摘要
在对建筑结构进行地震损伤评估时,使用不同的构件损伤模型和结构损伤指数加权方法计算得到的结构整体损伤指数各不相同。为便于学者们快速合理地选择模型和方法来准确评估RC框架结构地震损伤程度,本文使用OpenSees对9个RC框架结构进行增量动力分析(IDA),对比了6个构件损伤模型和3种结构损伤指数加权方法的差异性,改进了杜修力加权方法,并分析了结构层数和设防烈度对结构抗震性能的影响。结果表明:(1)Chung加权方法、欧进萍加权方法和本文的改进杜修力加权方法适用于层损伤指数由低楼层向高楼层递减的RC框架结构,杜修力加权方法会放大此类结构地震损伤程度;(2)基于变形或能量的单参数模型对结构地震损伤评估不准确,基于变形和能量的双参数模型能较准确地反映位移首次超越破坏和能量累积损伤破坏的统一性,Park-Ang模型和牛荻涛模型对结构地震损伤的评估较为合理;(3)轴压比不变时,结构层数增加会降低结构抗震性能,在各自设防烈度对应的小震、中震和大震下,其相对抗震能力从高到低依次为7度、9度和8度设防结构。
In the seismic damage assessment of building structures,overall structure damage indexes calculated by different member damage models and structural damage index weighting methods are different from each other.In order to make scholars quickly and reasonably choose a model and a method to accurately assess the seismic damage of RC frame structures,the article uses OpenSees for incremental dynamic analysis of nine RC frame structures,differences between six member damage models and differences between three structural damage index weighted methods are compared,the Du Xiuli weighted method is modified,and the influence of the number of storeys and fortification intensity on the structural seismic performance is analyzed.The results indicate that the Chung weighted method,the Ou Jinping weighted method and the modified Du Xiuli weighted method in this paper make available for RC frame structures with the storey damage index decreasing from low storey to high storey,and the seismic damage of such structures can be enlarged by using the Du Xiuli weighted method.The single parameter model based on deformation or energy is not accurate to evaluate the structural seismic damage.The two-parameter model based on deformation and energy can more accurately reflect the unity of the first-time displacement exceeding damage and energy accumulating damage.The Park-Ang model and the Niu Ditao model are reasonable to evaluate the structural seismic damage.When the axial compression ratio is unchanged,the increase of the number of storeys can reduce the structural seismic performance.Under small,medium and large earthquakes corresponding to their respective fortification intensity,the relative structure seismic performance is intensity 7,intensity 9 and intensity 8 from high to low.
作者
杨游
杨永强
赵一男
公茂盛
YANG You;YANG Yongqiang;ZHAO Yinan;GONG Maosheng(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,CEA,Harbinl 50080,China;Central and Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Wuhan 430010,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2020年第5期118-126,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家重点研发计划项目(2017YFC1500602)
国家科技重点研发计划课题省级项目(GX18C005)
国家自然科学基金项目(51678541)。
关键词
RC框架结构
损伤模型
加权方法
层数
设防烈度
RC frame structure
damage model
weighted method
number of storeys
fortification intensity
作者简介
杨游(1994-),男,硕士研究生,主要从事结构抗震研究.E-mail:18800411985@163.com;通讯作者:杨永强(1983-),男,副研究员,博士,主要从事结构抗震研究.E-mail:yangiem@foxmail.com。
