几种仪器烈度算法在汶川地震与芦山地震中的可靠性比较

破坏性地震发生后， 特别是在通信中断的情况下， 利用仪器烈度快速估计地震动强度(烈度)的分布情况， 可为开展最有效的地震应急救援提供决策依据. 该文介绍了现有的几种仪器烈度算法， 并利用汶川地震与芦山地震中获得的强震加速度记录对各种算法的可靠性进行了比较. 结果表明， 在这两次地震中只利用地震动峰值参数确定仪器烈度的算法可靠性较低， 而考虑反应谱特性的算法可靠性更高. 在未得到更多强震数据的检验前， 建议采用袁一凡提出的仪器烈度算法， 或利用谱烈度值确定仪器烈度的算法， 或利用加速度反应谱值确定仪器烈度的算法.

Reliability comparison of instrumental seismic intensity algorithms in 2008 Wenchuan earthquake and 2013 Lushan earthquake

Rapid and reliable estimation of strong ground motion (or seismic intensity) distribution based on instrumental seismic intensity can give security to earthquake emergency response soon after a destructive earthquake, especially on the situation of communication interruption. The reliabilities of eight instrumental seismic intensity algorithms are discussed using the acceleration records obtained in Wenchuan earthquake and Lushan earthquake. The results indicate that the instrumental seismic intensity evaluated by peak parameters of ground motion, such as PGA or PGV, are of lower reliabilities than the instrumental seismic intensity derived from response spectra. We suggest that the instrumental seismic intensity evaluated by Professor Yuan's algorithm, by Housner's spectrum intensity, or by response spectra, could be accepted in China until more data are available to propose a more reliable algorithm.