不同阻尼比反应谱的转换关系
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摘要
不同阻尼比的反应谱的转换关系在我国各类抗震设计规范中有重要应用。以大崎顺彦的转换关系为数学模型,以包含可靠长周期信息的260条基岩记录为基础,进行统计分析,得到新的0.04—10 s的不同阻尼比反应谱的转换关系。新转换关系弥补了4—10 s的长周期部分,并首次考虑了距离对强震持时的影响,可以应用于阻尼比连续变化的反应谱的转换。先对0.04—4 s内的数据回归出结果,与大崎顺彦的结果作对比。然后,再对0.04—10 s内的数据回归出结果,再与大崎顺彦的结果作对比。与大崎顺彦的结果虽有差异,但随阻尼比、震级的增大而基本趋于一致。新的转换关系将为《核电厂抗震设计规范》、《建筑抗震设计规范》、《电力设施抗震设计规范》等相关规范的制订和修改提供参考。
Transfer relationship among response spectra with different damping ratios has found applications in different kinds of seismic design codes of China.Using the transfer relationship proposed by Ohsaki as the mathematical model and based on 260 bedrock records containing reliable long-period information,a new transfer relationship among response spectra with different damping ratios in the natural period range from 0.04s to 10.0 s is obtained by regress analysis.This new transfer relationship not only makes up the long-period part from 4.0 s to 10.0 s,but also takes into account for the first time the influence of distance on the strong-shaking duration,and thus it can be used in the transfer of response spectra with continuously changing damping ratios.Firstly,the results are regressed from the data in the period range of 0.04 s through 4.0 s and are compared with those obtained by Ohsaki.And then the results corresponding to the period range of 0.04 s through 10.0 s are regressed and compared with those of Ohsaki.Although different from the results of Ohsaki,the results of the new model basically tends to be consistent with the increase of damping ratio and magnitude.This new transfer relationship provides the reference for the revisions of seismic design codes for nuclear power plants,buildings,and electric power installations,etc.
Transfer relationship among response spectra with different damping ratios has found applications in different kinds of seismic design codes of China.Using the transfer relationship proposed by Ohsaki as the mathematical model and based on 260 bedrock records containing reliable long-period information,a new transfer relationship among response spectra with different damping ratios in the natural period range from 0.04s to 10.0 s is obtained by regress analysis.This new transfer relationship not only makes up the long-period part from 4.0 s to 10.0 s,but also takes into account for the first time the influence of distance on the strong-shaking duration,and thus it can be used in the transfer of response spectra with continuously changing damping ratios.Firstly,the results are regressed from the data in the period range of 0.04 s through 4.0 s and are compared with those obtained by Ohsaki.And then the results corresponding to the period range of 0.04 s through 10.0 s are regressed and compared with those of Ohsaki.Although different from the results of Ohsaki,the results of the new model basically tends to be consistent with the increase of damping ratio and magnitude.This new transfer relationship provides the reference for the revisions of seismic design codes for nuclear power plants,buildings,and electric power installations,etc.
引文
[1]GB50260-97核电厂抗震设计规范[S].北京:中国计划出版社,1998.
[2]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[3]GB50260-96电力设施抗震设计规范[S].北京:中国计划出版社,1996.
[4]日本电气协会.JEAG4601-1987原子力发电所耐震设计技术指针[S].
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[2]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[3]GB50260-96电力设施抗震设计规范[S].北京:中国计划出版社,1996.
[4]日本电气协会.JEAG4601-1987原子力发电所耐震设计技术指针[S].
[5]周雍年,周正华,于海英.设计反应谱长周期区段的研究[J].地震工程与工程振动,2004,24(2):15-18.
[6]胡聿贤,地震工程学[M].2版.北京:地震出版社,2006.
[7]GB50191-93构筑物抗震设计规范[S].北京:中国计划出版社,1993.
[8]中国地震局地球物理研究所.广东阳江核电站厂址地震安全性评价报告[R].北京:中国地震局地球物理研究所,2005.
[9]中国地震灾害防御中心.湖北浠水核电工程初步可行性研究阶段地震地质专题[R].北京:中国地震灾害防御中心,2005.
[10]陈勇.强地震动的长周期特性[D].北京:中国地震局地球物理研究所,2008.
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