摘要
齿轮齿条式电涡流阻尼墙(eddy current damping-rack and gear wall,ECD-RGW)是一种具有明显非线性特征的消能减震装置,为探究其对钢筋混凝土(reinforced concrete,RC)框架结构抗震性能的影响。基于OpenSees软件,建立了一栋5层RC框架结构的有限元模型,并实现了电涡流阻尼墙非线性力学模型的二次开发,并验证了其准确无误,进而对该模型进行非线性时程分析,使用数值方法评估了ECD-RGW减震结构的概率抗震性能。选取ATC-63项目中推荐的22条典型远场地震波,以最大层间位移角作为结构损伤指标,采用增量动力分析方法分别对安装和未安装ECD-RGW的RC框架结构进行了地震易损性分析。研究结果表明:相较于无控结构,安装了ECD-RGW的RC框架结构达到各级破坏状态的超越概率明显降低;ECD-RGW在各级地震作用下均具有优良的减震效果;且提高ECD-RGW的传动比可以进一步提高RC框架结构的抗震性能,降低结构损伤概率。
Eddy current damping-rack and gear wall(ECD-RGW)is a kind of energy dissipation damping device with obvious nonlinear characteristics.To evaluate its influence on the seismic performance of the reinforced concrete(RC)frame structure,the finite element model of a five-story RC frame structure is established based on the OpenSees platform.The secondary development of the mechanical characteristics of the ECD-RGW is realized in OpenSees,and this secondary development is verified to be precise.Then the nonlinear time history analysis of ECD-RGW damped frame structure is carried out.The probabilistic seismic performance of ECD-RGW damped structure is evaluated by numerical method.22 far field ground motion records recommended from ATC-63 are selected,and the story drift ratio is selected as structural damage index.Incremental Dynamic Analysis(IDA)is utilized to analyze the seismic fragility of ECD-RGW damped structure and uncontrolled RC structure separately.The results manifested that comparing with the uncontrolled structure,the probabilities of structure with ECD-RGW are significantly diminished in different failure states.ECD-RGW has excellent energy-dissipative capacity even under the various intensity earthquakes.Increasing the transmission ratio of ECD-RGW can further improve the seismic performance of the structure,which can significantly reduce the damage probability.
作者
霍朝煜
李寿英
陈政清
HUO Zhaoyu;LI Shouying;CHEN Zhengqing(Key Laboratory for Wind and Bridge Engineering of Hunan Province,Hunan University,Changsha 410082,China;College of Civil Engineering,Hunan University,Changsha 410082,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2023年第6期47-56,共10页
Earthquake Engineering and Engineering Dynamics
基金
国家重点研发计划(2017YFC0703604)。
关键词
电涡流阻尼器
框架结构
易损性分析
地震响应
eddy current damper
frame structure
fragility analysis
seismic response
