Prediction Method of First-Level Earthquake Warning for High Speed Railway Based on Two-Parameter Threshold of Seismic P-Wave

被引：7
|
作者：
Song J. [1 ,2 ]
Jiao C. [1 ,2 ]
Li S. [1 ,2 ]
Hou B. [1 ,2 ]
机构：
[1] Institute of Engineering Mechanics, China Earthquake Administration, Harbin, 150080, Heilongjiang
[2] Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, Harbin, 150080, Heilongjiang
来源：
Li, Shanyou (lishanyou@126.com) | 2018年 / Chinese Academy of Railway Sciences卷 / 39期
关键词：
Earthquake warning; High speed railway; Maximum vertical displacement; Predominant period; Seismic P-wave;
D O I：
10.3969/j.issn.1001-4632.2018.01.19
中图分类号：
学科分类号：
摘要：
In order to improve the timeliness of earthquake emergency response for high speed railway and meet the requirements for effectiveness, the prediction method of first-level earthquake warning for high speed railway was studied using the thresholds of the predominant period τc and the peak amplitude of vertical displacement Pd from P-wave arrivals. The linear relationships were derived between τc and earthquake magnitude M and between Pd and the earthquake acceleration PGA from the time windows of 1 s, 2 s and 3 s after P-wave arrivals using Japanese K-net strong ground motion data. The method called “four levels prediction method” of the first-level earthquake warning for high speed railway was proposed by using the threshold of τc corresponding to M=6 and the threshold of Pd corresponding to PGA=40 cm·s-2 at 3 time windows of P-wave based on these two statistical relationships mentioned above. Level 3 is defined as the prediction standard for the first-level earthquake warning of high speed railway. The effectiveness and timeliness of the “four levels prediction method” were analyzed using the strong ground motion data recorded by the K-net stations along the Kyushu Shinkansen in Kumamoto earthquake (Mj=6.5) on April 14, 2016. Results show that the method can accurately predict first-level earthquake warning after the first 1 s P-wave arrival in the station KMM006 which is closest to the source of the earthquake. Meanwhile, this alert time is 3.34 s and 4.84 s earlier than the Kyushu Shinkansen derailment time and the Japan Meteorological Agency (JMA) Earthquake Early Warning (EEW) issued time, respectively. The proposed method can meet the needs for the development of earthquake monitoring and early warning system for high speed railway. © 2018, Editorial Department of China Railway Science. All right reserved.
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页码：138 / 144
页数：6
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