Progressive type healthy monitoring method of rope system based on angle monitoring during support settlement

Abstract

The invention relates to a progressive type healthy monitoring method of a rope system based on angle monitoring during support settlement, which is based on the angle monitoring and determines whether a mechanical calculation reference model of a structure needs to be updated again or not by monitoring the coordinates of a support of the structure. In consideration of the condition that a linear relationship among the vector of the current numerical value of the quantity to be monitored, the vector of the initial numerical value of the quantity to be monitored, a change matrix of the unit damage quantity to be monitored and a current nominal damage vector is approximate, the invention provides a method using the linear relationship to sectionally approach to a nonlinear relationship in order to overcome the defect, a big interval is divided into a plurality of continuous small intervals, the linear relationship is accurate enough in each small interval, and the non-inferior solution of the current rope damage vector can be calculated in each small interval by utilizing the proper algorithms of a multi-objective optimization algorithm and the like, so that the position of a damaged rope and the damage degree thereof can be more accurately determined.

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 discloses a progressive method based on angle monitoring to identify the support system of the cable structure (referring to all load-bearing cables, and all supporting members that only bear tensile loads, for For the sake of convenience, this patent refers to all the 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 the damaged cables in the rods that only bear tensile loads (for The truss struc...

AI Technical Summary

Problems solved by technology

After the health state of the cable system changes, it will cause changes in the measurable parameters of the structure, such as the change of the angular coordinates of any imaginary straight line passing through each point of the cable structure (for example, any one of the tangent planes at any point on the surface of the structure the change of the angular coordinate of the straight line passing through the point, or the change of the angular coordinate of the normal line at any point on the surface of the structure), in fact, the change of the structural angle contains the health status information of the cable system, that is to say, the structural angle data can be used to judge The health status of the structure can be based on angle monitoring (the invention refers to the monitored angle data as "monitored quantity", and the "monitored quantity" mentioned later refers to the monitored angle data) to identify damaged cables, and the monitored In addition to being affected by the health status of the cable system, the load will also be 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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