振动台试验中地震动选择及输入顺序研究
|
摘要
振动台试验是研究和评价结构抗震性能的主要方法之一。在振动台试验中,按相似理论设计的缩尺模型,通过一系列特定顺序地震动的输入,激励起模型结构的动力反应,来研究和评价结构的抗震性能。对于进入非线性的模型结构来说,振动台试验是个不可逆过程。因此如何选择地震动,以及如何确定地震动的输入顺序,对振动台试验成功与否,显得尤为重要。本文提出以主要周期点处地震动反应谱的包络值与设计反应谱相差不超过20%的方法选择地震动;按主要周期点处多向地震动反应谱的加权求和值大小确定地震动输入顺序;最后将该方法应用到八层可再生混凝土框架模型振动台试验中。试验结果表明,按本文方法所选的地震动可以合理地评价结构的抗震行为,地震动输入顺序可以逐步激励起结构的动力反应。
Shaking table test is one of the major methods to study and evaluate the seismic performance of structures.In a shaking table test,the scaled model designed by using the theory of similarity is excited by the selected earthquake ground motions in a specified sequence to excite the dynamic responses,which are used to study and evaluate the structural seismic performance.Due to the nonlinear history of the model,a shaking table test is an irreversible process.Then how to select the ground motion input and determine the input sequence is very important for the success of the shaking table test.This paper proposes that the ground motion inputs could be selected by setting the difference between the envelop value of the response spectra of earthquake ground motions at major structural periods and the value of the design response spectrum to be less than 20% of the value of the design response spectrum.The input sequence could be determined according to the weighted sum of the response spectra of earthquake grond motions in multi-directions at major structural periods.The shaking table test of an 8-story renewable reinforced concrete frame is applied to verify the method.The experimental results show that the seismic performance of the structure could be reasonably evaluated by the selected ground motions and the dynamic responses could be excited according to the input sequence determined by the proposed method in this paper.
Shaking table test is one of the major methods to study and evaluate the seismic performance of structures.In a shaking table test,the scaled model designed by using the theory of similarity is excited by the selected earthquake ground motions in a specified sequence to excite the dynamic responses,which are used to study and evaluate the structural seismic performance.Due to the nonlinear history of the model,a shaking table test is an irreversible process.Then how to select the ground motion input and determine the input sequence is very important for the success of the shaking table test.This paper proposes that the ground motion inputs could be selected by setting the difference between the envelop value of the response spectra of earthquake ground motions at major structural periods and the value of the design response spectrum to be less than 20% of the value of the design response spectrum.The input sequence could be determined according to the weighted sum of the response spectra of earthquake grond motions in multi-directions at major structural periods.The shaking table test of an 8-story renewable reinforced concrete frame is applied to verify the method.The experimental results show that the seismic performance of the structure could be reasonably evaluated by the selected ground motions and the dynamic responses could be excited according to the input sequence determined by the proposed method in this paper.
引文
[1]周颖,吕西林.建筑结构振动台模型试验方法与技术[M].北京:科学出版社,2012.ZHOU Ying,LU Xilin.Method and technology for shaking table model test of building structures[M].Beijing:Science Press,2012.(in Chi-nese)
[2]王亚勇,戴国莹.《建筑抗震设计规范》的发展沿革和最新修订[J].建筑结构学报,2010,31(6):02-16.WANG Yayong,DAI Guoying.Evolution and present updation of‘Code for Seismic Design of Buildings’[J].Journal of Building Structures,2010,31(6):2-16.(in Chinese)
[3]滕军,董志君,容柏生,等.弹性单自由度体系能量反应谱研究[J].建筑结构学报,2008,S1:129-133.TENG Jun,DONG Zhijun,RONG Baisheng,et al.Energy spectra of elastic SDOF systems[J].Journal of Building Structures,2008,S1:129-133.(in Chinese)
[4]王亚勇.关于设计反应谱、时程法和能量方法的探讨[J].建筑结构学报,2000,21(1):71-76.WANG Yayong.A review of response spectra,time history analysis and energy method[J].Journal of Building Structures,2000,21(1):71-76.(in Chinese)
[5]胡冗冗,王亚勇.地震动瞬时能量与结构最大位移反应关系研究[J].建筑结构学报,2000,21(1):21-28.HU Rongrong,WANG Yayong.A study on relation of instantaneous energy of earthquake strong motion and maximum displacement response ofstructures[J].Journal of Building Structures,2000,21(1):21-28.(in Chinese)
[6]曲哲,叶列平,潘鹏.建筑结构弹塑性时程分析中地震动记录选取方法的比较研究[J].土木工程学报,2011,44(7):10-21.QU Zhe,YE Lieping,PAN Peng.Comparative study on methods of selecting earthquake ground motions for nonlinear time history analyses ofbuilding structures[J].China Civil Engineering Journal,2011,44(7):10-21.(in Chinese)
[7]Jayaram N,Lin T,Baker J W.A computationally efficient ground-motion selection algorithm for matching a target response spectrum mean andvariance[J].Earthquake Spectra,2011,27(3):797-815.
