岷县漳县6.6级地震震害特征及其启示

Earthquake Damage Characteristics of the Minxian-Zhangxian M_S6.6 Earthquake and Its Lessons

摘要:

通过对2013年7月22日甘肃岷县漳县6.6级地震的发震构造、房屋和生命线工程震害、次生地质灾害的现场科学考察,系统介绍了本次地震发震构造、宏观地震烈度分布特征、不同烈度区房屋震害特点及破坏机制,并对地震中突出的黄土滑坡震害开展了深入的分析,进而总结归纳了此次地震中的断层效应、山体放大作用和边坡效应等震害特征。在此基础上提出了针对灾区灾后重建和今后我国的抗震设防工作的几点启示。

Abstract:

According to scientific investigation of the seismogenic structure,housing and the lifeline engineering damages and the secondary geological disasters induced by the Minxian-Zhangxian MS6.6 earthquake on July 22,2013,that the characteristics of seismogenic structure and seismic intensity distribution,damage characteristics and failure mechanism of houses in different intensity zones are introduced.Moreover,a thorough analysis of typical loess landslides are carried out,the damage characteristics of fault effects,amplification effects of mountain and slope effects are summarized as well.Based on the in-depth investigation of seismogenic structure,site conditions of the quake-hit areas,different houses damages and secondary geological disasters,some lessons have been proposed for reconstruction of the quake and seismic fortification in the future.