Troubled cable and supporting seat translation progressive-type identification method for combined monitoring during variation of temperature

Abstract

A troubled cable and supporting seat translation progressive-type identification method for combined monitoring during variation of the temperature is based on the combined monitoring and is characterized by determining whether a mechanical calculation benchmark model of a cable structure is required to update or not by monitoring the temperature of the cable structure, the ambient temperature and the health status of an estimated target, obtaining the mechanical calculation benchmark model of the cable structure considering the temperature of the cable structure and the ambient temperature, and obtaining a unit damage monitored quantity unit variation matrix on the basis of the model. Noninferior solution of the moment nominal damage vector of the estimated target is calculated according to an approximate linear relation between the monitored quantity moment numerical value vector and the monitored quantity moment initial numerical value vector, the unit damage monitored quantity unit variation matrix, the unit damage or the unit translation displacement vector and the moment nominal damage vector of the estimated target to be solved, so that according to the translation displacement of a damaged cable, a loosened cable and a supporting seat can be quickly identified when the temperature is varied.

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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