| FRP-confined concrete columns have beed researched for a long time. Many scholars have studied the behavior of FRP-confined concrete columns when columns loaded axes loads. But their formula were complex and different each other. This paper collects many domestic and international fiber reinforced polymer (FRP) material research results of concrete and makes systematic analyses of the research results. At the same time the paper collects a large number of test data. Through comparing and analyzing the models which are collected in this paper, K.Miyauchi model is suggested as the foundation of improving model. Utilizing FEM software, the paper analyses the confined concrete component which receiving the analysis of performance of strength to a slice of material of FRP. Through considering different models, FRP material type, paste such influence factors as one layer of counting and amount of hoop matched and size of component ,etc. the paper carry on model, summarize result of different models to analyse and bring forward the parameter of λ ξ and Ï .Through a large amount of analysis, the paper improve the Miyauchimodel and draw the recommended model-Improved Miyauchi model andexamining it with test data which are collected in this paper. The recommended model has considered more impacted factor, it can be used in more wide circses and its calculated precision more high than others.According to FRP slices of material model-the improved Miyauchi model,the paper has deduced formula which is use in calculating curve M - f. Utilizing VB soft ware ,the paper work out a program and work out the procedure to calculate M, f by this program. Then we can calculate the M, f by inputing different parameters and draw a chart of curve M - f. At last, the paper discuss the ductility of confined concrete component. It can summarize that among the factors which impact the FRP-confined concrete columns' ductility , the rate of FRP or p is an important factor. |
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