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河北工程大学土木工程学院, 河北 邯郸 056038
Received:17 February 2023,
Revised:2023-03-26,
Published:30 August 2024
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夏坤,肖雪,董林等.基于地震动参数的烈度评定标准对比研究[J].防灾减灾工程学报,2024,44(04):960-968.
XIA Kun,XIAO Xue,DONG Lin,et al.A Comparative Study on Seismic Intensity Evaluation Standards Based on Ground Motion Parameters: a Case Study of the Minxian‑Zhangxian Ms6.6 Earthquake[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(04):960-968.
夏坤,肖雪,董林等.基于地震动参数的烈度评定标准对比研究[J].防灾减灾工程学报,2024,44(04):960-968. DOI: 10.13409/j.cnki.jdpme.20230217001.
XIA Kun,XIAO Xue,DONG Lin,et al.A Comparative Study on Seismic Intensity Evaluation Standards Based on Ground Motion Parameters: a Case Study of the Minxian‑Zhangxian Ms6.6 Earthquake[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(04):960-968. DOI: 10.13409/j.cnki.jdpme.20230217001.
地震动参数是评定地震时地震烈度的参考依据,是烈度表的重要组成部分,尤其是在缺乏某些地震灾害判别现象的地区,地震动参数就成为非常有效的判别标准之一。对岷漳地震震区及周边获取的地震动记录进行处理和计算分析,得到水平向、三分向合成地震动参数和地震仪器烈度值;分别开展基于水平向地震动参数、三分向合成地震动参数和地震仪器烈度的烈度评定;探讨三种烈度评定方法对烈度评定结果的影响规律,从地震动参数定量参考指标角度验证现行地震烈度表与原有烈度表的一致性与差异性。结果表明:基于三分向合成地震动参数和地震仪器烈度的评定过程更为规范,结果更加具体和准确;基于三分向合成地震动参数和地震仪器烈度的烈度评定结果与实际宏观地震烈度符合良好,相差±1度以内的占比55%,相差±2度以内的占比91%,完全吻合率较之水平向地震动参数的烈度评定结果提高了18%。研究对于更加客观和科学地评定地震烈度具有重要意义和实用价值。
With the accumulation of earthquake damage experience
the deepening understanding of earthquakes
and the development of seismic observation instruments
researchers have persistently pursued the continuous modification of intensity standards to make intensity evaluations more objective and scientific. Ground motion parameters serve as a reference basis for assessing the seismic intensity of an earthquake and are an important component of seismic intensity scales. They are particularly effective in regions lacking certain seismic disaster discrimination phenomena. This paper processed and analyzed ground motion records obtained from the Minxian-Zhangxian Earthquake region and its surroundings to obtain horizontal
three-component synthetic ground motion parameters and seismic instrument intensity values. They study conducted seismic intensity evaluations based on horizontal ground motion parameters
three-component synthetic ground motion parameters
and seismic instrument intensity. It explored the influence of the three intensity evaluation methods on the results
verifying the consistency and differences between the current seismic intensity scale and the original intensity scale from the perspective of quantitative reference indicators of ground motion parameters. The results showed that: (1) The evaluation process based on three-component synthetic ground motion parameters and seismic instrument intensity was more standardized
with results being more specific and accurate. (2) The intensity evaluation results based on three-component synthetic ground motion parameters and seismic instrument intensity closely matched the actual macroseismic intensity
with 55% of the evaluations differing by ±1 degree and 91% differing by ±2 degrees. (3) The complete match rate improved by 18% compared to the intensity evaluation results based on horizontal ground motion parameters. This research holds significant importance and practical value for more objective and scientific seismic intensity evaluations.
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