| 一致概率谱与规范谱ht |
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| 引用本文： | 沈建文,石树中.一致概率谱与规范谱ht[J].地震学报,2004,26(1):94-101. |
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| 作者姓名： | 沈建文 石树中 |
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| 作者单位： | 1) 中国上海200062上海市地震局
2) 中国上海200092同济大学 |
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| 基金项目： | 上海市科技发展基金，上海市建设技术发展基金 |
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| 摘 要： | 在重大工程的地震安全性评价工作中，根据概率法地震危险性分析得到的一致概率反应谱，与建筑抗震设计规范给出的设计反应谱常常不一致，有时甚至会有较大的差异．一致概率反应谱低于相应的规范反应谱时，可能会产生重大工程抗震设防标准低于一般工业与民用建筑抗震设防标准的问题．本文利用理想简化的潜在震源，对一致概率谱与规范设计反应谱之间的关系进行了讨论．分析结果表明，对于较为普遍的主要受直下型地震和近震潜源影响的地区，在长周期部分，一致概率谱总体小于规范谱．规范谱长周期部分值得深入研究，且应尽可能与区划工作的概率法相结合．由于地震安全性评价工作存在较大的不确定性，故重大工程的抗震设防标准，据地震安全性评价结果将长周期部分降至规范谱（一般工民建）之下宜慎重．
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| 关 键 词： | 一致概率谱& 规范谱& 抗震设计标准& 潜在震源& 长周期 |
| 文章编号： | 0253-3782(2004)01-0094-08 |
| 修稿时间： | 2002年11月11 |
PROBABILITY-CONSISTENT SPECTRUM AND CODE SPECTRUM |
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| Shen Jianwen Shi Shuzhong Seismological Bureau of Shanghai,Shanghai ,China Tongji University,Shanghai ,China.PROBABILITY-CONSISTENT SPECTRUM AND CODE SPECTRUM[J].Acta Seismologica Sinica,2004,26(1):94-101. |
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| Authors: | Shen Jianwen Shi Shuzhong Seismological Bureau of Shanghai Shanghai China Tongji University Shanghai China |
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| Institution: | Shen Jianwen 1) Shi Shuzhong 2) 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-consis tent spectrum (PCS), usually obtained from probabilistic seismic hazard analysis (PSHA), is not consistent with the design response spectrum given by Code for S eismic Design of Buildings (GB50011-2001). Sometimes, there may be a remarkable difference between them. If the PCS is lower than the corresponding code design response spectrum (CDS), the seismic fortification criterion for the key projec ts 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 results show that in the most areas influenced mai nly by the potential sources of the epicentral earthquakes and the regional eart hquakes, PCS is generally lower than CDS in the long periods. We point out that the long-period response spectra of the code should be further studied and comb ined 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 respon se spectra given by SSE for key projects when they are lower than CDS. |
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| Keywords: | probability-consiste nt spectrum seismic code spectrum seismic fortification criterion potential s eismic source long period |
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