【摘要】 基于刚度下降提出了一种混凝土损伤指标,可直接表示为应变的函数。建立了弯矩与梁的变形、挠度、损伤等之间关系的一般公式,用数值计算方法给出了它们之间的关系曲线。对简支梁在常见荷载形式下进行全过程损伤分析,比较了普通RC梁和预应力RC梁的损伤情况,说明了本方法的可行性及其与实际现象的一致性,为设计、施工和维修加固提供有效依据。更多还原

【Abstract】 A damage index of concrete based on the stiffness decline is established,which can be directly expressed with strain.The general equations relating the bending moment with deformation,curvature and damage are set up.The corresponding curves are given by numerical method.This method is found feasible and close to reality by analyzing the whole damage process of simply supported beams under common loads.Comparison between the damage of ordinary RC beams and prestressed RC beams is conducted.Effective bases are provided for design,construction,repairing and strengthening.更多还原