Deformation-based earthquake accumulated damage evaluation method for RC frame structure

Abstract

The invention relates to a deformation-based earthquake accumulated damage evaluation method for an RC frame structure and belongs to the field of engineering structure earthquake damage evaluation. The method includes the following steps that firstly, a deformation-based earthquake accumulated damage index calculation formula of RC beam and column components is established, the primary displacement angle amplitude and the secondary displacement angle amplitude of the beam and column components are extracted from deformation data or experimental data of the RC beam and column components under the earthquake action, and the ultimate displacement angle is calculated during monotonic loading of the components; secondly, earthquake accumulated damage index calculation formulas of all layers of the RC frame structure are established, and earthquake accumulated damage indexes of all the layers of the RC frame structure are calculated; thirdly, an integral earthquake accumulated damage index calculation formula of the RC frame structure is established, and the integral earthquake accumulated damage index of the RC frame structure is calculated; fourthly, local damage evaluation and integral damage evaluation are conducted on the RC frame structure. The method has the advantages of being simple, practical, fast, accurate and the like; the integral damage index of the structure can be obtained, and the local damage indexes of any beam and column component in the structure can be obtained.

Description

technical field [0001] The invention relates to a deformation-based seismic cumulative damage assessment method of an RC frame structure, which belongs to the field of seismic damage assessment of engineering structures. Background technique [0002] Whether the structure can be repaired after the earthquake occurs, it is necessary to know the degree of earthquake damage of the structure, which is especially important for post-earthquake disaster relief and post-disaster assessment. In my country, due to the implementation of new codes for seismic design of buildings, many high-rise buildings will be equipped with seismic observation systems or seismic experiments, and it is easy to obtain deformation data of structures under earthquakes. Therefore, it is urgent to provide technologies and methods to process these data. In this way, an earthquake damage assessment model is established, and then the damage degree of the structure is evaluated, and technical support is provided...

AI Technical Summary

Problems solved by technology

However, most of the damage assessment models proposed in the past with deformation as a parameter only considered the influence of the maximum deformation on the damage variable, and did not consider the influence of cyclic deformation on the damage variable. The model is too simple and the uncertainty of the damage variable is large.

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