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A method for early warning of bridge strain

A bridge, temperature strain technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as damage, difficult to find structures, bridge damage and slow performance, and achieve the effect of avoiding data errors

Active Publication Date: 2019-02-22
HEFEI ZEZHONG CITY INTELLIGENT TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the damage and performance degradation of the bridge is a slow and subtle process. It is difficult to detect the damage of the structure if the data amplitude exceeds the early warning value, and it is difficult to ensure the safe operation of the bridge. and preventive purposes

Method used

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  • A method for early warning of bridge strain
  • A method for early warning of bridge strain
  • A method for early warning of bridge strain

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Embodiment Construction

[0026] If there are multiple alarms and response amplitudes exceeding the standard in the bridge system, or major emergencies (such as vehicle, ship collision or earthquake, etc.), it is necessary to identify whether the bridge structure has changed, and this method can be used for analysis . The damage judgment of the bridge needs to compare the two states of the bridge. It can be analyzed by selecting the data in a normal time period to obtain the relationship sample between temperature and strain at each measuring point of the bridge, such as figure 1 As shown, the specific operation is as follows:

[0027] S1. Select the temperature data and bridge strain data of a certain detection point in 15 days. The trend of the daily strain data is as follows figure 2 As shown, the strain data consists of two parts, one is the strain response caused by temperature, and the other is the strain response caused by external loads (mainly vehicles), among which, the strain response caus...

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Abstract

The invention discloses a method for early warning of bridge strain, which comprises the following steps: S1, selecting temperature data and bridge strain data of a certain detection point for severaldays; S2, decomposing the daily bridge strain data of the detection point by the rain flow counting method to obtain the decomposed diagram; S3, obtaining the temperature difference data according tothe daily temperature data; S4, performing least square fitting on the temperature difference data in step S3 and the daily temperature strain cycle amplitude data in step S2 to obtain a strain-temperature difference relationship fitted curve; S5, S5. Shifting the set value upward and downward in the fitting curve of the strain-temperature difference relationship, and obtaining the upper limit curve and the lower limit curve respectively obtained;; S6, calculating the amplitude of the daily temperature strain cycle after the detection point and the temperature difference data after the detection point, and judging whether the amplitude of the daily temperature strain cycle after the detection point is between the upper limit curve and the lower limit curve; If the amplitude of the daily temperature strain cycle is not between the upper limit curve and the lower limit curve, the system sends out an early warning. The invention can reflect the actual operation state of the bridge.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a bridge strain early warning method. Background technique [0002] Bridge engineering is a lifeline project related to the coordinated development of society and economy. Especially with the rapid development of expressways in our country, and the completion of all 12 national trunk lines of the "five vertical and seven horizontal" national highways, the development focus of the bridge industry will gradually shift from "new construction" to "management and maintenance". However, in recent years, due to the significant effects of factors such as overloading, collisions, illegal operations, natural disasters or environmental changes, the number of dangerous bridges in my country has remained high, and major infrastructure safety accidents at home and abroad have occurred frequently. In addition, 40% of the bridges in our country were built in the 1990s and before, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2119/04G06F2119/08G06F30/20G06F30/13G06F2119/06
Inventor 胡浩然付明李祥东袁宏永苏国锋汪曙光楚帅薛海斌余小龙
Owner HEFEI ZEZHONG CITY INTELLIGENT TECH CO LTD
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