放大型黏滞阻尼伸臂减震性能分析  

Parameter Analysis on Damping Effect of a Novel Viscously-Damped Outrigger

作　　者：薛皓[1] 刘锦洋 罗峥[1] 薛建阳[1] 葛鸿鹏[2] XUE Hao;LIU Jinyang;LUO Zheng;XUE Jianyang;GE Hongpeng(College of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;China Northwest Architecture Design and Research Institute Co.,Ltd.,Xi’an 710018,China)

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]中国建筑西北设计研究院有限公司,西安710018

出　　处：《工业建筑》2022年第11期189-193,共5页Industrial Construction

基　　金：陕西省科技创新团队项目(2019TD-029);陕西省重点研发计划项目(2020SF-392);榆林市产学研科技计划项目(CXY-2020-062)。

摘　　要：以某超高层建筑为工程背景,对原有的黏滞阻尼伸臂方案进行改进,在伸臂桁架端部加入T型杠杆机构以增加地震中阻尼器的变形,构成了放大型黏滞阻尼伸臂方案。对分别采用这两种减震方案的超高层结构的减震效果进行了对比分析,并对影响减震效果的主要设计参数(阻尼器参数和杠杆率)进行了研究。结果表明:放大型黏滞阻尼伸臂方案能有效放大原方案中阻尼器两端的相对速度和变形,放大倍数近似等于T型杠杆机构的杠杆率;随着杠杆率的增大,放大型黏滞阻尼伸臂方案中阻尼系数的最优值逐渐减小,放大型黏滞阻尼伸臂方案中最优阻尼系数与杠杆率的乘积近似等于原黏滞阻尼伸臂的最优阻尼系数。Taking a practical super high-rise building as a case study, the improved viscous damping outrigger scheme which contains a lever mechanism installed at the end of the truss was proposed to amplify the deformation of the dampers in conventional viscous damping outrigger in earthquakes. The comparative analysis of damping effect of the two different damping schemes was carried out, and the main parameters(damper parameters and leverage ratio) affecting the energy dissipation efficiency of the newly-proposed viscous damping outrigger scheme were studied. The results indicated that the newly-proposed viscous damping outrigger scheme could amplify the deformation and velocity of dampers effectively, and the amplification factor was approximately equal to the leverage ratio of the T-shaped rigid arm;as the lever ratio increased, the optimal damping coefficient of the newly-proposed viscously damped outrigger decreased gradually. The product of the optimal damping coefficient and the leverage ratio in the newly-proposed viscous damping outrigger was approximately equal to the optimal damping coefficient of the conventional viscously damped outrigger.

关 键 词：超高层建筑 框架-核心筒 黏滞阻尼器 黏滞阻尼伸臂 杠杆率 

分 类 号：TU973.31[建筑科学—结构工程]