A translational and progressive identification method for damaged cables and supports for hybrid monitoring during temperature changes

Abstract

The invention relates to a damaged cable and support translation progressive identification method on the basis of the hybrid monitoring during temperature variation. According to the damaged cable and support translation progressive identification method, on the basis of the hybrid monitoring, the translation displacement of a support, the temperatures of cable structures, the environment temperature and the damage degrees of damaged cables are monitored to determine whether a mechanical calculation reference model of the cable structures needs to be updated so as to obtain a novel mechanical calculation reference model of the cable structures, in which the translation displacement of the support, the damage degrees of the damaged cables and the temperature are counted; and on the basis of the new model, according to approximate linear relations between a current value vector of a monitored quantity and a current initial value vector of the monitored quantity, a value unit change matrix of the unit damage monitored quantity and a current nominal damage vector to be obtained, when the temperature is changed, the damaged cables and the translation displacement of the support can be accurately identified.

Description

technical field [0001] Cable-stayed bridges, suspension bridges, truss structures and other structures have one thing in common, that is, they have many parts that bear tensile loads, such as cable-stayed cables, main cables, slings, tie rods, etc. , cables, or rods that only bear tensile loads are supporting components. For convenience, this method expresses this type of structure as a "cable structure". As the ambient temperature changes, the temperature of the cable structure will also change. When the temperature of the cable structure changes, this method is based on mixed monitoring to identify the support system of the cable structure (referring to all load-bearing cables, and all supporting For the rods under tensile load, for the sake of convenience, this patent refers to all supporting components of this type of structure as "cable system", but in fact, the cable system not only refers to the supporting cables, but also includes rods that only bear tensile loads , t...

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Problems solved by technology

In addition to being affected by the health state of the cable system and the translational displacement of the support, the monitored quantity will also be affected by the temperature change of the cable structure (which often occurs). Under the condition that the temperature of the cable structure changes, if the monitored quantity can It is of great value to the safety of the cable structure to realize the identification of the translational displacement of the support cable and the support with health problems. At present, there is no public and effective health monitoring system and method to solve this problem.

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