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本文根据龙陵地震观场调查的震害资料,讨论了这次强震群震害分布的特点,认为同一地区在多次强震作用下震害的迭加效应是很明显的,震害程度是多次地震作用的总后果。指出,仅用宏观调查的方法只能是粗略地加以区分,若能配合微观手段布设连续多次触发的强震仪台网,观测地震地面运动可能是比较有效的途径。分析了这次地震的震害分布与场地条件的关系,有迹象表明,大面积的震害分布除了受发震构造不明,小尺度多次破裂过程和震中分散的震群特征的影响外,震区特定的地质构造和花岗岩介质物性对震害分布有很大影响。小范围的震害差异是由于地基土质条件和局部孤突地形的影响。因地基土引起的震害差异可达2度左右,局部孤突地形对震害的影响幅度一般为1度以上。
According to the data of the earthquake damage survey conducted by the Longling earthquake observation field, the characteristics of the earthquake damage distribution in this strong earthquake swarm are discussed. It is considered that the superposition effect of earthquake damage in the same area under multiple strong earthquakes is obvious. It is the total consequence of many earthquakes. It is pointed out that only macroscopically survey methods can only be roughly classified. If we can collocate the microscopic means to set up a series of strong seismograph networks triggered by successive times, observing the earthquake ground motion may be an effective way. The relationship between earthquake damage distribution and site conditions is analyzed. There are some indications that the distribution of large-scale earthquake damage is not only affected by unknown seismogenic structures, multiple-scale small-scale rupture processes and epicenter dispersal characteristics of earthquake swarms, The specific geologic structure of the district and the properties of granite media have a great influence on the distribution of earthquake damage. The small range of seismic damage is due to the influence of the soil conditions and the local lone terrain. The difference of earthquake damage caused by the foundation soil can reach about 2 degrees. The influence range of the local lone terrain on earthquake damage is generally 1 degree or more.