纯滚动隔震系统位移计算方法的对比分析
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摘要
针对纯滚动隔震系统,根据其地震位移反应规律,编制了数值分析程序;采用实验方法和理论分析方法,对比分析了数值分析程序和传统的刚塑性力位移曲线方法。结果表明,数值分析程序比较合理,计算结果比较精确,且偏于保守;传统的刚塑性力位移曲线方法不合理,计算结果偏小;地震作用下,结构的最大相对位移可能超越地面的最大绝对位移。
With the isolation system based on pure rolling as the object of study,the computer program was develeped to calculate its seismic displacement based on its characteristics.And then,experiment method and theory analysis method were adopted to analyze the new computer program and the traditional calculation method's rationality in contrast.It is shown that the computer program is reasonable,and its results are relatively accurate and conservative.The traditional calculation method based on the rigid-plastic relation of force and displacement is illogical,and its results are relatively small.When subjected to earthquakes,the structure's maximum relative displacement would be larger than the earth's maximum absolute displacement.
With the isolation system based on pure rolling as the object of study,the computer program was develeped to calculate its seismic displacement based on its characteristics.And then,experiment method and theory analysis method were adopted to analyze the new computer program and the traditional calculation method's rationality in contrast.It is shown that the computer program is reasonable,and its results are relatively accurate and conservative.The traditional calculation method based on the rigid-plastic relation of force and displacement is illogical,and its results are relatively small.When subjected to earthquakes,the structure's maximum relative displacement would be larger than the earth's maximum absolute displacement.
引文
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[2]Fan F G,Ahmadi G,Mostaghel N,et al.Performanceanalysis of aseismic base isolation systems for a multi-story building[J].Soil Dynamics and EarthquakeEngineering,1991,10(3):152-171.
[3]李宏男,霍林生.结构多维减震控制[M].北京:科学出版社,2008.
[4]Ou Y C,Song J W,Lee G C.A parametric study ofseismic behavior of roller seismic isolation bearings forhighway bridges[J].Earthquake Engineering andStructure Dynamics,2010,39:541-559.
[5]Lee G C,Ou Y C,Niu T C,et al.Characterization of aroller seismic isolation bearing with supplemental energydissipation for highway bridges[J].Journal ofStructural Engineering,2010,136(5):502-510.
[6]Jangid R S,Londhe Y B.Effectiveness of ellipticalrolling rods for base isolation[J].Journal of StructuralEngineering,1998,124(4):469-472.
[7]Jangid R S.Stochastic seismic response of structuresisolated by rolling rods[J].Engineering Structures,2000,22:937-946.
[8]Guerreiro L,Azevedo J,Muhr A H.Seismic tests andnumerical modeling of a rolling-ball isolation system[J].Journal of Earthquake Engineering,2007,11:49-66.
[9]舒文超.桥梁与房屋结构水平地震力隔离理论与试验研究[D].长沙:长沙铁道学院,1998.
[10]史红福,樊剑,李黎.滚动基础隔震机构的动力分析[J].振动与冲击,2005,24(6):91-94.SHI Hongfu,FAN Jian,LI Li.Dynamic analysis ofstructure isolated by rolling base[J].Journal ofVibration and Shock,2005,24(6):91-94.
[11]王荣辉,许群,舒文超,等.竖向弹簧—钢球隔震系统的隔离水平地震作用[J].华南理工大学学报:自然科学版,2003,31(6):20-25.WANG Ronghui,XU Qun,SHU Wenchao,et al.Horizontal earthquake isolating funetion of the verticalspring-steel rolling base isolation seismic system[J].Nature Science of Journal of South China University ofTechnology,2003,31(6):20-25.
[12]Fahjan Y,Ozdemir Z.Scaling of earthquake accelerogramsfor non-linear dynamic analysis to match the earthquakedesign spectra[C]//The 14th World Conference onEarthquake Engineering,Beijing,China,2008.
[13]Clough R W,Penzien J.Dynamics of structures[M].New York:Mc Graw-hill,Inc,1993.
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