Long term monitoring methods for structure stress of bridge

A bridge structure and stress technology, which is applied in the field of long-term monitoring of bridge structure stress, can solve the problems that sensors cannot achieve long-term monitoring, fail to achieve monitoring results, and disconnect

Inactive Publication Date: 2009-02-11
CHONGQING JIAOTONG UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The pre-embedded method can solve the monitoring problem of constant load stress, but it cannot realize long-term monitoring due to the life of the sensor; the surface mount sensor has the advantage of being replaceable, but it cannot solve the problem of constant load stress monitori

Method used

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  • Long term monitoring methods for structure stress of bridge
  • Long term monitoring methods for structure stress of bridge
  • Long term monitoring methods for structure stress of bridge

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Embodiment Construction

[0030] The long-term monitoring method of the bridge structural stress of the present invention is: 1) monitor the structural stress of the bridge through the pre-embedded sensor and the surface-mounted sensor respectively, 2) establish the stress-time relationship curve of the monitoring value of the pre-embedded sensor and the surface-mounted sensor respectively F(t) and f(t), 3) Calculate the correlation function G(t) between the stress-time relationship curve F(t) and f(t), 4) After the embedded sensor fails, the surface-mounted The stress-time relationship curve f(t) of the sensor monitoring value and the correlation function G(t) reverse the stress-time relationship curve F(t) of the bridge structure under the action of dead load + live load.

[0031] Step 1): Embedded sensors and surface-mounted sensors:

[0032] See attached figure 1 , during the construction period, according to the stress characteristics of the bridge structure, the pre-embedded sensors are set insi...

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Abstract

The invention discloses a long-term monitoring method for bridge structural stress. The method comprises the steps: monitoring the structural stress of a bridge through a pre-embedded sensor and a surface mounting sensor; respectively building stress-time curve of the pre-embedded sensor and the surface mounting sensor to seek a correlated parameterization function of two stress-time curve; and reversely educing the stress of the bridge structure under the action of dead load and live load by combining the stress result of the surface mounting sensor and the correlated function, after the pre-embedded sensor is ineffective. The invention has the advantages that the method analyzes and induces the correlation obtained by two stress monitoring means of the pre-embedded sensor and the surface mounting sensor, realizes the complementary advantages of the two stress monitoring means, and realizes long-term safety monitoring for the bridges in operation period.

Description

technical field [0001] The invention relates to a bridge structure stress long-term monitoring technology, in particular to a bridge structure stress long-term monitoring method. Background technique [0002] In recent years, with the rapid development of bridge construction, the structure and function of bridges have become more and more complex, and the scale of the project has also become larger and larger. Researchers from various countries believe that the research on the health monitoring of bridges under operating conditions is urgent; through monitoring and evaluating the structural status of bridges, the purpose of ensuring safe operation of bridges and avoiding bridge safety accidents can be achieved; at the same time, monitoring information can be Provide basis and guidance for bridge maintenance, repair and management decision-making. [0003] The long-term stress monitoring of the bridge in the operating state is realized in two ways: pre-embedded and surface-m...

Claims

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Application Information

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IPC IPC(8): G01L1/00
Inventor 周建庭姚勇房锐岳军声武电坤杨娟
Owner CHONGQING JIAOTONG UNIVERSITY
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