摘要
利用自贡地形影响台阵在2008年汶川地震中获得的主震强震记录,采用水平/垂直谱比法(HVSR)对该山脊地形场地对地震动的放大效应进行了分析,并探讨了所获记录结果的可靠性;采用显式有限元-有限差分法结合局部透射人工边界的二维场地影响分析模型与方法,模拟了该场地的地震动响应。对模拟结果与HVSR法分析结果进行对比分析,表明数值模拟结果与观测记录分析结果具有较好的一致性,利用数值计算方法建立的简单二维分析模型基本上可以反映山脊地形对地震动的影响。
Based on strong ground motion accelerations recorded with a topographical effect observation array in Xishan Park of Zigong City for the mainshock of Wenchuan earthquake, 2008, the amplification effects of the mountain ridge topography on the ground motion were studied with the horizontal-to-vertical spectral ratio （HVSR） method, and the reliability of the results was discussed. The strong motion accelerations of the site were also simulated with a two- dimensional site model and analysis method, adopting the explicit finite element-finite deference method and local transmitting boundary. The comparison between the simulated results and those with HVSR method indicated that the simulated results agree well with the observation data, and the simple two-dimensional site model is suitable for simulating the topographical effects on ground motions.
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第8期74-79,共6页
Journal of Vibration and Shock
基金
国家自然科学基金重大研究计划资助项目(90715038)
中国地震局工程力学研究所基本科研业务费专项资助项目(2007B07)
关键词
自贡地形影响台阵
场地效应
水平/垂直谱比法
显式有限元-有限差分方法
局部透射边界
Zigong City topographical effect observation array
site effect
horizontal-to-vertical spectral ratio （HVSR）
explicit finite element-finite deference method
local transmitting boundary
