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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Spatial variation of maximum considered and design basis earthquakes in peninsular India
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Spatial variation of maximum considered and design basis earthquakes in peninsular India

机译：印度半岛最大考虑和设计基准地震的空间变化

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摘要

Realistic seismic hazard assessment is essential for carrying out safe and economic design of structures. The zone factors corresponding to seismic hazard in different parts of India that has been specified in the IS code (IS 1893:2002) does not fullyconsider the recent advances in understanding of seismic hazard in peninsular India. The recent damaging earthquakes in this region have indicated that the seismic zonation may not be accurate. The MCE-level peak horizontal accelerations may also be underestimated, considering the damage caused by moderate to large earthquakes in the past. The IS code also assumes a uniform ratio of maximum considered earthquake (MCE) to design basis earthquake (DBE) as 2, which may result in non-uniform margin of safety at MCE level ground motions. These issues have been discussed in this article based on probabilistic seismic hazard assessment of peninsular India. It is shown that uniform level of safety against MCE cannot be achieved in both peninsular India as well as the seismically active regions. It is also shown that the MCE-level ground motion earthquake is significantly underestimated in large parts of peninsular India.
机译：现实的地震危险性评估对于进行结构的安全和经济设计至关重要。 IS代码（IS 1893：2002）中已指定与印度不同地区的地震危险相对应的区域因子，并未完全考虑印度半岛对地震危险的最新认识。该地区最近发生的破坏性地震表明，地震分区可能不准确。考虑到过去中度到大型地震造成的破坏，MCE级峰值水平加速度也可能被低估。 IS代码还假定最大考虑地震（MCE）与设计基准地震（DBE）的均匀比率为2，这可能会导致MCE级地面运动的安全裕度不一致。本文基于印度半岛的概率地震灾害评估，对这些问题进行了讨论。结果表明，在印度半岛以及地震活跃地区都无法达到针对MCE的统一安全水平。研究还表明，在印度半岛的大部分地区，MCE级地面运动地震被大大低估了。

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