工程力学 ›› 2019, Vol. 36 ›› Issue (5): 192-199.doi: 10.6052/j.issn.1000-4750.2018.04.0242

• 土木工程学科 • 上一篇    下一篇

基于PSHA的核电厂近断层抗震设计谱构建方法

胡进军, 李琼林, 邬迪, 谢礼立   

  1. 中国地震局工程力学研究所 地震局地震工程与工程振动重点实验室, 哈尔滨 150080
  • 收稿日期:2018-04-17 修回日期:2019-01-02 出版日期:2019-05-25 发布日期:2019-04-10
  • 通讯作者: 胡进军(1978-),男,河北人,研究员,博士,主要从事地震动特征和设计地震动研究(E-mail:hujinjun@iem.ac.cn). E-mail:hujinjun@iem.ac.cn
  • 作者简介:李琼林(1986-),男,山东人,助理研究员,博士,主要从事岩土地震工程研究(E-mail:qionglin_li@126.com);邬迪(1989-),男,河南人,硕士生,主要从事地震工程研究(E-mail:wudi1989@gmail.com);谢礼立(1939-),男,上海人,教授,院士,主要从事防灾工程研究(E-mail:llxie@iem.ac.cn).
  • 基金资助:
    国家自然科学基金重点项目(51238012)

CONSTRUCTION METHOD OF THE NEAR FAULT SEISMIC DESIGN SPECTRUM FOR NUCLEAR POWER PLANTS BASED ON PROBABILISTIC SEISMIC HAZARD ANALYSIS

HU Jin-jun, LI Qiong-lin, WU Di, XIE Li-li   

  1. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
  • Received:2018-04-17 Revised:2019-01-02 Online:2019-05-25 Published:2019-04-10

摘要: 核电是一种高效、清洁的能源,随着核电厂未来向内陆区的发展,其可能会遭遇到近断层地震动的影响,但是目前我国核电厂抗震规范设计谱并未考虑近断层地震动。该文首先基于大量实际近断层脉冲型和相应无脉冲地震动记录,研究了脉冲对反应谱的放大效应,建立了修正的近断层脉冲放大系数模型;继而将地震动脉冲效应引入到近断层概率地震危险性分析中,并基于设定断层模型,给出了不同场地类型的一致危险性反应谱;通过对地震危险性结果的分解,分析了对场地最危险震级和距离,并将结果引入地震动衰减关系中得到设计谱,最后通过近断层脉冲放大系数对设计谱进行修正,得到考虑近断层脉冲效应的核电厂抗震设计谱。通过研究,建立了一种基于概率地震危险性分析框架下,考虑近断层脉冲型地震动的工程场地核电厂抗震设计谱的构建方法。

关键词: 地震概率危险性分析, 核电厂, 近断层脉冲型地震动, 修正脉冲放大系数, 抗震设计谱

Abstract: Nuclear power is efficient and clean energy. The construction of inland nuclear power plants in the future needs to consider the near-fault effect of ground motions. However, the effect on the design spectrum of nuclear power plants in China has not been taken into account. Based on a large number of real ground motions including near-fault pulse-like and non-pulse records, the amplification effect of pulses on the acceleration spectrum is studied, and a modified near-fault pulse amplification coefficient model is established. The effect of near-fault pulse is then introduced into the probabilistic seismic hazard analysis, and the uniform hazard spectra are calculated for a scenario fault model. By decomposing the result of the seismic hazard analysis, the most dangerous earthquake magnitude and fault distance for a site are obtained. They are then used in the attenuation relation to calculate the design spectrum of the site. Finally, the design spectrum is modified by the near-fault pulse amplification coefficient, and the seismic design spectrum considering the near-fault pulse effect is obtained. The calculation method of the seismic design spectrum for nuclear power plant sites is provided in the framework of probabilistic seismic hazard analysis. The effect of near fault pulse-like ground motion is considered in this method.

Key words: probabilistic seismic hazard analysis, nuclear power plant, near-fault pulse-like ground motion, pulse amplification coefficient, seismic design spectrum

中图分类号: 

  • TM623
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