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M. Bour P. Dominique J.L. Blès P. Godefroy† C. Martin M. Terrier 《Journal of Seismology》2000,4(3):231-245
The seismotectonic zonation of Metropolitan France(part 1) and the derived seismic zonation (part 2)were carried out in order to facilitate andstandardise the application of earthquake-resistantbuilding regulations to critical facilities forreasons of environmental protection (Decree No.91-461, Ministerial Order dated 10 May 1993).According to current French legislation, adeterministic approach was adopted for the executionof these two successive zonations.The seismic zonation is based on a 2.5 km square gridcovering the whole of Metropolitan France, in whicheach cell is defined by the maximal macroseismicintensities that could be induced by a `MaximumHistorically Credible Earthquake' (MHCE) and aSeismic Safety Evaluation Earthquake (SSEE) innearby seismotectonic units. The values of theseintensities were calculated by displacing thereference earthquakes of the seismotectonic zonationto the most penalising position relative to the celland using attenuation laws deduced from the isoseismalcurves specific to each earthquake taken as reference.The zonations obtained for the MHCE and SSEEintensities should thus be considered as the physicalzonations of France for the application ofearthquake-resistant building regulations to criticalfacilities. They are applicable to all criticalfacilities and provide a consistent approach forassessing the levels of seismic aggression to be used(in MSK intensity) at any site in Metropolitan France,as well as the elementary parameters for calculatingthe response spectra usable in the design orverification of structures. 相似文献
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Julian Bommer Robin Spence Mustafa Erdik Shigeko Tabuchi Nuray Aydinoglu Edmund Booth Domenico del Re Oliver Peterken 《Journal of Seismology》2002,6(3):431-446
Following the devastating Kocaeli and Düzce earthquakes of August andNovember 1999, the Turkish Government was faced with an enormousfinancial burden as a result of its statutory obligation to cover the full costsof rebuilding. In order to offset this liability in the future – which has hadan adverse effect on the Government's economic programme – acompulsory earthquake insurance scheme has been introduced for allhouseholders in Turkey. A key element for successful implementation ofthis novel and ambitious programme is the transfer of the earthquake riskabsorbed by the Turkish Catastrophe Insurance Pool (TCIP) to theinternational reinsurance market. An earthquake loss model, described inthis paper, has been developed for the TCIP to serve as a basis for thedecision-making process with respect to the pricing of its insurance policy,risk control, the purchase of reinsurance, and the transfer of seismic risk.Sample results of the loss calculations are presented. 相似文献
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Enrico Priolo 《Journal of Seismology》1999,3(3):289-309
This study wants to estimate the strong ground motion in the municipal area of Catania (Italy) for a catastrophic earthquake scenario. It is part of a larger research program funded by the National Research Council – National Group for the Defence Against Earthquakes (CNR-GNDT), The Catania Project, devoted to evaluating the seismic risk of a highly urbanised area, such as that of Catania, located in a seismically active region. The reference earthquake simulates the catastrophic event (M 7.2) of 1693. The ground shaking is computed solving the 2-D full-wave equation by the Chebyshev spectral element method (SPEM). Particular emphasis is given to the construction of realistic structural models, also including the finest local detail, obtained from the geophysical, geological and geotechnical data available. Simulations are performed for several sources, to account for both a change in source position and orientation, and the finite extension of the fault along its dip. Synthetic seismograms and peak ground acceleration (PGA) envelopes, calculated at the surface for four transects across the Catania area, constitute the main result of this study which can be used for practical purposes. Simulations show that ground motion is strongly influenced by both source characteristics and crustal structure. We have found that PGA values range between 0.1 g and 0.5 g, although particular site conditions strongly affect these values locally. For example, the frequencies of maximum interest in civil engineering (1.5–4 Hz) are enhanced selectively by a thick portion of surface sediments (i.e., 30–100 m for an average shear wave velocity of 500–600 m/s). An unexpected feature is the appreciable increase of PGA at large epicentral distances, which contradicts classical attenuation relations. All the results are examined through an analysis of the propagating wavefield. 相似文献
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采用现代仪器地震记录和烈度资料,我们建立了用于定量估算历史地震震级和震中位置的烈度衰减模型和分析方法,并对我国西南川滇地区的历史和近代地震的震中和震级进行了重新分析.利用20世纪以来该地区十四个有仪器记录的地震（5.9≤Ms≤8.0）及相应的烈度数据,对其烈度-震级-震中距衰减关系进行标定,并建立了用于震中和震级估算的烈度衰减模型.结果表明,当震级一定时,川滇地区烈度随震中距增大而衰减的速率明显小于美国加州地区（～60%）.在衰减模型基础之上,发展了确定震中区域和震级的网格搜索试算方法（GSTSL）,并给出了确定震中位置和震级的等值线置信值.采用所建立的分析方法,对1786年康定地震,1850年西昌地震,1913年峨山地震和1970年通海地震进行了分析,给出了更为精确合理的结果. 相似文献
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