关键词: FRP, 混凝土, 受压构件, 变形, 尖点突变模型

Abstract: The deformation behavior of FRP (fiber reinforce plastic)-restrained concrete column are discussed, as well as the influencing parameters on it. Taking advantage of the feature of catastrophe theory, the relation between axial load ratio and total creep deformation is analyzed for the FRP-restrained concrete column under the action of long-term load. A CCM (cusp catastrophe model) on creep deformation (S), axial load ratio (N) and column performance (R) is then developed, where the existing test data are used to determine the parameters α, β, γ and the axial load ratio k as a coefficient. The calculated results of F value are so close to its theoretical results, it means that there is a goodness of fit between the theoretical and actual results of S-R-N relation by the cusp catastrophe model, thus verifying the high accuracy of the model.