地震烈度异常研究的若干进展

摘要

首先总结了地震烈度及其异常的特点；其次在分析多个烈度异常区震害资料的基础上,从地形条件、土层特性、断层、土层结构及地下水位等五方面详细分析和总结了烈度异常的形成原因和分布规律；最后从宏观考察、现场测试,强震记录分析,以及数值模拟三方面对烈度异常的研究进展进行了系统总结.总的来说,现阶段对烈度异常现象的研究还不全面,大多是基于宏观震害资料、区域地质构造及局部场地条件等方面的研究,研究成果不能全面充分地解释烈度异常的原因,且对异常现象的定性分析较多,缺少一定的定量分析,特别是缺乏基于强震记录的定量分析.文中对进一步研究烈度异常的形成原因、分布规律及震害影响提出了建议,对下一步开展地震烈度异常方面的研究工作具有重要的参考价值.%This paper firstly summarized the characteristics of seismic intensity and its abnormality.Then,based on the analysis on the damage information of several intensity abnormal regions,the paper made a detailed summary of the abnormal intensity's formation mechanism and distribution rule associated with terrain feature,soil characteristics,faults,soil structure and underground water level.Finally,the paper made a systematical summary on the abnormal intensity research progress from macro-inspection,field testing,seismic record analysis and numerical simulation.In general,at present stage the research on intensity anomaly has not been comprehensive,mostly based on macroscopic seismic damage data,regional geological structure and local site conditions.The research results can not fully explain the causes of abnormal intensity,being mostly qualitative,instead of quantitative,analysis,especially lacking of strong motion record analysis.This paper has put forward a proposal to develop further researeh on the abnormal intensity's formation mechanism,distribution law and damage effect.