factor) of the automatic measurements with automatic displacement meter is installed, install the vernier caliper (vernier calipers) of the measurement range is relatively wide and accurate manual displacement meter for stable long-term measurement of concrete strain years or 10 years or more Periodic assessment (calibration) is dual-- a measurement device