摘要
剪切型金属阻尼器在新建工程及结构抗震加固工程中已得到了较广泛的应用,其恢复力模型是进行整体结构非线性地震反应分析的基础。为了更准确地描述剪切型金属阻尼器的剪力-变形滞回关系,提出了一种考虑性能退化的新型恢复力模型。通过独立参数控制恢复力模型,以考虑剪切型金属阻尼器在大变形下的强度退化、刚度退化、耗能能力退化等特征。根据所提模型,采用C++语言开发了能够用于剪切型金属阻尼器抗震分析的计算程序,并将其嵌入到结构通用分析软件OpenSees中。使用该模型对现有钢连梁和钢板剪力墙两类剪切型金属阻尼器进行了模拟。结果表明:该文建立的恢复力模型能较准确地模拟试验结果,能够反映剪切型金属阻尼器包括大变形阶段在内的整个变形阶段的滞回性能。该模型可用于安装了剪切型金属阻尼器的整体结构非线性地震反应分析。
Shear-type metal dampers have been widely used in new construction and seismic strengthening of structures.Their hysteretic models are the basis for nonlinear seismic response analysis of overall structures.To describe the shear force-deformation relationships of shear-type metal dampers more accurately,a new hysteretic model considering performance degradation is proposed.The new model is controlled by independent parameters to consider the degradation of strength,stiffness,and energy dissipation capacity under large deformations.Based on the model proposed,a computer program for seismic analysis of shear-type metal dampers is developed by C++ language and embedded in OpenSees software.The model is used to simulate the experimental hysteresis curves of two types of shear-type metal dampers:steel coupling beams and steel shear walls.The results show that:the model proposed can simulate the experimental results accurately and the hysteretic performance of the shear-type metal dampers in the whole deformation range including large deformations,and can be used for nonlinear seismic analysis of structures installed with shear-type metal dampers.
作者
卜海峰
蒋欢军
和留生
BU Hai-feng;JIANG Huan-jun;HE Liu-sheng(State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《工程力学》
EI
CSCD
北大核心
2022年第10期131-139,共9页
Engineering Mechanics
基金
国家重点研发课题项目(2017YFC1500701)。
关键词
金属阻尼器
恢复力模型
数值分析
剪切屈服
性能退化
metal damper
hysteretic model
numerical analysis
shear yielding
performance degradation
