强震区岩体地震动力破坏特征  

Characteristics of Rock Mass Failure under Seismic Loads at Strong Earthquake Areas

作　　者：梁庆国[1] 韩文峰[2] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]天津城市建设学院土木工程系,天津300381

出　　处：《西北地震学报》2009年第1期15-20,共6页Northwestern Seismological Journal

基　　金：兰州交通大学"青蓝工程"资助项目;科技部社会公益研究专项(2002DIB20062)

摘　　要：岩体的地震动力破坏是岩体动力学的重要组成部分,但研究较少。本文分析了缺乏研究的原因;将岩体地震动力破坏划分为6种形式即:滑坡、崩塌、剥落、塌陷、地裂缝和岩体松动,其中岩体松动是震后产生次生地质灾害的重要原因;按照动力作用方式、岩体地震动力破坏的应力状态和破坏机制对岩体地震动力破坏进行分类,并探讨了地震滑坡和非地震滑坡的区别;讨论了岩体地震动力破坏的5个特点:不均匀性、重复性、丛集性、结构控制性和广泛性。As an important part of rock mass dynamics, the seismic dynamic failure of rock mass was short of study before. In this paper, the reason of this short is analyzed first. The seismic dynamic failure of rock mass is classified into 6 types of forms： landslide, rock avalanche, spalling, collapse, ground fissure and rock mass dynam-relaxation, among them the rock mass dy- nam-relaxation is an important factor for causing a lot of secondary geological hazards. According to the action manner of seismic dynamic loads, stress state and failure mechanism, the rock mass seismic dynamic failure is further divided, the earthquake landslide and non-earthquake landslide are differentiated. At last, the characteristics of the failure are discussed from its inhomogeneity, repeated failure, clustering, controlling by discontinuities, and universality.

关 键 词：岩体力学 强震区 地震动力破坏 岩体松动 

分 类 号：TU457[建筑科学—岩土工程] P315.9[建筑科学—土工工程]