汶川特大地震之北川县城震害分析  

Analysis on Seismic Hazards in Beichuan County Town Caused by Wenchuan Great Earthquake

作　　者：王根龙[1] 刘红帅[2] 张军慧[1] 

机构地区：[1]中国地震局防灾科技学院防灾工程系,河北三河065201 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《西北地震学报》2010年第2期173-178,共6页Northwestern Seismological Journal

基　　金：防灾减灾青年科技基金项目(2008A10);国家自然科学基金项目(40702055)

摘　　要：2008年5月12日汶川8.0级地震在北川县城造成了巨大的破坏,导致上万人死亡,整个北川县城变为废墟。现场地震科考分析显示,造成北川县城建筑物和道路严重损毁以及人员重大伤亡的三个主要原因为:活断层错动产生的地表破裂效应,地震引发的次生地质灾害(崩塌、滑坡)和强地震动产生的振动破坏效应。北川县城主断裂和次级断裂沿线分布的建筑物震害较重,而邻近断裂的建筑物震害相对较轻;地震触发的王家岩滑坡和景家山崩塌对北川县城造成了极大的破坏,导致2000余人死亡;而振动破坏效应在北川县城普遍存在,它产生的水平剪切运动对建筑物的危害很严重。MS 8.0 Wenchuan earthquake on May 12,2008 caused Beichuan county massive damage,and resulted in more than ten thousands deaths.The whole Beichuan county town has become ruin.Based on the field seismic investigation,three principal causes of building and road＇s serious damage as well as personnel heavy casualties are given：the ground surface rupture effect caused by seismo-active fault movement,the secondary geological hazards （collapse and landslide） and the vibration failure effect caused by strong ground motion.Damage of buildings along the main fault and secondary faults were more serious,but destruction in adjacent buildings is relatively not severe.The Wangjiayan landslide and Jingjiashan collapse brought about huge damage to the Beichuan county town and led to more than 2000 people death.The effects of vibration failure were ubiquitous for all buildings,especially horizontal shear movement generated serious constructional damage.

关 键 词：汶川特大地震 北川县城 断层错动效应 次生地质灾害 振动破坏效应 震害分析 

分 类 号：P315.9[天文地球—地震学]