Multi-functional node locking device to monitor and enhance structural stability

Abstract

The invention relates to a multifunctional node lock catch device for monitoring and enhancing structural stability. A sleeve or a sleeve disc, a sensor and a matched supporting element are additionally arranged in a node area formed by converging and connecting a plurality of rod pieces. Two ends of the sleeve are locked on the rod pieces on two sides of the plane joint, the periphery of the sleeve disc is locked on the rod pieces on the periphery of the space joint, and therefore the rod pieces and the sleeve or the sleeve disc are jointly stressed. When the structure begins to be unstable,node deformation is caused to be rapidly increased, after the deformation exceeds a certain range, a sensor arranged below the node is triggered, and an early warning signal is sent out; and meanwhile, the joint and the sleeve or the sleeve disc are integrally stressed, internal force redistribution occurs, and the purpose of preventing or delaying structural instability is achieved. The out-of-plane gap between the sleeve and the rod pieces is reduced, and the out-of-plane rigidity and stability of the structure can be enhanced. By means of the characteristic that the multifunctional joint lock catch is detachable, the multifunctional joint lock catch is convenient to install in a newly-built structure, suitable for being additionally arranged in a reinforcing structure and capable of being used for temporarily enhancing the structural stability in construction.

Description

technical field [0001] The invention relates to the field of structural health monitoring and stability control, in particular to a multifunctional node locking device for monitoring and enhancing structural stability. Background technique [0002] Structural health monitoring refers to real-time monitoring of structural components and identification of structural damage, and its observed values ​​are an important basis for structural maintenance. Moreover, in the current design and use of steel structures, stability has become a controlling factor, especially since the construction and installation of steel structures have not yet formed a complete structure, the stability and bearing capacity have not reached the design value, and safety accidents are most likely to occur. Therefore, the monitoring of steel structure instability has been paid attention by domestic and foreign scholars, and some progress has been made. As a branch of structural health monitoring, steel str...

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Problems solved by technology

[0003] At present, there are mainly the following types of steel structure instability monitoring devices. In 1997, Guo Jingjun published "Using GPS to monitor the dynamic displacement of tall buildings" in "Engineering Investigation", and in 1999, Ge Maorong published in "Journal of the PLA Institute of Surveying and Mapping" Published "Establishment and Application of GPS Engineering Structure Monitoring System" and "GPS Construction Measurement of Humen Bridge Piers, Towers, and Anchors" published by Cen Minyi in "Journal of Southwest Jiaotong University" in 1999, pointed out that the GPS monitoring system can be used to monitor tall buildings. Deformation detection, this method has high precision and large range, but it is susceptible to interference from surrounding random signals

In 2009, Qian Jiaru published "Peking University Gymnasium Steel Roof Construction Simulation and Monitoring" in "Journal of Civil Engineering", and in 2012, Wang Xiuli published "Large-span Steel Structure Construction Loading Health Monitoring and Simulation Analysis" in "Spatial Structure" ", Li Hui's "National Swimming Center Steel Structure Construction Unloading Process and Operation Period Strain Health Monitoring and Calculation Simulation Analysis" published in the "Journal of Civil Engineering" in 2012, etc. Structural health monitoring during the process and operation stage can provide reference for the layout of measuring points in similar projects in the future; further, some scholars have proposed to monitor the instability and deformation of reticulated shell structures or welded hollow node balls through acoustic emission devices, but the measurement may have certain degree of difficulty

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