[8]Baker J W.Conditional mean spectrum:Tool for ground motion selection[J].Journal of Structural Engineering,2011,137(3):322-331.
[9]Baker J W,Jayaram N.Correlation of spectral acceleration values from NGA ground motion models[J].Earthquake Spectra,2008,24(1):299-317.
[10]杨溥,李英民,赖明.结构时程分析法输入地震波的选择控制指标[J].土木工程学报,2000,33(6):33-37.YANG Pu,LI Yingmin,LAI Ming.A new method for selecting inputting waves for time history analysis[J].China Civil Engineering Journal,2000,33(6):33-37.(in Chinese)
[11]邓军,唐家祥.时程分析法输入地震记录的选择与实例[J].工业建筑,2000,30(8):9-12.DENG Jun,TANG Jiaxiang.Choice and measurement of seismic records for time-history analysis[J].Industrial Construction,2000,30(8):9-12.(in Chinese)
[12]谢礼立,翟长海.最不利设计地震动研究[J].地震学报,2003,25(3):250-261.XIE Lili,ZHAI Changhai.Study on the severest real ground motion for seismic design and analysis[J].Acta Seismologica Sinica,2003,25(3):250-261.(in Chinese)
[13]翟长海,谢礼立.抗震结构最不利设计地震动研究[J].土木工程学报,2005,38(12):51-58.ZHAI Changhai,XIE Lili.The severest design ground motion for seismic design and analysis of structure[J].China Civil Engineering Journal,2005,38(12):51-58.(in Chinese)
[14]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011-2010 Code for Seismic Design of Buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[2]王亚勇,戴国莹.《建筑抗震设计规范》的发展沿革和最新修订[J].建筑结构学报,2010,31(6):02-16.WANG Yayong,DAI Guoying.Evolution and present updation of‘Code for Seismic Design of Buildings’[J].Journal of Building Structures,2010,31(6):2-16.(in Chinese)
[3]滕军,董志君,容柏生,等.弹性单自由度体系能量反应谱研究[J].建筑结构学报,2008,S1:129-133.TENG Jun,DONG Zhijun,RONG Baisheng,et al.Energy spectra of elastic SDOF systems[J].Journal of Building Structures,2008,S1:129-133.(in Chinese)
[4]王亚勇.关于设计反应谱、时程法和能量方法的探讨[J].建筑结构学报,2000,21(1):71-76.WANG Yayong.A review of response spectra,time history analysis and energy method[J].Journal of Building Structures,2000,21(1):71-76.(in Chinese)
[5]胡冗冗,王亚勇.地震动瞬时能量与结构最大位移反应关系研究[J].建筑结构学报,2000,21(1):21-28.HU Rongrong,WANG Yayong.A study on relation of instantaneous energy of earthquake strong motion and maximum displacement response ofstructures[J].Journal of Building Structures,2000,21(1):21-28.(in Chinese)
[6]曲哲,叶列平,潘鹏.建筑结构弹塑性时程分析中地震动记录选取方法的比较研究[J].土木工程学报,2011,44(7):10-21.QU Zhe,YE Lieping,PAN Peng.Comparative study on methods of selecting earthquake ground motions for nonlinear time history analyses ofbuilding structures[J].China Civil Engineering Journal,2011,44(7):10-21.(in Chinese)
[7]Jayaram N,Lin T,Baker J W.A computationally efficient ground-motion selection algorithm for matching a target response spectrum mean andvariance[J].Earthquake Spectra,2011,27(3):797-815.
[8]Baker J W.Conditional mean spectrum:Tool for ground motion selection[J].Journal of Structural Engineering,2011,137(3):322-331.
[9]Baker J W,Jayaram N.Correlation of spectral acceleration values from NGA ground motion models[J].Earthquake Spectra,2008,24(1):299-317.
[10]杨溥,李英民,赖明.结构时程分析法输入地震波的选择控制指标[J].土木工程学报,2000,33(6):33-37.YANG Pu,LI Yingmin,LAI Ming.A new method for selecting inputting waves for time history analysis[J].China Civil Engineering Journal,2000,33(6):33-37.(in Chinese)
[11]邓军,唐家祥.时程分析法输入地震记录的选择与实例[J].工业建筑,2000,30(8):9-12.DENG Jun,TANG Jiaxiang.Choice and measurement of seismic records for time-history analysis[J].Industrial Construction,2000,30(8):9-12.(in Chinese)
[12]谢礼立,翟长海.最不利设计地震动研究[J].地震学报,2003,25(3):250-261.XIE Lili,ZHAI Changhai.Study on the severest real ground motion for seismic design and analysis[J].Acta Seismologica Sinica,2003,25(3):250-261.(in Chinese)
[13]翟长海,谢礼立.抗震结构最不利设计地震动研究[J].土木工程学报,2005,38(12):51-58.ZHAI Changhai,XIE Lili.The severest design ground motion for seismic design and analysis of structure[J].China Civil Engineering Journal,2005,38(12):51-58.(in Chinese)
[14]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011-2010 Code for Seismic Design of Buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心