基于新抗震规范的地震动随机模型参数研究
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摘要
本文依据新颁布的《建筑抗震设计规范》(GB50011-2001),对随机地震动功率谱模型参数的取值进行了具体研究。提出了与新规范建筑场地类别及设计地震分组相对应的场地土阻尼比和卓越频率,非平稳模型中时间包络函数及地震动持时的取值。采用最大地面加速度等效原则确定了谱强度因子S0,然后进一步根据反应谱等效原则对谱强度因子进行了修正。经与规范中给出的反应谱曲线对比发现,利用本文模型参数按随机方法得到的反应谱与规范反应谱取得了很好的一致性。本文研究中给出的谱强度因子S0较好地反应了结构地震作用的特点,为应用随机理论进行实际工程抗震设计提供了依据。
A parameter study on seismic random model based on the new seismic code is carried out. The spectral intensity parameter S0 is proposed in the paper. It is found that the S0 can be determined by the equivalence of the maximum ground acceleration. Then, it is further modified by the equivalence of the response spectrum. The comparison between the response spectral is made. The random response spectrum got from the proposed So is in a good agreement with that given by the new code. It is confirmed that the seismic effects on the structures can be well reflected by the proposed S0.
A parameter study on seismic random model based on the new seismic code is carried out. The spectral intensity parameter S0 is proposed in the paper. It is found that the S0 can be determined by the equivalence of the maximum ground acceleration. Then, it is further modified by the equivalence of the response spectrum. The comparison between the response spectral is made. The random response spectrum got from the proposed So is in a good agreement with that given by the new code. It is confirmed that the seismic effects on the structures can be well reflected by the proposed S0.
引文
[1] 王雪生,薛素铎,曹资.结构多维地震作用研究综述及展望(I)-地震动输入[J].世界地震工程,2001,17(4) :27-33
[2] 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) :45-53
[3] 洪峰,江近仁,李玉亭.地震地面运动的功率谱模型及其参数的确定[J].地震工程与工程振动,1994,14(2) :46-51
[4] 张治勇,孙柏涛,宋天舒.新抗震规范地震动功率谱模型参数的研究 [J].世界地震工程,2000,16(3) :33-38
[5] 建筑抗震设计规范 GB50011-2001[S].北京:中国建筑工业出版社,2001
[6] Kanai K.An empirical formula for the spectrum of strong earthquakemotions[J].Bull.Earthquake Res Inst.,Univ.Tokyo,1961,39,85-95
[7] 胡聿贤,周锡元.弹性体在平稳和平稳化地面运动下的反应[A].地震工程研究报告集第一集[C].北京:科学出版社,1962,33-50
[8] 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
[9] Clough R W,Penzien J.Dynamics of Structures[M].2nd edition,New York,McGraw-Hill,Inc.,1993
[10] 陈国兴,金永彬,宰金珉.高层建筑随机地震反应的简捷计算[J].南京建筑工程学院学报,1999,(1) :29-37
[11] Housner G W, Jennings P C. Generation of Artificial Earthquake[J]. J. of the Engineering Mechanics Division, ASCE, 1964,90(1) :113-150
[12] Amin M, Ang A H S. Nonstationary Stochastic Model of Earthquake Motion[J]. J. Engineering Mechanics Division, ASCE, 1968． 94(EM2) :559-584
[13] 李桂青,曹宏,李秋胜,霍达.结构动力可靠性理论及其应用[M].北京:地震出版社,1993
[14] 江近仁,洪峰.功率谱与反应谱的转换和人造地震波[J].地震工程与工程振动,1984,4(3) :1-10
[15] 欧进萍,刘会仪.基于随机地震动模型的结构随机地震反应谱及其应用[J].地震工程与工程振动,1994,14(3) :14-23
[16] 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
[2] 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) :45-53
[3] 洪峰,江近仁,李玉亭.地震地面运动的功率谱模型及其参数的确定[J].地震工程与工程振动,1994,14(2) :46-51
[4] 张治勇,孙柏涛,宋天舒.新抗震规范地震动功率谱模型参数的研究 [J].世界地震工程,2000,16(3) :33-38
[5] 建筑抗震设计规范 GB50011-2001[S].北京:中国建筑工业出版社,2001
[6] Kanai K.An empirical formula for the spectrum of strong earthquakemotions[J].Bull.Earthquake Res Inst.,Univ.Tokyo,1961,39,85-95
[7] 胡聿贤,周锡元.弹性体在平稳和平稳化地面运动下的反应[A].地震工程研究报告集第一集[C].北京:科学出版社,1962,33-50
[8] 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
[9] Clough R W,Penzien J.Dynamics of Structures[M].2nd edition,New York,McGraw-Hill,Inc.,1993
[10] 陈国兴,金永彬,宰金珉.高层建筑随机地震反应的简捷计算[J].南京建筑工程学院学报,1999,(1) :29-37
[11] Housner G W, Jennings P C. Generation of Artificial Earthquake[J]. J. of the Engineering Mechanics Division, ASCE, 1964,90(1) :113-150
[12] Amin M, Ang A H S. Nonstationary Stochastic Model of Earthquake Motion[J]. J. Engineering Mechanics Division, ASCE, 1968． 94(EM2) :559-584
[13] 李桂青,曹宏,李秋胜,霍达.结构动力可靠性理论及其应用[M].北京:地震出版社,1993
[14] 江近仁,洪峰.功率谱与反应谱的转换和人造地震波[J].地震工程与工程振动,1984,4(3) :1-10
[15] 欧进萍,刘会仪.基于随机地震动模型的结构随机地震反应谱及其应用[J].地震工程与工程振动,1994,14(3) :14-23
[16] 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
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