Assessment method for residual bearing capacity of existing space grid structure

Abstract

The invention relates to an assessment method for the residual bearing capacity of an existing space grid structure. The assessment method is characterized by comprising the following steps: 1) determining the deformation reason of each deformed bar in the existing space grid structure; 2) establishing the model of each deformed bar according to the deformation reason of the deformed bar and correspondingly setting the model correction parameters; 3) loading and correcting the model of each deformed bar according to the deformation cause of the deformed bar and the set model correction parameters so as to obtain the model after loading and correction of each deformed bar; and 4): obtaining the existing space grid structure model based on the loaded and corrected model of each deformed barand analyzing the existing space grid structure model so as to complete assessment of the residual bearing capacity of the existing space grid structure. The assessment method can be widely used in the field of bearing capacity calculation and structural assessment and identification of the existing space grid structure.

Description

technical field [0001] The invention relates to an evaluation method for the residual bearing capacity of an existing spatial grid structure, and belongs to the fields of bearing capacity calculation, structure evaluation and identification of the existing spatial grid structure. Background technique [0002] Spatial grid structures mainly include steel structures such as grid frames and reticulated shells. Because of their strong spanning ability, clear force, high overall rigidity, and convenient fabrication and installation, they are widely used in large public buildings, industrial plants, and other fields, such as Roofs of airport terminals, large stadiums or performance venues, large industrial plants, coal and stockyard sheds, etc. This type of project is of high importance. After completion, regular or irregular structural safety inspections, assessments or structural safety monitoring are required to ensure structural safety. [0003] Conduct on-site safety inspect...

AI Technical Summary

Problems solved by technology

The overall modeling and analysis of the space grid structure with bending deformation rods can simplify the bending deformation rods into spring elements with specific stiffness curves, or model the bending deformation rods according to the actual deformation conditions, the latter The accuracy is higher and the calculation is more reliable, but there are many problems in the modeling process

The most important problem is that when measuring the bending deformation of the member, the member and the overall spatial grid structure have been loaded, but the model during modeling is a no-load model. If the actual measured deformation is directly used to build a rod with bending deformation After the overall space grid structure is loaded, the deformation of these rods with bending deformation will further increase, which is inconsistent with the actual situation

However, in the prior art, there is no evaluation method for spatial grid structure modeling and detailed analysis of bearing capacity of members with bending deformation

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