Bridge performance degradation diagnosis method and system

Abstract

The invention discloses a bridge performance degradation diagnosis method and system, and relates to the technical field of bridge performance evaluation, and the method comprises the steps: obtaining the state of a bridge in a period of time, setting the state as a bridge reference state, obtaining the expansion joint displacement and the structure temperature of the bridge in the period of time, and constructing a first temperature-displacement similarity factor; setting a vehicle weight distribution mode and a beam bottom strain reference value of the bridge; obtaining and setting the state of the bridge in the next period of time as the daily operation state of the bridge, and obtaining the expansion joint displacement, the structure temperature, the number of vehicles with the vehicle weight not smaller than the vehicle weight distribution mode and the beam bottom dynamic strain data of the bridge in the period of time; constructing a second temperature-displacement similarity factor; when the number of the vehicles is not zero, obtaining the number of strain peak values not smaller than the beam bottom strain reference value; and constructing a state degradation factor, and determining the degradation degree of the bridge. According to the invention, the performance degradation degree of the bridge in service relative to the reference state can be evaluated timely and accurately.

Description

technical field [0001] The present application relates to the technical field of bridge performance evaluation, in particular to a method and system for diagnosing bridge performance degradation. Background technique [0002] At present, based on the rapid development of transportation capacity, the phenomenon of vehicle overloading driven by profit is becoming more and more serious, and even on some bridges with a long service life, there are cases of overweight vehicles passing. A large number of heavy vehicles may cause bridge performance degradation, shorten service life, and even lead to accidents such as bridge collapse, resulting in bad social impact. [0003] In related technologies, bridge assessment is mostly carried out through the bridge health monitoring system, which mainly combines finite element calculation and real-time response to judge whether the bridge exceeds the limit state of bearing capacity. However, the above method does not pay attention to the c...

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Problems solved by technology

[0004] In view of one of the defects existing in the prior art, the purpose of this application is to provide a bridge performance degradation diagnosis method and system to solve the problem in the related art that it is impossible to timely judge whether the performance of the bridge is degraded during service

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