近断层速度脉冲的地震动特性研究
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摘要
在搜集了大量近断层具有速度脉冲的记录后,对有速度脉冲和无速度脉冲的记录的反应谱和特征周期进行了对比,将近断层记录的反应谱与我国规范标准反应谱进行了比较,还将各次地震有速度脉冲记录的反应谱和特征周期与规范标准谱及规范给出的特征周期进行了比较.通过比较可知,在长周期段(大约在1.5s以后),有速度脉冲记录的反应谱值要比无速度脉冲记录的反应谱值大;计算特征周期时,对于近断层记录,T1和T2有后延的趋势,采用不固定频段的方法计算更加合理;无论是相对我国规范的Ⅰ类还是Ⅱ类场地,有速度脉冲记录的特征周期比规范中给出的值都要大,均在规范值的2倍以上.
Through collection of a large number of near-fault records containing velocity pulses, the response spectra and the characteristic periods of records containing no pulses are compared with those of records containing pulses. Response spectra of near-fault records are compared with standard spectra given by code; furthermore, the response spectra and the characteristic periods of each earthquake are compared with that given by the code. The result shows that at long periods (longer than 1.5 s), the response spectrum of pulse-containing records is bigger than the response spectrum of no-pulse-containing records; when the characteristic period of near-fault records is calculated, the method that does not fix frequency is more reasonable because the T_1 and T_2 have a lagging tendency; regardless of the site I and site II, the characteristic period of pulse-containing records is over twice bigger than the characteristic period given by the code.
Through collection of a large number of near-fault records containing velocity pulses, the response spectra and the characteristic periods of records containing no pulses are compared with those of records containing pulses. Response spectra of near-fault records are compared with standard spectra given by code; furthermore, the response spectra and the characteristic periods of each earthquake are compared with that given by the code. The result shows that at long periods (longer than 1.5 s), the response spectrum of pulse-containing records is bigger than the response spectrum of no-pulse-containing records; when the characteristic period of near-fault records is calculated, the method that does not fix frequency is more reasonable because the T_1 and T_2 have a lagging tendency; regardless of the site I and site II, the characteristic period of pulse-containing records is over twice bigger than the characteristic period given by the code.
引文
胡聿贤.1988.地震工程学[M].北京:地震出版社,155
胡聿贤主编.2001.《中国地震动参数区划图》宣贯教材[M].北京:中国标准出版社,86~87
李新乐,朱.2003.近场地震速度脉冲效应及模拟模型的研究[J].中国安全科学学报,13(12):48~52
李新乐,朱.2004.近断层地震动等效速度脉冲研究[J].地震学报,26(6):634~642
王京哲,朱.2003.近场地震速度脉冲下的反应谱加速度敏感区[J].中国铁道科学,24(6):27~30
邬鑫,朱.2003.近场地震的速度脉冲效应及简化冲击回归公式的检验[J].北方交通大学学报,27(1):36~39
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周雍年,于海英.2001.集集地震记录的长周期反应谱特性[A].见:大型复杂结构的关键科学问题及设计理论研究论文集[C].大连:大连理工大学出版社,25~31
中华人民共和国国家标准.2001.建筑抗震设计规范[M].北京:中国建筑工业出版社,17~18
Alavi B,Krawinkler H.2000.Consideration of near-fault motion effectsin seismic design[A].In:12WCEE[C],Auck-land:I AEE,Paper No.2665
Bertero V.1976.Establishment of design earthquakes evaluation of present methods[J].Symp Earthquake StructuralEngg,1:551~580
Bouchon M,Bouin M,Karabulut H,et al.2001.Howfast is rupture during an earthquake?Newinsights fromthe1999Turkey earthquake[J].Geophys Res Lett,28(14):2723~2726
Hall J F,Heaton T H,Halling M W,et al.1995.Near-source ground motion and its effects on flexible buildings[J].Earthquake Spectra,11(4):569~605
Kawase H,Aki K.1990.Topography effect at the critical SV-waveincidence:possible explanation of damage pattern bythe Whittier Narrows,California,earthquake of1October1987[J].Bull Seism Soc Amer,80:1~22
