Method for improving bridge strain monitoring sensitivity

Abstract

The invention discloses a method for improving bridge strain monitoring sensitivity. The method comprises the steps of 1) setting a stressed component into a plurality of measurement segments with different cross sectional areas along the longitudinal direction; 2) arranging a sensitive element on a measurement section, with a small section area, of the stressed component; 3), fixing the two endsof the stressed component along the stressed direction of a bridge. A stressed component is set into a plurality of measurement segments with different cross-sectional areas along the longitudinal direction. After the two ends of the stressed component are fixed along the stressed direction of a bridge, the stress of the measurement sections of different sectional areas on the stressed component is different as the stressed component synchronously deforms along with the bridge. The measurement sections with large cross sectional area are poor in stress sensitivity, and the measurement sectionswith small cross sectional areas are good in stress sensitivity. The sensitive element is arranged on a measurement section with a small cross sectional area, so that the stress sensitivity of the sensor is expanded. The sensitivity of the temperature is identical, so that the stress monitoring sensitivity of a bridge can be improved.

Description

technical field [0001] The invention relates to the field of bridge strain monitoring, in particular to a method for improving the sensitivity of bridge strain monitoring. Background technique [0002] Bridge stress and strain are an important index of bridges, but the strain values ​​are different in different parts of the bridge. In the process of measuring the key points of the bridge, the magnitude of the stress and strain is different. In some positions, the total strain is tens to hundreds of micro-strains. In engineering, strain sensors installed at both ends are usually used to measure To monitor the stress and strain of the bridge, the measurement principle is as follows: on the sensor, there is a stressed member of the bridge that produces consistent deformation. The stressed member is in the shape of a long bar with sensitive elements on it. After the measured part, the sensitive element will deform synchronously with the bridge, so as to measure the stress and s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for improving the sensitivity of bridge strain monitoring in view of the problem that the measurement sensitivity is not enough and affects the measurement accuracy when monitoring bridge stress and strain at present. , so that different parts of the stressed member have different deformation sensitivities. When the sensitive element is installed on the deformed sensitive part of the stressed member, the bridge strain monitoring sensitivity can be improved and the monitoring accuracy requirements can be met.

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