振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2015年
4期
184-189
,共6页
地铁%环境振动%1 /3 倍频程%一致激励%基底隔振
地鐵%環境振動%1 /3 倍頻程%一緻激勵%基底隔振
지철%배경진동%1 /3 배빈정%일치격려%기저격진
subway%environmental vibration%1 /3 octave%consistent excitation%base vibration isolation
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。
地鐵振動對多高層框架結構有一定影響，以廣州某教學樓為例進行瞭研究。首先測量瞭建築場地的環境振動，髮現場地 z 嚮振級大于水平振級，併超齣限值要求；將場地最不利加速度時程作為一緻激勵進行瞭上部結構的振動響應分析，結果錶明3．15－31．5 Hz 頻段的振動被放大，結構的 z 嚮振級逐層增大；對教學樓基底設置鋼彈簧隔振裝置後，分析結果錶明該措施可有效降低23％的地鐵振動，併滿足限值要求。
지철진동대다고층광가결구유일정영향，이엄주모교학루위례진행료연구。수선측량료건축장지적배경진동，발현장지 z 향진급대우수평진급，병초출한치요구；장장지최불리가속도시정작위일치격려진행료상부결구적진동향응분석，결과표명3．15－31．5 Hz 빈단적진동피방대，결구적 z 향진급축층증대；대교학루기저설치강탄황격진장치후，분석결과표명해조시가유효강저23％적지철진동，병만족한치요구。
The vibration caused by subway has a certain effect on multilayer 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.