Mavroeidis G P,Dong G,Papageorigiou AS.2004.Near-fault ground motions,and the response of elastic andinelasticsingle-degree-of-freedom(SDOF)systems[J].Earthquake Engng Struct Dyn,33:1023~1049
Oglesby D,Archuleta R.1997.Afaulting model for the1992Petrolia earthquake:can extreme ground acceleration be asource effect?[J].J Geophys Res,102(B6):11877~11897
Orozco G L,Ashford S A.2002.Effects of large velocity pulses on reinforced concrete bridge columns[A].PEER Re-port[R].Berkeley:University of California,(23):10~12
Sasani M,Bertero V.2000.I mportance of severe pulse-type ground motionin Performance-based engineering:Historicaland Critical review[A].In:12WCEE[C].Auckland:I AEE,Paper No.1302
Somerville P,Graves R.1993.Conditions that give rise to unusuallylargelong period ground motions[J].The Structur-al Design of Tall Buildings,2:211~232
Somerville P G.1998.Development of an I mproved ground motion representation for near fault ground motion[A].In:SMIP98eds.Seminar on Utilization of Strong-Motion Data[C].Oakland:CA,1~20
胡聿贤主编.2001.《中国地震动参数区划图》宣贯教材[M].北京:中国标准出版社,86~87
李新乐,朱.2003.近场地震速度脉冲效应及模拟模型的研究[J].中国安全科学学报,13(12):48~52
李新乐,朱.2004.近断层地震动等效速度脉冲研究[J].地震学报,26(6):634~642
王京哲,朱.2003.近场地震速度脉冲下的反应谱加速度敏感区[J].中国铁道科学,24(6):27~30
邬鑫,朱.2003.近场地震的速度脉冲效应及简化冲击回归公式的检验[J].北方交通大学学报,27(1):36~39
周锡元,王国权,杨润林,等.2001.1999年9月21日台湾集集地震中不同场地上峰值加速度的衰减特征[A].见:大型复杂结构的关键科学问题及设计理论研究论文集[C].大连:大连理工大学出版社,406~413
周雍年,于海英.2001.集集地震记录的长周期反应谱特性[A].见:大型复杂结构的关键科学问题及设计理论研究论文集[C].大连:大连理工大学出版社,25~31
中华人民共和国国家标准.2001.建筑抗震设计规范[M].北京:中国建筑工业出版社,17~18
Alavi B,Krawinkler H.2000.Consideration of near-fault motion effectsin seismic design[A].In:12WCEE[C],Auck-land:I AEE,Paper No.2665
Bertero V.1976.Establishment of design earthquakes evaluation of present methods[J].Symp Earthquake StructuralEngg,1:551~580
Bouchon M,Bouin M,Karabulut H,et al.2001.Howfast is rupture during an earthquake?Newinsights fromthe1999Turkey earthquake[J].Geophys Res Lett,28(14):2723~2726
Hall J F,Heaton T H,Halling M W,et al.1995.Near-source ground motion and its effects on flexible buildings[J].Earthquake Spectra,11(4):569~605
Kawase H,Aki K.1990.Topography effect at the critical SV-waveincidence:possible explanation of damage pattern bythe Whittier Narrows,California,earthquake of1October1987[J].Bull Seism Soc Amer,80:1~22
Mavroeidis G P,Dong G,Papageorigiou AS.2004.Near-fault ground motions,and the response of elastic andinelasticsingle-degree-of-freedom(SDOF)systems[J].Earthquake Engng Struct Dyn,33:1023~1049
Oglesby D,Archuleta R.1997.Afaulting model for the1992Petrolia earthquake:can extreme ground acceleration be asource effect?[J].J Geophys Res,102(B6):11877~11897
Orozco G L,Ashford S A.2002.Effects of large velocity pulses on reinforced concrete bridge columns[A].PEER Re-port[R].Berkeley:University of California,(23):10~12
Sasani M,Bertero V.2000.I mportance of severe pulse-type ground motionin Performance-based engineering:Historicaland Critical review[A].In:12WCEE[C].Auckland:I AEE,Paper No.1302
Somerville P,Graves R.1993.Conditions that give rise to unusuallylargelong period ground motions[J].The Structur-al Design of Tall Buildings,2:211~232
Somerville P G.1998.Development of an I mproved ground motion representation for near fault ground motion[A].In:SMIP98eds.Seminar on Utilization of Strong-Motion Data[C].Oakland:CA,1~20
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