摘要
目前附加粘滞阻尼器的消能减震结构基于性能的抗震设计方法一方面为了确保实现性能目标需要进行复杂的迭代计算,另一方面没有具体给出阻尼器相应支撑刚度的计算方法。为此,本文在直接基于位移的抗震设计方法基础上,根据附加粘滞阻尼器所提供的阻尼力、层间剪力与附加等效粘滞阻尼比之间的关系以及利用支撑-阻尼器串联结构体系可以视为截断频率与支撑刚度和阻尼器阻尼系数相关的一阶滤波器这一思路,提出了一种针对附加粘滞阻尼器结构直接基于位移进行抗震设计的设计方法,并且进一步通过非线性时程分析计算验证了该设计方法的可行性。
The performance-based seismic design method for the energy-dissipated structures with additional viscous dampers, on one hand, need a number of iterations to ensure the performance goal to be satisfied;one the other hand, these methods do not provide the guideline for determining the stiffness of the braces supporting the additional viscous dampers. Therefore, in this study, base on the direct displacement-based seismic design method for the energy-dissipated structures with additional viscous dampers is proposed based on the following facts: the additional equivalent viscous damping ratio is dependent upon the damping force provided by the viscous damper and interlayer shear;the brace-damper assembly can be regarded as the first-order filter with a cut-off frequency related to the damping coefficient of the viscous damper and stiffness of the brace. Through the numerical experiment of nonlinear time history analysis, the reliability of this method is verified.
作者
周函宇
叶昆
江厚山
ZHOU Hanyu;YE Kun;JIANG Houshan(Zhuzhou Times New Material Technology Co Ltd,Zhuzhou 412000,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Wuhan Huazhong Keda Testing Technology Co Ltd,Wuhan 430074,China)
出处
《土木工程与管理学报》
2023年第1期48-53,共6页
Journal of Civil Engineering and Management
基金
国家科技支撑计划(2012BAJBB02)。
关键词
粘滞阻尼器
直接基于位移
抗震设计
支撑刚度
一阶滤波
viscous damper
direct displacement-based
seismic design
brace stiffness
first-order filter
