摘要
大跨空间结构的阻尼器最优布置位置确定过程复杂。文中提出了一种从能量角度出发,以应变能增量占比系数(increment coefficient of strain energy,ICSE)为评价指标的方法,从而确定阻尼器替换杆件位置。基于提出的适用于单层网格形式大跨空间结构的多维减振阻尼器,以某肋环斜杆型大跨单层网壳为例,对比分析了强震激励作用下所提出的布置方法与其他布置方法的减振效果,验证了所提出的布置方法的合理性以及在单层球面网壳中的适用性。结果表明:采用本方法,能够将结构所有节点竖向加速度峰值均方根降低15.80%~39.11%,将顶点竖向加速度幅值降低27.74%~54.95%。所提出的布置方法可以避免场地特征等因素的干扰,有效降低单层球面网壳结构的竖向振动响应。
The damper layout is difficult to be determined or optimized for the large-span spatial structures.In this paper,a novel method based on the increment coefficient of strain energy(ICSE)is proposed to determine the damper layout.To verify the effectiveness of the method,a comparison of the effective vibration reduction has been performed between the proposed method and the other methods.The vibration reduction effect of the single-layer latticed shell with a rib-ring oblique rod type is compared and analyzed under different earthquake excitations.Meanwhile,the damper used in this comparison is based on a kind of multi-dimensional vibration control damper proposed by the author.The results show that by using the proposed method,the mean square root of vertical acceleration peak of all joints is decreased by 15.80%~39.11%,in addition,the vertical acceleration amplitude of the vertex is decreased by 27.74%~54.95%when replacing radial rods from the 6th ring with multi-dimensional vibration control dampers.Furthermore,the correctness of the proposed method and its applicability for single-layer latticed shells are also investigated and verified.The position of rods replaced by dampers for the single-layer latticed shell can be accurately judged through the ICSE.White noise excitation covers the possible influence of earthquakes on the structure and can avoid interference caused by site characteristics or other factors.This method is a wider applicable damper layout method.
作者
韩庆华
郭凡夫
刘铭劼
芦燕
HAN Qinghua;GUO Fanfu;LIU Mingjie;LU Yan(Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration(Tianjin University),Tianjin 300350,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2023年第2期69-80,共12页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(U1939208,52022067)。
关键词
单层网壳结构
振动控制
阻尼器布置
应变能
single-layer latticed shell
vibration control
damper layout
strain energy
