设置悬臂肘节型黏滞阻尼器高层结构的减震效果分析  

Analysis of Seismic Mitigation Effect on High-rise Building with Cantilever-toggle-brace Viscous Dampers

作　　者：周云[1] 林绍明[1] 邓雪松[1] 吴从晓[1] 张超[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《工程抗震与加固改造》2014年第2期8-14,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：广东省自然科学基金团队项目(8351009101000001);广州市高校"羊城学者"首席科学家项目(10A026S);广东省教育部产学研项目(20090912);广州市教育系统创新学术团队项目(穗教科[2009]11号)

摘　　要：针对结构层间位移小、黏滞阻尼器减震效果难以发挥的问题,提出悬臂肘节型黏滞阻尼器消能系统,介绍了该消能系统的构造、原理与特点,对黏滞阻尼器分别采用悬臂肘节型、肘节型和消能伸臂型连接的高层结构的减震效果进行对比分析.结果表明：悬臂肘节型黏滞阻尼器消能系统能充分利用高层结构的弯曲变形和层间剪切变形增大阻尼器的输出位移,阻尼器的名义位移放大系数可达3～5倍;悬臂肘节型黏滞阻尼器消能系统对结构水平位移、层间位移角和层间剪力均具有很好的减震效果,设置在结构的中部或中下部楼层时阻尼器位移放大效果最好.The effect of viscous dampers could not be utilized effectively due to small story drift of structure,a cantilever-toggle-brace viscous damper energy dissipation system is proposed for solving this problem,and its configuration,principle,advantage are illustrated.Comparative study on seismic mitigation effect for high-rise building with cantilever-toggle-brace viscous dampers,toggle brace viscous dampers and damped outrigger viscous dampers is conducted,respectively.The results indicate that cantilever-togglebrace viscous damper energy dissipation system could magnify the output displacement of vicious damper with the consideration of both structural bending deformation and story shear deformation,and values of nominal displacement magnification factor are in the range of 3.0-5.0.Cantilever-toggle-brace viscous damper energy dissipation system is capable of magnifying viscous dampers＇ output displacement,which are benefit for reducing structural horizontal displacement,story drifts and shears.Furthermore,dampers could achieve better displacement magnification effect by fixing cantilever-toggle-brace viscous damper energy dissipation system on the middle or lower floors of structure.

关 键 词：高层结构 黏滞阻尼器 悬臂肘节型 耗能减震层 减震效果 

分 类 号：TU973.31[建筑科学—结构工程]