地震作用下浮放设备摆动反应研究
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摘要
目的研究浮放设备在实际地震波输入下摆动反应特性.方法根据浮放设备摆动反应分析理论,分析了浮放设备在地震作用下发生摆动的初始条件、发生倾倒的临界条件,给出了浮放设备在地震作用下摆动反应计算分析方法,采用Runge-Kutta法求解浮放设备地震摆动反应运动微分方程,编制了相应的计算软件进行了浮放设备地震摆动反应数值模拟研究,得到了浮放设备在真实地震波输入下摆动反应时程及计算结果.结果算例分析结果表明(1)浮放设备宽高比越大,地震摇摆反应越小,反之则易于发生倾倒现象;(2)当浮放设备的宽高比相同时,浮放设备尺寸越小摆动反应越大,越容易倾倒,尺寸越大越稳定;(3)设备宽高比相同的情况下,设备尺寸越大发生倾倒用时越长;宽高比相对较小的设备,当尺寸较大时,发生倾倒所用时间也相对较长.结论由于输入了真实地震波,计算得出浮放设备反应时程及结果是可靠的.
Based on the oscillation response theory of free-standing equipment,the initial condition for occurrence of oscillation and the critical condition for falling down of free-standing equipment under seismic excitations are analyzed.The calculation method for seismic oscillation response analysis is presented.The differential equation of oscillation of free-standing equipment under seismic excitations is resolved by Runge-Kutta algorithm,the software is developed,and the reliability of the software is validated by numerical illustrations.The oscillation response characteristics of free-standing equipment are investigated by using the developed software,and the oscillation response time history and some reasonable results of free-standing equipment under seismic excitations are also obtained.
Based on the oscillation response theory of free-standing equipment,the initial condition for occurrence of oscillation and the critical condition for falling down of free-standing equipment under seismic excitations are analyzed.The calculation method for seismic oscillation response analysis is presented.The differential equation of oscillation of free-standing equipment under seismic excitations is resolved by Runge-Kutta algorithm,the software is developed,and the reliability of the software is validated by numerical illustrations.The oscillation response characteristics of free-standing equipment are investigated by using the developed software,and the oscillation response time history and some reasonable results of free-standing equipment under seismic excitations are also obtained.
引文
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[7]张俊勇,唐家祥.地震中室内浮放设备的混沌响应[J].工程力学,1997,14(4):76-82.
[8]张俊勇,唐家祥.江宜城.浮放物的地震响应及防倾覆措施研究[J].振动工程学报,1997,10(4):501-505.
[9]Yim C S.Rocking response of rigid blocks to earth-quake[J].Earthquake Engineering and Structural Dy-namics,1980,8:565-587.
[10]Haider A A,Nelson L,Emad G.A simple displace-ment-based model for predicting seimically inducedoverturning[J].Journal of Earthquake Engineering,2006,10(6):775-814.
[2]Takuzo Iwatsubo.Damage to industrial equipment inthe 1995 HyogokenNanbu Earthquake[J].NuclearEngineering and Design,1998(8):41-53.
[3]Housner G W.The behavior of inverted pendulumstructures during earthquakes.Bull[J].SeismologicalSoc.of Am,1963,53(2):403-417.
[4]陆钦年,唐家祥.浮放式设备的抗震设计[D].北京:第五届全国地震工程学术会议,1998.
[5]王云剑.设备浮放抗震技术标准[S].哈尔滨:中国地震局工程力学研究所,2000.
[6]张俊勇,唐家祥.地震动摆动作用下室内浮放设备的响应[J].华中理工大学学报,1997,25(5):88-90.
[7]张俊勇,唐家祥.地震中室内浮放设备的混沌响应[J].工程力学,1997,14(4):76-82.
[8]张俊勇,唐家祥.江宜城.浮放物的地震响应及防倾覆措施研究[J].振动工程学报,1997,10(4):501-505.
[9]Yim C S.Rocking response of rigid blocks to earth-quake[J].Earthquake Engineering and Structural Dy-namics,1980,8:565-587.
[10]Haider A A,Nelson L,Emad G.A simple displace-ment-based model for predicting seimically inducedoverturning[J].Journal of Earthquake Engineering,2006,10(6):775-814.
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