基于变形和能量的双参数损伤模型

摘要

为了弥补既有 Park-Ang 双参数损伤模型计算工作量大，不便于实际应用，且易产生较大累积误差等方面不足，针对 RC 框架结构，基于构件位移损伤和耗能损伤关系，提出了一种基于层的半解析半数值双参数损伤模型，并通过与 Park-Ang 模型计算得到的层间损伤模式对比，验证了所提出模型的有效性。同时，得出以下结论：构件损伤由位移损伤和耗能损伤两部分组成，其中位移损伤起主要作用，且针对各层梁或柱，二者之间有较好的线性关系；RC 框架梁、柱层间损伤模式与结构累积塑性变形能分配系数沿楼层的分布趋势相同。%Existing two-parameter damage models are difficult for application due to a large amount of calculations and more cumulative errors.Here,a semi-analytical and semi-numerical two-parameter model for RC frams was proposed based on displacement damage and energy one.Then the inter-story damage modes calculated with the proposed model were compared with those obtained with Park-Ang model,and the feasibility of the proposed model was verified.The results showed that component damage is composed of displacement damage which plays a major role and energy one;a good linear relationship exists between the two types of damage for RC beams or columns in each layer;the distribution trend of the inter-story damage between a RC frame's beams and columns is the same as that of its cumulative-plastic deformation energy distribution coefficient along layers.