【摘要】 针对存在性能退化的既有结构,提出了同时考虑单元刚度变化和单元材料阻尼比变化的损伤建模方式。以三层钢筋混凝土框架结构为例,进行有限元建模分析。计算不同构件发生破坏时该结构的基频变化率。计算结果表明:各构件的损伤对结构的影响是不同的;同时考虑构件刚度和构件阻尼比变化能够更真实的反应既有结构的动力特性。提出的同时考虑刚度和阻尼变化的建模方法可为进行既有结构的计算机仿真分析及研究既有结构的抗震性能提供依据。更多还原

【Abstract】 The damage modeling method for existing structures considering the changes in element stiffness and element material damping ratio simultaneously is developed.Then the fundamental frequency change rates of 3-storey reinforced concrete frame with different damage situation are calculated.The results show that the fundamental frequency change rate can reflect the damage degree of members and structures.The modeling method which considers the changes in element stiffness and element material damping ratio simultaneously provides basis for simulation analysis of the existing structures.更多还原