Problematic cable/concentrated load progressive recognition method on basis of linear displacement cable power monitoring

Abstract

The invention relates to a problematic cable / concentrated load progressive recognition method on the basis of linear displacement cable power monitoring, which is based on cable power monitoring. Bracket linear displacement, cable structure temperature and ambient temperature are monitored to determine whether a mechanical calculation reference model of the cable structure needs to be updated, thereby obtaining a mechanical calculation reference model of the cable structure counting in the bracket linear displacement, cable structure temperature and ambient temperature; and the calculation is performed on the basis of the model to obtain unit-damage monitored quantity value change matrix. The noninferior solution of the evaluated object current nominal damage vector is calculated according to the near linear relationship among the monitored quantity current value, monitored quantity current initial value vector, unit-damage monitored quantity value change matrix and unknown evaluated object current nominal damage vector, thereby eliminating the influence of interference factors and recognizing the concentrated load variation and problematic cable in the presence of bracket linear displacement and 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 stay cables, main cables, slings, tie rods, etc. The common point of this type of structure is the cable , Cables or rods that only bear tensile loads are supporting components. For convenience, this method describes this type of structure as a "cable structure", and all load-bearing cables, load-bearing cables, and all bearing cables that only bear axial The rods subjected to tensile or axial compression loads (also called two-force rods) are collectively referred to as "cable systems" for convenience. In this method, the term "supporting cables" is used to refer to load-bearing cables, load-bearing cables and only The rod that bears axial tension or axial compression load is sometimes referred to as "cable" for short, so when the word "cable" is used later, it actually refers to a two-for...

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