Abstract
To analysis the earthquake damage evolution law, seven composite steel concrete (CSC) columns were manufactured. The experiment consisted of pre-damage loading, reinforcement with enveloped steel jackets (ESJ)/CFRPs and pseudo-static tests. The results showed that the severely damaged specimens strengthened with CFRPs or ESJ have the ability to resist earthquake again. The experimental results were in good agreement with the analytical results. Based on the modification and extension of Reihorn evaluation criterion, the earthquake damage evaluation criterion of seismic-damaged CSC columns with strengthening was obtained, which describes the specimen from "basically intact" to "complete destroyed". Then, the seismic damage evolution law of specimen was obtained by quantitative analysis of the test results.
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