Method for identifying problem cable and support translation based on hybrid monitoring during temperature change

Abstract

The utility model relates to a method for identifying a problem cable and support translation based on hybrid monitoring during temperature change. The method comprises the following steps: based on the hybrid monitoring, deciding whether a mechanical calculation benchmark model of a cable structure needs to be updated by monitoring the temperature of the cable structure and the environmental temperature, and obtaining the mechanical calculation benchmark model of the cable structure with the temperature of the cable structure and the environmental temperature; and on the basis of the model, calculating to obtain the unit change matrix of a unit-damaged monitored quantity. According to an approximate linear relationship among the current numerical vector of a monitored quantity, the current initial numerical vector of the monitored quantity, the unit change matrix of the unit-damaged monitored quantity, a unit-damaged or unit translation and displacement vector and the current name-damaged vector of an unknown evaluated object, the non-inferior solution of the current name-damaged vector of the evaluated object is calculated. Thus, damaged cables, slack cables and the translation and displacement of supports can be quickly identified during temperature change.

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 damaged cables and loose cables in the support system of the cable structure (for truss structures, it means Damaged or loose rods that only bear tensile loads) and translational displacements of bearings belong to the field of health monitoring of engineering structures. The supporting system of the cable structure refers to all load-bearing cables and all supporting rods that o...

AI Technical Summary

Problems solved by technology

In addition to being affected by the health status of the cable structure, the monitored quantity will also be affected by the temperature change of the cable structure (which often occurs). The identification of support cables and support translational displacements with health problems is of great value to the safety of cable structures. At present, there is no public and effective health monitoring system and method to solve this problem.

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