Deformation-based earthquake damage reinforced concrete column crack width calculation method

Abstract

The invention discloses a deformation-based earthquake damage reinforced concrete column crack width calculation method, which comprises the following steps: assuming the magnitude of bending deformation, and carrying out iterative calculation according to the assumed value of the bending deformation to determine the axial force and bending moment borne by the section of an end part of an earthquake damage reinforced concrete column; calculating the shearing force borne by the earthquake damage reinforced concrete column according to the shearing deformation amount, and determining the bendingmoment and the shearing force actually borne by the earthquake damage reinforced concrete column; according to the bending moment and the shearing force, obtaining the maximum transverse crack widthand the maximum oblique crack width generated by the earthquake damage reinforced concrete column through calculation; and finally, adding the maximum transverse crack width and the maximum oblique crack width to obtain the crack width corresponding to the deformation of the earthquake damage reinforced concrete column. Compared with a traditional crack width detection method and technology, the method overcomes the defects that when crack detection is carried out on a traditional earthquake damage reinforced concrete column, measurement needs to be carried out one by one, efficiency is low, and errors are large, and has better practicability in damage evaluation of earthquake damage reinforced concrete columns.

Description

technical field [0001] The invention relates to a deformation-based calculation method for the crack width of an earthquake-damaged reinforced concrete column, which belongs to the technical field of seismic performance and damage assessment. Background technique [0002] Engineering structures will be damaged and destroyed under the action of earthquakes, and in severe cases, there may be a large number of casualties and property losses. Rapid and accurate seismic damage assessment of structures after earthquakes can evaluate the safety of structures in a timely manner, and provide effective guidance and measures for formulating repair and reinforcement plans for earthquake-damaged structures and preventing them from being attacked by earthquakes again. [0003] In the assessment of earthquake damage, the damage degree of reinforced concrete members can be judged according to the crack width, length, number and distribution characteristics of cracks, and the crack width is ...

AI Technical Summary

Problems solved by technology

Although the current image recognition method has made significant progress with the support of artificial intelligence technology, it still needs to use a large number of real and detailed graphics for training, and the identification of tiny cracks is not accurate

More importantly, the detection instrument measurement and image recognition methods rely too much on the crack shape and distribution characteristics in training and practical application, and lack solid mechanical theory as support, and the evaluation accuracy needs to be improved

However, the traditional crack width calculation method needs to take the load as a known condition, and the load information of structures and components during the earthquake is time-varying and difficult to obtain accurately

Therefore, it is difficult to calculate the crack width of the actual earthquake-damaged component based on the load data and use it to evaluate the damage degree of the component

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