地震模拟振动台基础动力反应的比较研究
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摘要
针对某一拟建的6 m×8 m三向六自由度地震模拟振动台基础,应用《动力机器基础设计规范》方法、拉普拉斯变换法和动力阻抗法,分别计算其动力响应,经计算结果对比发现:由于各方法采用的基本参数的求取方法不同,计算得到的加速度响应在低频区和中频区存在一定的差异,但在高频区趋向一致。通过参数分析,建议振动台基础设计分析可根据规范确定地基刚度,参照Lysmer比拟法计算阻尼。
For a 6 m × 8 m three-way six-DOF seismic shaking table foundation,three methods such as the method carried in Code for Dynamic Machine Foundation Design,the Laplace-Transform method and dynamic impedance method are applied respectively to calculate its dynamic response.A comparison of the results show s that the acceleration responses obtained w ith different methods are coincident in higher frequency w hile divergent in low er and intermediate frequency ranges.It is suggested on the basis of parameter analysis that the groundsill stiffness be calculated according to the Code and the damping computed against the Lysmer analogue method w hen the design of seismic shaking table foundation is analyzed.
For a 6 m × 8 m three-way six-DOF seismic shaking table foundation,three methods such as the method carried in Code for Dynamic Machine Foundation Design,the Laplace-Transform method and dynamic impedance method are applied respectively to calculate its dynamic response.A comparison of the results show s that the acceleration responses obtained w ith different methods are coincident in higher frequency w hile divergent in low er and intermediate frequency ranges.It is suggested on the basis of parameter analysis that the groundsill stiffness be calculated according to the Code and the damping computed against the Lysmer analogue method w hen the design of seismic shaking table foundation is analyzed.
引文
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[4]国家技术监督局,中华人民共和国机械工业部.GB50040—1996动力机器基础设计规范[S].北京:中国计划出版社,1997.
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[6]侯兴民,廖振鹏,黄浩华.动力基础频域响应分析[J].工程力学,2003,20(4):122-127.
[7]中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.GB50007—2011建筑地基基础设计规范[S].北京:中国建筑工业出版社,2012.
[8]严人觉,王贻荪,韩清宇.动力基础半空间理论概论[M].北京:中国建筑工业出版社,1981.
[9]廖振鹏.工程波动理论导引[M].2版.北京:科学出版社,2004.
[10]Pais Artur,Kausel Eduardo.Approximate Formulas for Dynam-ic Stiffness of Rigid Foundations[J].Soil Dynamics and Earth-quake Engineering,1988,7(4):213-227.
[11]Dominguez J.Dynamic Stiffness of Rectangular Foundation[R].Report No.R 78-20,Dept.of Civil Engineering,MIT.Ma,1978.
[12]Wong H L,Luco J E.Dynamic Response of Rigid Foundationsof Arbitrary Shape[J].Earthquake Eng.and Struct.Dynamics,1976,6:3-16.
[2]方重.大型地震模拟振动台主要参数的确定及技术经济分析[J].世界地震工程,2001,17(4):135-138.
[3]张自平,程绍革,贺军.三向六自由度大型模拟地震振动台基础动力分析计算[J].建筑科学,2004,20(2):36-40.
[4]国家技术监督局,中华人民共和国机械工业部.GB50040—1996动力机器基础设计规范[S].北京:中国计划出版社,1997.
[5]黄浩华.地震模拟振动台的设计与应用技术[M].北京:地震出版社,2008.
[6]侯兴民,廖振鹏,黄浩华.动力基础频域响应分析[J].工程力学,2003,20(4):122-127.
[7]中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.GB50007—2011建筑地基基础设计规范[S].北京:中国建筑工业出版社,2012.
[8]严人觉,王贻荪,韩清宇.动力基础半空间理论概论[M].北京:中国建筑工业出版社,1981.
[9]廖振鹏.工程波动理论导引[M].2版.北京:科学出版社,2004.
[10]Pais Artur,Kausel Eduardo.Approximate Formulas for Dynam-ic Stiffness of Rigid Foundations[J].Soil Dynamics and Earth-quake Engineering,1988,7(4):213-227.
[11]Dominguez J.Dynamic Stiffness of Rectangular Foundation[R].Report No.R 78-20,Dept.of Civil Engineering,MIT.Ma,1978.
[12]Wong H L,Luco J E.Dynamic Response of Rigid Foundationsof Arbitrary Shape[J].Earthquake Eng.and Struct.Dynamics,1976,6:3-16.
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