2014年“524”、“530”盈江地震中地形及土层条件对房屋震害影响分析  

The effects of topographical and soil conditions on housing damage during the Yingjiang earthquakes

作　　者：迟明杰[1,2] 李小军[1] 陈波[1] 张涛[1,3] 

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]中国地震局地震观测与地球物理成像重点实验室,北京100081 [3]中国地震局搜救中心,北京100049

出　　处：《地震工程与工程振动》2015年第2期94-102,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家国际科技合作项目(2012DFG20510);国家自然科学基金重大研究计划项目(91215301);国家自然科学基金项目(51208234);江苏省科技支撑计划项目(BE2014731)

摘　　要：在历次地震中,地形、地貌及场地条件复杂的山区容易出现房屋建筑震害异常情况。分析震害异常的原因,对于进行建筑抗震设防以减少地震灾害损失具有重要意义。本文主要对2014年盈江524、530两次地震后Ⅷ度区的卡场镇麻竹岭岗房屋破坏及场地条件情况进行调查,根据麻竹岭岗的地形条件由高到低分为3个区,对3个区内的建筑破坏情况进行分析比较,表明震害程度呈现出明显的从山底至山顶逐渐加大的趋势,揭示出显著的山体影响作用。重点对山顶的穿斗木结构破坏情况进行了分析,找出了造成建筑结构破坏的几个不利因素,包括山丘地形顶部放大效应、覆盖土层放大效应以及多次地震震害累积效应。Some abnormal damage appeared due to the complicated mountainous topography and site conditions during earthquake. It is of great significance to analyze the damage factors for seismic fortification of local or similar area, which will reduce the losses caused by earthquake disasters. Based on the on-site investigation, we studied the building damage of Mazhulinggang during Yingjiang earthquakes. According to geographic conditions, the vil- lage was divided into three zones from high to low. It presented the obvious increase trend of earthquake damage gradually from the bottom to the top of the mountain, and showed significant mountain amplification. Several ad- verse factors for building damage to a through type timber frame on the top of the mountain were discussed, inclu- ding the effect of hill terrain amplification, the soil amplification, slope amplification and multiple earthquake accumulative effect.

关 键 词：“524” “530”盈江地震 山体效应 土层效应 震害累积效应 房屋破坏 

分 类 号：P315.91[天文地球—地震学]