场地相关设计反应谱特征周期的统计分析
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摘要
利用近年来的工程场地地震安全性评价和地震小区划工作的成果 ,对上述工作中得到的场地相关反应谱的特征周期取值进行统计分析 ,并收集现有的强震记录计算其反应谱 ,将上述两个结果同两个版本的抗震设计规范 (GBJ11 89和GB5 0 0 11 2 0 0 1)中的规定进行比较。发现上述两本规范中的特征周期取值在不同程度上小于实际场地情况的统计平均值。其中 ,虽然GB5 0 0 11 2 0 0 1规范相对于GBJ11 89规范更加接近实际场地的情况 ,但仍然在一些情况下取值偏小
According to the results of site seismic hazard analysis completed in the last decade, 96 site-related design spectra are selected as samples in this study. The result shows that the value of the corner period (T_g) of the design spectrum in GBJ11-89 (China Seismic Building Code, issued in 1989) is less than the value obtained by site seismic hazard analysis. Same thing happens when we compare the design spectra of the Codes to the spectra according to the earthquake records. The value in current seismic design code, GBJ50011-2001, issued in 2001, is greater than that in GBJ11-89, but still less than the value got by site seismic hazard analysis. If we accept the value got by site seismic hazard analysis, we have a suspicion that 2/3 buildings built according to GBJ11-89 are not safe when an earthquake with 2% probabilities of exceedance in 50 years occurs.
According to the results of site seismic hazard analysis completed in the last decade, 96 site-related design spectra are selected as samples in this study. The result shows that the value of the corner period (T_g) of the design spectrum in GBJ11-89 (China Seismic Building Code, issued in 1989) is less than the value obtained by site seismic hazard analysis. Same thing happens when we compare the design spectra of the Codes to the spectra according to the earthquake records. The value in current seismic design code, GBJ50011-2001, issued in 2001, is greater than that in GBJ11-89, but still less than the value got by site seismic hazard analysis. If we accept the value got by site seismic hazard analysis, we have a suspicion that 2/3 buildings built according to GBJ11-89 are not safe when an earthquake with 2% probabilities of exceedance in 50 years occurs.
引文
国家地震局,1991,中国地震烈度区划图。北京:地震出版社。
胡聿贤,1988,地震工程学,北京:地震出版社。
胡聿贤,1999,地震安全性评价技术教程,北京:地震出版社。
李小军,彭青,刘文忠,2001,设计地震动参数确定中的场地影响考虑,世界地震工程,17(4),34～41。
汤泉,1998,中华人民共和国防震减灾法释义,北京:中国法制出版社。
汪素云,武宦英,1993,华北地区地震烈度衰减关系,中国地震区划文集,国家地震局震害防御司编,北京:地震出版社。
周锡元,樊水荣,苏经宇,1999,场地分类和设计反应谱的特征周期,工程抗震,(4),3～8。
中华人民共和国建设部,1989,建筑抗震设计规范GBJ1189。北京:中国建筑工业出版社。
中华人民共和国建设部,2001,建筑抗震设计规范GB500112001。北京:中国建筑工业出版社。
中华人民共和国建设部,2001,中国地震动参数区划图GB183062001。北京:中国标准出版社。
IAEE ,1996,“Regulationsforseismicdesign:Aworldlist1996”,东京,日本。
胡聿贤,1988,地震工程学,北京:地震出版社。
胡聿贤,1999,地震安全性评价技术教程,北京:地震出版社。
李小军,彭青,刘文忠,2001,设计地震动参数确定中的场地影响考虑,世界地震工程,17(4),34～41。
汤泉,1998,中华人民共和国防震减灾法释义,北京:中国法制出版社。
汪素云,武宦英,1993,华北地区地震烈度衰减关系,中国地震区划文集,国家地震局震害防御司编,北京:地震出版社。
周锡元,樊水荣,苏经宇,1999,场地分类和设计反应谱的特征周期,工程抗震,(4),3～8。
中华人民共和国建设部,1989,建筑抗震设计规范GBJ1189。北京:中国建筑工业出版社。
中华人民共和国建设部,2001,建筑抗震设计规范GB500112001。北京:中国建筑工业出版社。
中华人民共和国建设部,2001,中国地震动参数区划图GB183062001。北京:中国标准出版社。
IAEE ,1996,“Regulationsforseismicdesign:Aworldlist1996”,东京,日本。
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