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本文分析了现行抗震设计规范(TJ 11—78)的抗震设防标准,以随机事件发生的概率来确定抗震设防中“罕遇的大地震”与“发生概率密度最大的中、小地震”的定义。通过对地震危险性结果的统计分析,得到了“发生概率密度最大的中、小地震”,烈度与基本烈度的关系以及基本烈度分別为7、8、9度地区“罕遇的大震”烈度的对应值;为贯彻“小震不坏、大震不倒”的抗震设计原则提供了依据。
This paper analyzes the seismic fortification standards of the current Seismic Design Code (TJ 11-78) and uses the probability of random events to determine the definition of “a rare and rare earthquake” and the “small and medium-sized earthquake with the highest probability density” in seismic fortification. . Through the statistical analysis of the seismic hazard results, we obtained the “major and minor earthquakes with the highest probability density,” and the relationship between the intensity and the basic intensity, and the intensity of the “very large earthquake” in the regions of 7, 8, and 9 degrees respectively. The corresponding value; provides the basis for implementing the seismic design principles of “small earthquakes are not bad, large earthquakes do not fall”.