Bridge damage evaluation method based on deflection monitoring
A damage assessment and bridge technology, applied in the direction of measuring devices, elastic testing, machine/structural component testing, etc., can solve problems such as casualties, bridge deflection monitoring system errors, frequent bridge collapse accidents, etc., to reduce system damage The effect of reducing errors, reducing property losses, and ensuring personal safety
Pending Publication Date: 2022-02-01
ZHEJIANG UNIV OF TECH
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Problems solved by technology
[0002] With the development of social transportation infrastructure, the number of bridges continues to increase, and the existing bridges are accompanied by various damages due to various reasons, and bridge collapse accidents occur frequently, causing casualties
The existing bridge health assessment basically adopts the method of professional inspection, and the bridge deflection monitoring system has large errors. In order to complete the bridge health assessment more efficiently, economically and professionally, it is necessary to develop a new damage assessment method to avoid more accidents
Method used
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Embodiment
[0029] Based on the theorem of large numbers to detect the effectiveness of monitoring equipment, use the formula:
[0030]
[0031] Taking the deflection sample data in the same cycle time, we get Take the average value of the calculated bridge deflection (If the system error of the bridge monitoring equipment is 20%), take the error value of the bridge monitoring system ε=10.67483*0.2=2.134966mm, and substitute it in to meet the requirements.
[0032] Using the above-mentioned evaluation operation method, it is obtained as figure 2 The schematic diagram of early warning of graded deflection changes is shown. The solid line curve in the figure is the deflection curve recorded in real time. The two dotted lines correspond to the calculated range of bridge deflection fluctuations in a certain period of time under the same conditions. The deflection fluctuations in the figure are The range is 8.67483~12.67483mm. When the obtained deflection value exceeds the deflection f...
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The invention discloses a bridge damage evaluation method based on deflection monitoring. The method comprises the following steps: acquiring weight information of a specific vehicle; acquiring the position, speed information and corresponding deflection value of the specific vehicle when the specific vehicle passes through the bridge; establishing a deflection-vehicle information sample database according to the collected information; according to the deflection-vehicle information sample database, analyzing the deflection value of the specific vehicle under the same condition, and therefore, determining the deflection value change range; and according to the deflection value change range, verifying the accuracy of the sample data by using the large number theorem, and setting graded deflection change early warning to realize bridge damage evaluation. The deflection-vehicle information sample database is established and sample data is processed according to the obtained information of the vehicle weight, the measurement time, the speed, the position and the deflection of the specific vehicle, the bridge damage condition is evaluated and monitored in real time, the early warning effect is achieved before a bridge accident occurs, the personal safety is guaranteed, and the property loss is reduced.
Description
technical field [0001] The invention belongs to the technical field of bridge monitoring, and in particular relates to a bridge damage assessment method based on deflection monitoring. Background technique [0002] With the development of social transportation infrastructure, the number of bridges continues to increase, and the existing bridges are accompanied by various damages due to various reasons, and bridge collapse accidents occur frequently, causing casualties. The existing bridge health assessment basically adopts the method of professional inspection, and the bridge deflection monitoring system has large errors. In order to complete the bridge health assessment more efficiently, economically and professionally, it is necessary to develop a new damage assessment method to Avoid more accidents. Reasonable application of bridge deflection monitoring data and relevant knowledge of probability theory can improve bridge monitoring accuracy and further replace bridge loa...
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IPC IPC(8): G01M5/00
CPCG01M5/0008G01M5/0033G01M5/005
Inventor 彭卫兵徐梦喆范大军
Owner ZHEJIANG UNIV OF TECH