框架剪力墙结构的滤波减振特性  

Vibration Attenuation in Frame-Shear Wall Structures based on the Filtering Effect

作　　者：张孝荣 冯斓梦 程志宝[2] ZHANG Xiaorong;FENG Lanmeng;CHENG Zhibao(Construction and management Division,Renmin University of China,Beijing,China,100872;School of Civil Engineering,Beijing Jiaotong University,Beijing,China,100044)

机构地区：[1]中国人民大学校园建设管理处,北京100872 [2]北京交通大学土木与建筑工程学院,北京100044

出　　处：《沈阳建筑大学学报（自然科学版）》2018年第4期596-604,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51508023;51678046);北京市自然科学基金项目(8182045);教育部中央高校基本科研项目(2016JBM035)

摘　　要：目的将固体物理学中周期结构理论拓展应用到土木工程中,计算框剪结构的频散动力特性,进一步研究框剪结构的滤波减振特性.方法首先应用COMSOL M ULTIPHYSICS建立了框剪结构标准层楼结构模型并施加周期性边界条件,求解计算框剪结构频散关系;其次参数分析讨论了框剪结构典型参数对第一衰减域的影响;最后应用ANSYS对框剪结构模型进行模态分析、频率响应分析和时程分析,验证其滤波特性.结果框剪结构频散曲线具有带特性.当外部激励处于滤波衰减域范围内时,振动随着传播不断衰减,结构响应较小;相反当外部激励处于滤波衰减域范围之外时,振动随着传播没有衰减,结构响应较大.结论应用周期结构理论,可有效分析框剪结构的滤波减振特性,利用该特性有望在设计阶段对框剪结构进行优化布置,从而减小框剪结构内部设施在外部激励下的动力响应.Introducing the periodic structure theory into civil engineering,the dispersion property of the frame-shear wall structure is investigated theoretically in this paper. First,three dimensional standard floor model of a frame-shear wall structure is built using the finite element software COMSOL MULTIPHYSICS. Applying the Bloch-Floquet boundary conditions,dispersion curves of the infinite periodic frame-shear wall structure are calculated. Parametric analysis is conducted to investigate the influences of the geometrical and physical parameters on the first attenuation zone of the frame-shear wall structure. Further,dynamic properties of finite periodic frame-shear wall structures are simulated by using the finite element software ANSYS. Modal analysis,harmonic analysis and time history analysis of the considered frame-shear wall structures are conducted. It isfound that frame-shear wall structures have a special filtering effect. In the attenuation zones,waves/vibrations will be forbidden and dynamic responses of the upper structure is very small,while out of the attenuation zones,waves/vibrations cannot be propagated and dynamic responses of the upper structure are very large. Based on this special property,frame-shear wall structures could be optimized to attenuate external harmful vibrations.

关 键 词：周期结构 框剪结构 频散特性 衰减域 减振 

分 类 号：TU375.4[建筑科学—结构工程] O342[理学—固体力学]