单自由度Maxwell阻尼器耗能结构基于频响函数谱矩的等效阻尼  

Equivalent dampingof SDOF structure with Maxwell damper based onspectral moments of frequency response function

作　　者：李创第[1,2] 张翊[1] 葛新广[2] LI Chuang-di;ZHANG Yi;GE Xin-guang(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Department of Civil Engineering and Architecture,Guangxi University of Science and Technology,Liuzhou 545006,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西科技大学土木建筑工程学院,广西柳州545006

出　　处：《广西大学学报（自然科学版）》2019年第1期41-51,共11页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51468005);广西科技大学创新团队支持计划项目

摘　　要：为建立单自由度Maxwell阻尼器和支撑—粘滞阻尼器复合系统减震结构基于反应谱的抗震设计方法,提出了一种此类结构等效阻尼的新型分析方法。鉴于Maxwell阻尼器和支撑—粘滞阻尼器系统的松弛时间均为小量的特性,首先,对结构系统的运动方程进行重构以提高分析精度;其次获得重构系统及其等效系统的频响函数,利用两种体系的频响函数的零阶和二阶谱矩相同的等效准则,获得了单自由度Maxwell阻尼器和支撑—粘滞阻尼器系统耗能结构等效阻尼及等效频率的解析表达式。数值分析表明:在抗震规范规定的参数范围内,本文所提方法的精度明显优于经典的模态应变能方法。In order to apply response spectrum method to design energy dissipation SDOF structure with Maxwell damper,a novel calculating method of equivalent damping of the above structure is presented.Based on the fact that therelaxation time of Maxwell damper is small,the equation of motion of SDOF structure with Maxwell damper is restructured to achieve better analysis accuracy.Using equivalent criterion that zero order and second order spectrum moments of frequency response function for restructure and equivalent structure are equal,analytical expressions of equivalent damping and frequency for the aforementioned structures are obtained.Finally,it is showed by numerical analysis that the accuracy of the presented method is superior to the classical modal strain energy method in the parametric range of the requirements of China code for seismic design of building.

关 键 词：MAXWELL阻尼器 频响函数 谱矩 抗震设计 反应谱法 等效阻尼 

分 类 号：TU311.3[建筑科学—结构工程]