【摘要】 FRP约束混凝土和钢管混凝土是两种不同的约束混凝土的应用形式。分析表明,约束混凝土可以显著提高其承载力和延性。通过比较FRP约束混凝土和钢管混凝土性能的差异,指出约束混凝土的性能主要与约束效应系数、非约束混凝土的强度以及约束材料的性能有关,并且给出了约束混凝土的统一强度模型和FRP约束混凝土的应力-应变模型,模型的计算结果与试验数据吻合较好。更多还原

【Abstract】 FRP-confined concrete and concrete filled steel tube are two specific application ways of confined concrete.Analysis shows that the confined concrete can obviously improved bearing capacity and ductility.By comparison the different behavior between FRP-confined concrete and concrete filled steel tube,it can be concluded that the behavior of confined concrete is mainly related to the modified confinement ratio,unconfined concrete strength and properties of confining material.The unified strength model of confined concrete and stress-strain model of FRP-confined concrete is also given.The predictions of models agree well with test data.更多还原