摘要
利用环境激励,采用时域法模态拟合方法对异形平面组合空腹夹层板楼盖结构进行了现场竖向振动模态测试,得到组合楼盖结构前4阶竖向振型、自振频率、阻尼比等参数,并与有限元软件计算出的振型对比分析;对异形平面组合空腹夹层版楼盖进行6种工况作用下的人致振动加速度时程测试,分别得到各工况下不同测点的加速度时程曲线及相应各测点的加速度峰值。结果表明,现场实测和有限元分析得到的组合空腹夹层板楼盖自振频率均远大于3Hz,且两者误差在5%之内;楼盖阻尼比均小于005;最不利工况下异形组合空腹夹层板楼盖竖向最大加速度峰值为0036m/s2,其自振频率和加速度峰值均满足《高层建筑混凝土结构技术规程》(JGJ 3—2010)和《组合楼板设计与施工规范》(CECS 273—2010)要求,楼盖应用在大跨度异形平面中具有较好的舒适度。
Based on environmental excitation,the vertical vibration modal test of the irregular plane composite open-web sandwich plate structure was carried out by using time-domain modal fitting method,and the parameters such as the first four vertical vibration modes,natural frequency and damping ratio of the composite plate structure were obtained,and compared with the vibration modes calculated by the finite element software.The acceleration time history of human induced vibration of irregular plane composite open-web sandwich plate structure under six working conditions was tested,and the acceleration time history curves of different measuring points under each working condition and the acceleration peak values of corresponding measuring points were obtained respectively.The results show that the natural frequencies of the composite open-web sandwich plate obtained from field measurement and finite element analysis are much greater than 3Hz,and the error between them is within 5%.The floor damping ratio is less than 005.Under the most unfavorable working conditions,the maximum vertical acceleration peak value of irregular plane composite open-web sandwich plate is 0036m/s2.The natural frequency and acceleration peak value of the plate meet the requirements of Technical specification for concrete structures of tall building(JGJ 3—2010)and Code for composite slabs design and construction(CECS 273—2010).The plate has good comfort when applied in the long-span irregular plane.
作者
卢亚琴
肖同
马克俭
魏艳辉
王勤征
陈靖
LU Yaqin;XIAO Tong;MA Kejian;WEI Yanhui;WANG Qinzheng;CHEN Jing(Space Structures Research Center,Guizhou University,Guiyang 550025,China;Key Laboratory of Structural Engineering of Guizhou Province,Guiyang 550025,China)
出处
《建筑结构》
北大核心
2024年第7期113-117,112,共6页
Building Structure
基金
贵州省科技计划项目(黔科合基础[2018]1038)
贵州大学引进人才科研项目(贵大人基合字(2016)16号)
贵州省科技计划项目(黔科合基础[2019]1090)。
关键词
异形平面
组合楼盖
自振频率
加速度峰值
舒适度
irregular plane
composite plate
natural frequency
acceleration peak value
comfort
