【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。更多还原

【Abstract】 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.更多还原