基于能量的摩擦摆隔震结构隔震层最大变形计算方法研究  

Study on the calculation method of the maximum deformation of the isolation layer of friction pendulum isolated structures based on energy analysis

作　　者：何厚谊 李吉超[1,2] 王涛 HE Houyi;LI Jichao;WANG Tao(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Admininstration,Harbin 150080,China;Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,Harbin 150080,China)

机构地区：[1]中国地震局工程力学研究所地震工程与工程振动部门重点实验室,黑龙江哈尔滨150080 [2]地震灾害防治应急管理部重点实验室,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》2024年第6期84-92,共9页Earthquake Engineering and Engineering Dynamics

基　　金：中国地震局工程力学研究所基本科研业务费专项资助项目(2021EEEVL0310,2020C03)。

摘　　要：隔震技术是保证结构安全的有效手段。以摩擦摆隔震结构为例,提出了一种基于最大瞬时输入能量分析的隔震层最大变形计算方法。首先基于非线性单自由度模型验证了隔震层最大变形与最大瞬时输入能发生时刻的一致性,其次推导了隔震层的最大滑动位移与最大瞬时输入能段滞回耗能的关系,进一步确定了隔震层最大变形与最大滑动位移的比例,最终提出了基于最大瞬时输入能计算隔震结构隔震层最大变形的方法,通过案例分析验证了该方法的可行性。研究结果表明:隔震层的最大变形与最大瞬时输入能具有较高的相关性;隔震层在最大瞬时输入能段的滞回耗能与最大瞬时输入能的比值随着结构等效周期变大呈减小趋势;最大变形与最大滑动位移的比值可取0.55;基于能量法计算的隔震层最大变形与结构实际最大变形的误差在10%以内。Seismic isolation technology is an effective means to protect the safety of structures.Taking the friction pendulum isolation structure as an example,a method for calculating the maximum deformation of the isolation layer(MDIL)based on the maximum momentary input energy(MMIE)analysis is proposed.Firstly,the MDIL is verified to be occur simultaneously with the MMIE based on a nonlinear single degree of freedom(NSDOF)model.Secondly,the relationship between the maximum sliding displacement and the hysteretic energy consumption of the isolation layer is derived.The ratio of the MDIL to the maximum sliding displacement of the isolation layer is further determined.Finally,a method for calculating the MDIL based on the MMIE is proposed and verified using the NSDOF model.The results show that there is a high correlation between the MDIL and the MMIE.The ratio of the hysteretic energy of the isolation layer to the MMIE decreases with the increase of the equivalent period of the structure.The ratio of the MDIL to the maximum sliding displacement is about 0.55.Compared to the actual maximum deformation of the isolated structure,the calculated deformation using the energy method is with an error of 10%.

关 键 词：隔震结构 摩擦摆支座 能量分析 最大位移 简化计算方法 

分 类 号：TU311[建筑科学—结构工程] P315.9[天文地球—地震学]