| Probability-consistent spectrum and code spectrum |
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| 作者姓名： | 沈建文 石树中 |
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| 作者单位： | Seismological Bureau of Shanghai，Tongji University Shanghai 200062，China，Shanghai 200092，China |
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| 基金项目： | Shanghai Science & Technology Development Foundation (022512065) and Shanghai Construction Technology Development Foundation (A0206101). |
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| 摘 要： | IntroductionInChina,thecombinationofseismicdesigncodewithzoningmapofseismicintensityorgroundmotionparametersisusuallyadoptedtodeterminetheseismicfortificationcriterionforthegeneralindustryandcivilbuildings.Thepresentproceduresareasfollows.Accordingtothepro-jectlocation,thedesignbasicaccelerationofgroundmotionandthedesigncharacteristicperiodofresponsespectrumareobtainedfromthezoningmapofseismicgroundmotionparameters(GeneralAdministrationofQualitySupervision,InspectionandQuarantineofthePeople…
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Probability-consistent spectrum and code spectrum |
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| SHEN Jian-wen SHI Shu-zhong Seismological Bureau of Shanghai,Shanghai ,China, Tongji University,Shanghai ,China.Probability-consistent spectrum and code spectrum[J].Acta Seismologica Sinica(English Edition),2004,17(1):99-108. |
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| Authors: | SHEN Jian-wen SHI Shu-zhong Seismological Bureau of Shanghai Shanghai China Tongji University Shanghai China |
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| Institution: | 1. Seismological Bureau of Shanghai, Shanghai 200062, China
2. Tongji University, Shanghai 200092, China |
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| Abstract: | In the seismic safety evaluation (SSE) for key projects, the probability-consistent spectrum (PCS), usually obtained from probabilistic seismic hazard analysis (PSHA), is not consistent with the design response spectrum given by Code for Seismic Design of Buildings (GB50011-2001). Sometimes, there may be a remarkable difference be-tween them. If the PCS is lower than the corresponding code design response spectrum (CDS), the seismic fortifi-cation criterion for the key projects would be lower than that for the general industry and civil buildings. In the paper, the relation between PCS and CDS is discussed by using the ideal simple potential seismic source. The re-sults show that in the most areas influenced mainly by the potential sources of the epicentral earthquakes and the regional earthquakes, PCS is generally lower than CDS in the long periods. We point out that the long-period re-sponse spectra of the code should be further studied and combined with the probability method of seismic zoning as much as possible. Because of the uncertainties in SSE, it should be prudent to use the long-period response spectra given by SSE for key projects when they are lower than CDS. |
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| Keywords: | probability-consistent spectrum seismic code spectrum seismic fortification criterion potential seismic source long period |
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