Bridge deflection detection method

A detection method and bridge deflection technology, which can be used in elastic testing, machine/structural component testing, measuring devices, etc., can solve the problems of increasing the difficulty and complexity of inclinometer method promotion, and achieve a clear mechanical concept, simple and accurate methods. Excellent effect

Inactive Publication Date: 2016-08-31
SHANGHAI TONGJI CONSTR QUALITY INSPECTION STATION
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Problems solved by technology

[0005] 2. The above-mentioned methods all involve complex mathematical calculations. First, they need to solve the eigenvalues ​​and eigenvectors of the bridge under test, which increases the difficulty of popularizing the inclinometer method to a certain extent.

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Embodiment Construction

[0032] For Euler beams in mechanics, the relationship between beam deflection, cross-section inclination and mid-surface curvature is a relationship between differential and integral. Specifically, the first derivative of the bridge deflection function is the measured point on the bridge The inclination function, the second derivative of the bridge deflection function is the curvature function of the bridge midpoint, correspondingly, the first integral of the curvature function of the bridge midpoint is the inclination function of the point to be measured, and the first integral of the inclination function of the point to be measured is the bridge deflection function. More specifically, in practical applications, several inclination values ​​at certain designated points of the bridge are measured by an inclinometer, and then an approximate distribution map of the inclination value-bridge length is drawn based on the several inclination values, and the approximate distribution m...

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Abstract

The invention provides a bridge deflection detection method comprising the following steps that a. multiple inclination angle values corresponding to multiple specified points on a bridge are acquired; b. fitting of an inclination angle function f(x) is performed based on the multiple inclination angle values; and c. a deflection value I of a point to be detected is acquired according to the formula (which is expressed in the specification), wherein the interval [a, b] is an interval formed by the initial point of the inclination angle function and the point to be detected. The cross section inclination angle values measured by an inclinometer are processed by adopting an immediate integration method so that the mechanical concept is clear, the method is easy and convenient, the accuracy is better than that of a least square method, and other bridge information is not required apart from the cross section rotating angle and the cross section position.

Description

technical field [0001] The invention belongs to the field of bridge detection, and in particular relates to a bridge deflection detection method. Background technique [0002] The deflection of the bridge is used to measure the bending deformation of the bridge. By detecting the deflection of the bridge, you can experience the design and construction quality of the bridge. At the same time, by monitoring the deflection changes at specific positions of the bridge on a regular or real-time basis, you can also understand the changes in the stiffness of the bridge, so as to monitor Health status of the bridge structure. [0003] The traditional bridge deflection measurement methods mainly include GPS method, total station method, traditional leveling method, connecting pipe or pressure transmitter method. In recent years, the inclinometer method has been gradually applied to bridge deflection detection. Several inclination values ​​of several sections of the bridge are measured...

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Application Information

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IPC IPC(8): G01M5/00
CPCG01M5/0008
Inventor 王素娟王勤蒋洪新龚振球史家钧
Owner SHANGHAI TONGJI CONSTR QUALITY INSPECTION STATION
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