基于新建筑抗震设计规范考虑场地土特性的人工波生成及可靠性研究
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摘要
基于新《建筑抗震设计规范》对场地土特性和人工波选择的要求,将地震动作为随机过程,利用修正胡聿贤-周锡元模型以及基于Hartley正交基的地震动随机过程经双调制生成不同场地土特性的人工地震波,以6层钢筋混凝土结构非线性随机地震反应分析为例,研究了不同场地土特性人工波对结构位移可靠度的影响。结果表明,场地土因素对人工波生成以及结构的动力响应影响较大,不同场地土人工波具有明显的统计学特性,均满足建筑抗震设计规范的选波要求,为最新《建筑抗震设计规范》要求考虑大量不同场地土效应的地震波生成提供了新的解决办法。
Based on the requirements of new seismic code for site soil properties and artificial seismic wave selection,this of paper considers the seismic action as a random process,and the stochastic process model acceleration generated by the orthogonal expansion of the modified Hu-Zhou model is modulated through the non-stationary intensity modulation index to generate artificial seismic waves of different soil properties.Taking the nonlinear random seismic response analysis of a 6-storey reinforced concrete structure as an example,the influence of artificial seismic waves on the reliability of structural displacement is studied.The results show that the site soil properties have a great influence on artificial seismic wave generation and the structures dynamic response,and the artificial seismic wave of different sites has obvious statistical characteristics,which meet the requirements of seismic wave selection and provide a new solution of providing seismic waves of different site soil properties for the latest seismic code.
Based on the requirements of new seismic code for site soil properties and artificial seismic wave selection,this of paper considers the seismic action as a random process,and the stochastic process model acceleration generated by the orthogonal expansion of the modified Hu-Zhou model is modulated through the non-stationary intensity modulation index to generate artificial seismic waves of different soil properties.Taking the nonlinear random seismic response analysis of a 6-storey reinforced concrete structure as an example,the influence of artificial seismic waves on the reliability of structural displacement is studied.The results show that the site soil properties have a great influence on artificial seismic wave generation and the structures dynamic response,and the artificial seismic wave of different sites has obvious statistical characteristics,which meet the requirements of seismic wave selection and provide a new solution of providing seismic waves of different site soil properties for the latest seismic code.
引文
[1] GB 50011-2010建筑抗震设计规范[S].2016.(GB 50011-2010 Code for Seismic Design of Buildings[S].2016.(in Chinese))
[2] 欧进萍,牛荻涛.地震地面运动随机过程模型的参数及其结构效应[J].哈尔滨建筑工程学院学报,1990,23(2):24-34.(OU Jin-ping,NIU Di-tao.Parameters in the random process models of earthquake ground motion and their effects on the response of structures[J].Journal of Harbin Architectural & Civil Engineering Institute,1990,23(2):24-34.(in Chinese))
