摘要
地铁振动对多高层框架结构有一定影响,以广州某教学楼为例进行了研究。首先测量了建筑场地的环境振动,发现场地z向振级大于水平振级,并超出限值要求;将场地最不利加速度时程作为一致激励进行了上部结构的振动响应分析,结果表明3.15-31.5 Hz频段的振动被放大,结构的z向振级逐层增大;对教学楼基底设置钢弹簧隔振装置后,分析结果表明该措施可有效降低23%的地铁振动,并满足限值要求。
The vibration caused by subway has a certain effect on muhilayer frame structures and high-rise frame structures. Aiming at the vibration isolation issues of a certain teaching building located in Guangzhou City, the environmental vibration of the building site was measured. It was shown that the vertical vibration level of the building site is beyond the limit of codes and higher than the horizontal vibration level; in the dynamic response analysis of the upper structure, the most unfavorable vibration acceleration time history of the building site is taken as a consistent excitation to the upper structure, its vibration response of 3.15Hz - 31.5Hz is amplified, the vertical vibration level of the structure increases layer by layer; the vertical vibration caused by subway reduces by 23% and meets the limit of codes after puting a steel spring floating vibration isolation device on the base of the building.
出处
《振动与冲击》
EI
CSCD
北大核心
2015年第4期184-189,共6页
Journal of Vibration and Shock
基金
华南理工大学亚热带建筑科学国家重点实验室开放基金资助项目(2014KB28)
关键词
地铁
环境振动
1/3倍频程
一致激励
基底隔振
subway
environmental vibration
1/3 octave
consistent excitation
base vibration isolation
