背后山古滑坡对汉源老县城震害的影响  

Influence of the Beihoushan Mountain Landslide on the Earthquake Damage of Hanyuan Old County Town

作　　者：刘红帅[1] 王根龙[2] 薄景山[1,3] 刘德东[1] 

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]中国地质调查局西安地质调查中心,陕西西安710054 [3]防灾科技学院,河北三河065201

出　　处：《地震研究》2011年第4期511-517,566,共7页Journal of Seismological Research

基　　金：中国地震局工程力学研究所基本科研业务费--背后山滑坡坡体结构对汉源县城烈度异常的影响(2009B03);国家自然科学基金--汶川特大地震汉源县城地震烈度异常机理研究(50978237);昔格达地层堆积型滑坡体与锚索抗滑桩的地震动接触应力研究(41172293)联合资助

摘　　要：通过对背后山地形地貌、地层岩性、地质构造等进行了野外考察,揭示了背后山发育的古滑坡,圈定了古滑坡周界,分析了汶川地震对背后山古滑坡的影响。利用有限元软件ADINA估算了背后山古滑坡的卓越周期,并与汉源老县城附近的强震记录的卓越周期进行了对比,发现可能出现了共振现象。最后探讨了背后山古滑坡对汉源老县城建筑物震害的影响。A part of old county town of Hanyuan, Shaanxi Province lied on the front accumulation body of the Beihoushan Mountain landslide. A high-intensity abnormality caused by the Ms8.0 Wenchuan earthquake which was about 200 km away appeared there. The geomorphology, strata, type of rock and soil, geologic structures in the Beihoushan Mountain area were investigated. An old landslide in the Beihoushan Mountain was revealed. The boundary of old landslide was delimited. And effects of old landslide on earthquake damage of old Hanyuan County were analyzed. The predominant periods of the Beihoushan Mountain landslide were estimated using ADINA. The predominant periods of strong ground motion records near old Hanyuan County were close to those of the old landslide, which induced resonance effect to aggravate the earthquake damage of buildings lying on the front accumulation body of the Beihoushan Mountain landslide.

关 键 词：背后山古滑坡 震害调查 卓越周期 汉源老县城 

分 类 号：P315.9[天文地球—地震学]