[3] 李鸿晶,陈辰.一种平稳地震地面运动的改进金井清谱模型[J].工程力学,2014,31(2):158-163.(LI Hong -jing,CHEN Chen.A modified Kanai-tajimi special model for the stationary earthquake induced ground motion process[J].Engineering Mechanics,2014,31(2):158-163.(in Chinese))
[4] 彭凌云,周锡元,李小军.对已有强震地面运动功率谱模型的改进[J].北京工业大学学报,2011,37(3):388-394.(PENG Ling-yun,ZHOU Xi-yuan,LI Xiao -jun.Some improvements on exiting power spectral models of strong earthquake ground motion [J].Journal of Beijing University of Technology,2011,37(3):388-394.(in Chinese))
[5] 李小军,彭青.场地条件对地震动影响的经验估计[A].中国地震学会第八次学术大会[C].中国地震学会,2000.( LI Xiao -jun,PENG Qing.Empirical estimation of the effects of site conditions on ground motion [A].Proceedings of the Chinese Academy of seis-mology[C].China Seismological Society,2000.(in Chinese))
[6] 李杰,刘章军.基于标准正交基的随机过程展开法[J].同济大学学报(自然科学版),2006,34(10):1279-1283.(LI Jie,LIU Zhang-jun.Expansion method of stochastic processes based on normalized orthogonal bases[J].Journal of Tongji University(Natural Science Edition),2006,34(10):1279-1283.(in Chinese))
[7] 陈建兵,李杰.结构随机地震反应与可靠度的概率密度演化分析研究进展[J].工程力学,2014,31(4):1-10.(CHEN Jian-bing,LI Jie.Research progress of probability density evolution analysis of structural random seismic response and reliability[J].Engi -neering Mechanics,2014,31(4):1-10.(in Chinese))
[8] 李杰,陈建兵.随机动力系统中的概率密度演化方程及其研究进展[J].力学进展,2010,40(2):170-188.(LI Jie,CHEN Jian-bing.The evolution equation of probability density in stochastic dynamical systems and its research progress [J].Mechanics Progress,2010,40(2):170-188.(in Chinese))
[9] 陈建兵,李杰.基于概率密度演化方法的随机结构可靠度分析[J].计算力学学报,2004,21(3):285-290.(CHEN Jian-bing,LI Jie.Reliability analysis of stochastic structures based on probability density evolution method [J].Chinese Journal of Computational Mechanics,2004,21(3):285-290.(in Chinese))
[10] 刘章军.工程随机动力作用的正交展开理论及其应用研究[D].同济大学,2007.(LIU Zhang-jun.Orthogo -nal Expansion Method of Engineering Stochastic Dynamic Loads and Its Application [D].Tongji University,2007.(in Chinese))
[11] 薛素铎,王雪生,曹资.基于新抗震规范的地震动随机模型参数研究[J].土木工程学报,2003,36(5):5-10.(XUE Su-duo,WANG Xue -sheng,CAO Zi.Parameters study on seismic random model based on the new seismic code [J].China Civil Engineering Journal,2003,36(5):5-10.(in Chinese))
[12] 欧进萍,牛荻涛,杜修力.设计用随机地震动的模型及其参数确定[J].地震工程与工程振动,1991,11(3):45-54.(OU Jin-ping,NIU Di-tao,DU Xiu-li.Random earthquake ground motion model and its parameter determination used in aseismic design [J].Earthquake Engineering and Engineering Vibration,1991,11(3):45-54.(in Chinese))
[13] 阎盛海.建筑结构抗震分析[M].北京:中国建材工业出版社,1999.(YAN Sheng-hai.Seismic Analysis of Building Structures[M].Beijing:China Building Materials Industry Press,1999.(in Chinese))
[14] Chen J B,Li J.Dynamic response and reliability analysis of non-linear stochastic structures[J].Pro -babilistic Engineering Mechanics,2005,20(1):33-44.
