Node rigid domain identification method, device and apparatus based on monitoring data

Abstract

The invention relates to a node rigid domain identification method, device and apparatus based on monitoring data, and the method comprises: determining a strong correlation rule of a rigid domain length and a stress response change rate based on a basic database and an Apriori algorithm; determining an actual arrangement position of the monitoring sensor according to the strong association rule;acquiring actual stress response of each actual arrangement position node through a monitoring sensor; determining the actual stress response change rate of each actual arrangement position node underdifferent working conditions; and identifying the node rigid domain length corresponding to the actual stress response change rate based on the mapping relationship between the node stress response change rate and the node rigid domain length established by a random forest algorithm, accurately obtaining the node rigid domain, and providing parameter guidance suggestions for correction and structural design of a finite element model without the influence of working condition change.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a monitoring data-based identification method, device and equipment for a rigid region of a node. Background technique [0002] In actual engineering, the node is located in the area where the members meet, and a relatively rigid node area, that is, the rigid domain, will be formed with the nearby area. In actual engineering, the contribution of the nodal rigid field to the structural stress analysis is seldom considered, but it is used as a safety reserve, and the calculation of the nodal rigid field is complex and cannot be directly measured. Generally, it is judged through experiments and experience, and it is difficult in engineering design. application. At present, the research on the nodal rigid domain mainly focuses on the simulation and experimental research of the nodal rigid domain. The location of the system measurement points is limited, and the layout is m...

AI Technical Summary

Problems solved by technology

In the process of construction and use, the joints are located in the part of the whole structure where the stress is complex and concentrated, and damage accumulation will inevitably occur, resulting in changes in the rigid domain of the joints, but the rigid domain of the joints cannot be directly determined

[0003] Only the monitoring data of the measuring points cannot express the real complex stress state of the nodes, so that the changed rigid domain of the nodes cannot be accurately obtained, and at the same time, the finite element model cannot be accurately corrected, and the bearing capacity and safety of the nodes cannot be evaluated. correct assessment

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