摘要
借鉴TMD、DTMD、TPD各自的优缺点,本文设计制作了一种双调谐颗粒阻尼器(Double Tuned Particle Damper, DTPD),为明确不同场地地震作用下DTPD的减震控制效果,以某高耸电视塔结构为原型,按照1:20缩尺比例制作了其缩尺模型。针对缩尺模型结构的基本动力特性参数,选取了具有不同场地类别的地震动作为输入。开展了设计地震动作用下DTPD控制前后的缩尺模型振动台试验研究。结果表明:所设计的DTPD能够显著的降低缩尺模型在地震荷载作用下的绝对位移响应和绝对加速度响应,中震作用下DTPD的减震控制效果明显优于小震作用下DTPD的减震效果;小震和中震条件下,四类场地地震动作用下试验模型顶部加速度峰值减震率、绝对位移减震率及加速度均方根减震率分别是一类场地地震动作用下相应参数减震率的1.94~1.94倍、1.79~1.92倍、1.45~1.61倍,随着场地条件的恶化,缩尺模型塔的动力响应增大,DTPD的减震控制效果总体呈增加趋势。
In view of the advantages and disadvantages of TMD、DTMD、TPD, a double tuned particle damper(Double Tuned Particle Damper, DTPD) is designed and established. In order to research the vibration control effect of DTPD in different fields, the main structure of the test is made according to the scale of 1:20. The prototype is a towering TV tower. According to the basic dynamic characteristic parameters of scale model structure, seismic action with different site types is selected as input. An experimental study on the vibration table of the scale-shrinkage model before and after the design of DTPD control for seismic action is carried out. The experimental results show that the designed DTPD can significantly reduce the absolute displacement response and absolute acceleration response of the scaled model under seismic load. The control effect of DTPD under medium earthquake is obviously better than that of DTPD under small earthquake. Under the conditions of small and moderate earthquakes, the peak acceleration damping rate, absolute displacement damping rate, and acceleration root-mean-square damping rate of the top acceleration of the test model under the fourth types of site ground motions are the corresponding parameters under the ground motion of the first type of site. The rate is 1.94~1.94 times, 1.79~1.92 times, 1.45~1.61 times. With the deterioration of site conditions, the dynamic response of the scale model tower increases, and the effect of DTPD’s damping control is generally increasing.
作者
陈彦江
黄建辉
许维炳
王瑾
沈铂坦
李娜娜
Chen Yan-jiang;Huang Jian-hui;Xu Wei-bing;Wang Jin;Shen Bo-tan;Li Na-na(Department of Urban Construction,Beijing University of Technology,Beijing 100124,China;School of Civil and Traffic Engineering,Shanghai Urban Construction Vocational College,Shanghai 200438,China)
出处
《工程抗震与加固改造》
北大核心
2022年第2期84-93,共10页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金青年基金项目(51908015,51978021)
国家重点研发计划资助项目(2017YFC1500604)
北京工业大学基础研究基金资助项目(004000546318524)
北京市教委科技计划一般资助项目(KM201910005020)。
关键词
双调谐颗粒阻尼器
振动台试验
场地类型
绝对位移响应
绝对加速度响应
double tuned particle damper
vibrator test
type of site
absolute displacement response
absolute acceleration response