[15] 陈建兵,李杰.非线性随机结构动力可靠度的密度演化方法[J].力学学报,2004,36(2):196-201.(CHEN Jian-bing,LI Jie.The probability density evolution method for dynamic reliability assessment of nonlinear stochastic structures [J].Acta Mechanica Sinica,2004,36(2):196-201.(in Chinese))
[2] 欧进萍,牛荻涛.地震地面运动随机过程模型的参数及其结构效应[J].哈尔滨建筑工程学院学报,1990,23(2):24-34.(OU Jin-ping,NIU Di-tao.Parameters in the random process models of earthquake ground motion and their effects on the response of structures[J].Journal of Harbin Architectural & Civil Engineering Institute,1990,23(2):24-34.(in Chinese))
[3] 李鸿晶,陈辰.一种平稳地震地面运动的改进金井清谱模型[J].工程力学,2014,31(2):158-163.(LI Hong -jing,CHEN Chen.A modified Kanai-tajimi special model for the stationary earthquake induced ground motion process[J].Engineering Mechanics,2014,31(2):158-163.(in Chinese))
[4] 彭凌云,周锡元,李小军.对已有强震地面运动功率谱模型的改进[J].北京工业大学学报,2011,37(3):388-394.(PENG Ling-yun,ZHOU Xi-yuan,LI Xiao -jun.Some improvements on exiting power spectral models of strong earthquake ground motion [J].Journal of Beijing University of Technology,2011,37(3):388-394.(in Chinese))
[5] 李小军,彭青.场地条件对地震动影响的经验估计[A].中国地震学会第八次学术大会[C].中国地震学会,2000.( LI Xiao -jun,PENG Qing.Empirical estimation of the effects of site conditions on ground motion [A].Proceedings of the Chinese Academy of seis-mology[C].China Seismological Society,2000.(in Chinese))
[6] 李杰,刘章军.基于标准正交基的随机过程展开法[J].同济大学学报(自然科学版),2006,34(10):1279-1283.(LI Jie,LIU Zhang-jun.Expansion method of stochastic processes based on normalized orthogonal bases[J].Journal of Tongji University(Natural Science Edition),2006,34(10):1279-1283.(in Chinese))
[7] 陈建兵,李杰.结构随机地震反应与可靠度的概率密度演化分析研究进展[J].工程力学,2014,31(4):1-10.(CHEN Jian-bing,LI Jie.Research progress of probability density evolution analysis of structural random seismic response and reliability[J].Engi -neering Mechanics,2014,31(4):1-10.(in Chinese))
[8] 李杰,陈建兵.随机动力系统中的概率密度演化方程及其研究进展[J].力学进展,2010,40(2):170-188.(LI Jie,CHEN Jian-bing.The evolution equation of probability density in stochastic dynamical systems and its research progress [J].Mechanics Progress,2010,40(2):170-188.(in Chinese))
[9] 陈建兵,李杰.基于概率密度演化方法的随机结构可靠度分析[J].计算力学学报,2004,21(3):285-290.(CHEN Jian-bing,LI Jie.Reliability analysis of stochastic structures based on probability density evolution method [J].Chinese Journal of Computational Mechanics,2004,21(3):285-290.(in Chinese))
[10] 刘章军.工程随机动力作用的正交展开理论及其应用研究[D].同济大学,2007.(LIU Zhang-jun.Orthogo -nal Expansion Method of Engineering Stochastic Dynamic Loads and Its Application [D].Tongji University,2007.(in Chinese))
[11] 薛素铎,王雪生,曹资.基于新抗震规范的地震动随机模型参数研究[J].土木工程学报,2003,36(5):5-10.(XUE Su-duo,WANG Xue -sheng,CAO Zi.Parameters study on seismic random model based on the new seismic code [J].China Civil Engineering Journal,2003,36(5):5-10.(in Chinese))
[12] 欧进萍,牛荻涛,杜修力.设计用随机地震动的模型及其参数确定[J].地震工程与工程振动,1991,11(3):45-54.(OU Jin-ping,NIU Di-tao,DU Xiu-li.Random earthquake ground motion model and its parameter determination used in aseismic design [J].Earthquake Engineering and Engineering Vibration,1991,11(3):45-54.(in Chinese))
[13] 阎盛海.建筑结构抗震分析[M].北京:中国建材工业出版社,1999.(YAN Sheng-hai.Seismic Analysis of Building Structures[M].Beijing:China Building Materials Industry Press,1999.(in Chinese))
[14] Chen J B,Li J.Dynamic response and reliability analysis of non-linear stochastic structures[J].Pro -babilistic Engineering Mechanics,2005,20(1):33-44.
[15] 陈建兵,李杰.非线性随机结构动力可靠度的密度演化方法[J].力学学报,2004,36(2):196-201.(CHEN Jian-bing,LI Jie.The probability density evolution method for dynamic reliability assessment of nonlinear stochastic structures [J].Acta Mechanica Sinica,2004,36(2):196-201.(in Chinese))