基于层间位移利用率法修正消能减震结构的附加阻尼

发布时间：2018-11-11 16:09

【摘要】：详细分析了悬臂墙式黏滞阻尼器层间位移利用率(阻尼器位移与楼层位移之比)中阻尼器位移的三个组成部分,即楼层位移、梁柱节点转动、悬臂墙自身变形所引起的阻尼器位移。推导了层间位移利用率与阻尼器布置位置和消能子结构梁柱刚度比两个参数之间的关系,并采用与这两个参数相关的修正函数来考虑仿真模拟中较为繁琐的阻尼器动刚度问题,得到实用的层间位移利用率计算公式。研究结果表明:层间位移利用率在阻尼器靠边布置时小于1,居中布置时大于1,且布置越接近梁跨中层间位移利用率越大;随着消能子结构梁柱刚度比的增大,层间位移利用率在阻尼器靠边布置时增加,居中布置时减小,即都更接近于1;层间位移利用率越大,达到同样期望附加阻尼比所需的附加阻尼越小,体现出更好的经济性。最后,通过工程实例充分地验证了该减震设计方法的正确性与实用性。
[Abstract]:In this paper, the three components of the displacement of the cantilever wall viscous damper (the ratio of the damper displacement to the floor displacement) are analyzed in detail, that is, the floor displacement, the rotation of Liang Zhu node. The displacement of the damper caused by the deformation of the cantilever wall itself. The relationship between the interstory displacement utilization ratio and the location of the damper and the ratio of Liang Zhu stiffness to the energy dissipation substructure is derived, and the modified function related to these two parameters is used to consider the more complicated dynamic stiffness problem of the damper in the simulation. A practical formula for calculating the utilization ratio of interstory displacement is obtained. The results show that the utilization ratio of interstory displacement is less than 1 when the damper is pulled aside and more than 1 when placed in the center. The closer the arrangement is to the greater the utilization ratio of the displacement between the span and the middle layer of the beam; With the increase of the ratio of Liang Zhu stiffness of the energy dissipation substructure, the utilization ratio of interstory displacement increases when the damper is pulled aside, and decreases when the damper is placed in the center, that is, it is more close to 1; The greater the utilization ratio of interstory displacement, the smaller the additional damping required to achieve the same desired additional damping ratio, which reflects better economy. Finally, the correctness and practicability of the design method are fully verified by an engineering example.
【作者单位】：昆明理工大学建筑工程学院;
【基金】：国家自然科学基金项目资助(51168024)
【分类号】：TU352.1

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