【摘要】 建立了间隔包裹FRP布约束长龄期混凝土短柱在轴向荷载作用下的徐变模型,模型建立的基础是多轴应力状态下混凝土柱的徐变理论及基于流动率法的B3模型,考虑了紧箍力和FRP本身的徐变作用对FRP约束混凝土徐变的影响。在此基础上,计算出了时间—应变的关系曲线,并提供了算例。更多还原

【Abstract】 Using the creep theory of concrete under multi-axial stresses and B3 creep model for concrete under uniaxial stress,a creep model is constructed to study the time-dependent behavior of fiber straps-wrapped long-term concrete columns under sustained axial load.Accordingly,an algorithm,in which the circumferential force and creep of FRP itself were taken into consideration,is developed for the creep analysis of fiber straps-wrapped long-term concrete columns.Based on the new model,an example is presented.更多还原