Health monitoring method of cable system based on cable force monitoring during support settlement

Abstract

The invention relates to a health monitoring method of a cable system based on cable force monitoring during support settlement; the health monitoring method is based on the cable force monitoring and decides whether the mechanical calculation benchmark module of a structure needs to be updated or not by the coordinates of the support of the monitoring structure; only when the coordinates of the support of the structure changes, the mechanical calculation benchmark module of the structure is updated, thus obtaining the new mechanical calculation benchmark module of the structure, which records the support settlement of the structure; based on the module, a unit damage monitored quantity transformation matrix is obtained by calculation. According to the approximately linear between the current numerical value vector of the monitored quantity and the initial vector of the monitored quantity, a unit damage monitored quantity transformation matrix, a unit damage scalar and the unknown current damage vector of the cable system, the noninferior solution of the current cable damage vector can be quickly figured out by using appropriate algorithms such as a multiple target optimization algorithm; and accordingly, the position and the damage degree of the damaged cable can be more accurately determined when the support settles.

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, and this type of structure is expressed as a "cable structure" in the present invention for convenience. When there is support settlement, the present invention identifies the support system of the cable structure based on cable force monitoring (referring to all load-bearing cables and all supporting rods that only bear tensile loads. For convenience, this patent refers to such All supporting parts of the structure are collectively referred to as "cable system", but in fact the cable system not only refers to the supporting cables, but also includes the damaged cables in the rods that only bear tensile loads (for truss structures, it refers to the damaged onl...

AI Technical Summary

Problems solved by technology

After the health state of the cable system changes, it will cause the change of the measurable parameters of the structure, such as the change of the supporting cable force. In fact, the change of the cable force contains the health state information of the cable system, that is to say, the cable force can be used Data to determine the health status of the structure can be based on cable force monitoring (this invention refers to the monitored cable force as "monitored amount", and the "monitored amount" mentioned later refers to the monitored cable force) to identify damaged cables. , the monitored quantity is not only affected by the health status of the cable system, but also affected by the settlement of the support of the cable structure (which often occurs). At present, there is no public and effective health monitoring system and method to solve this problem

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