从爆破烈度看仪器烈度的算法

以某次工程爆破的地震动测试结果为例,对《中国地震烈度表》、日本气象厅JMA系统、美国ShakeMap系统、福建省地方标准以及袁一凡教授提出的烈度算法进行了对比分析,讨论了以地震动参数为基础的仪器烈度计算方法,提出了将袁一凡仪器烈度算法中的PGA改为水平分向合成峰值,忽略持时和主频两个参数并修改个各参数权重的意见。经分析认为,袁一凡仪器烈度算法和福建省地方标准中的仪器烈度算法在处理大中小震时结果较为合理,且袁一凡仪器烈度算法保留了继续研究地震烈度机理的学术空间和扩展应用领域的可能。

Algorithm comparison of instrument seismic intensity based on data of blast seismic intensity

According to the intensity calculation from observation data of an engineering blasting vibration test, we made the intensity algorithm comparisons among the following methods proposed by China Seismic Intensity Scale＂, Japan Meteorological Agency JMA System, American ShakeMap System, Fujian Provincial Standards and Professor Yuan Yi-fan. We discuss the calculation methods of seismic intensity based on the strong motion parameters from the data of instrumental observation. We put forward a new calculation method, in which the synthetic peak value of the horizontal component instead of PGA are used in the instrument seismic intensity calculation formulae Professor Yuan Yi-fan proposed, and also put forward the suggestion that both time series and main frequency parameters are not used and the different weight are used to the parameters. Our calculation results show that the algorithms of Yuan Yi-fan instrument intensity formula and Fujian Provincial Standard are suitable for small, moderate and strong earthquakes.