Strain monitoring-based progressive method for identifying slack cables during generalized displacement of support saddle

Abstract

The progressive method of identifying slack cables based on strain monitoring during support generalized displacement is based on strain monitoring, and by monitoring the generalized coordinates of structural supports, when used to identify loose support cables, the current value vector of the monitored quantity is The linear relationship between the initial numerical vector of the virtual unit damage, the numerical change matrix of the monitored quantity of virtual unit damage, and the current nominal virtual damage vector is approximate. In order to overcome this defect, a method of using the linear relationship to approximate the nonlinear relationship is given, which can be After the virtual damaged cable is identified, and the real damaged cable is identified by non-destructive testing and other methods, the remaining virtual damaged cable is the loose support cable. According to the relationship between the degree of relaxation and the degree of virtual damage, it can be determined that the adjustment The length of the cable.

Description

Technical field [0001] In the broad -sense displacement of the branch (for example, the wide -point displacement of the branch refers to the angle displacement of the thread displacement of the branch along the X, Y, and Z axis around the X, Y, and Z axis; corresponding to the broad -point displacement of the branch, the general coordinates of the support of the support of the supportWhen the coordinates of X, Y, Z axis and the corner coordinates of the X, Y, and Z axis of the branch seat), the invention based on the monitoring of the equivalent of the strain to identify the cord support structure (especially the large cable structure, such as large -scale large -scale structures, such as large scaleThe cable system (referring to all support cables) in the cable system (referring to all support cables) of the cable is required, and the specific long -term adjustment volume is given, which is the field of engineering structure security. Background technique [0002] The cable syst...

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Problems solved by technology

[0003] Changes in the health state of the supporting cable system (such as relaxation, damage, etc.) will cause changes in the measurable parameters of the structure, such as the deformation or strain of the cable structure will change. In fact, the change of strain includes the health of the cable system State information, that is to say, the health status of the structure can be judged by using the structural strain data, which can be based on strain monitoring (the monitored strain is called "monitored quantity" in the present invention, and the "monitored quantity" mentioned later refers to the monitored strain) to identify damaged cables, the monitored quantity is not only affected by the health status of the cable system, but also affected by the generalized displacement of the cable structure support (which often occurs), and there is no public and effective health monitoring Systems and methods address this problem

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