自贡西山公园山脊地形的场地效应分析

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (8) : 74-79.

论文

自贡西山公园山脊地形的场地效应分析

唐晖1,2,3; 李小军2; 李亚琦2

作者信息 +

site effect of topograghy on ground motions of xishan park of zigong city

Tang Hui1,2,3, Li xiao-jun2，Li ya-qi2

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文章历史 +

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。

Abstract

Based on the strong motion accelerations recorded by the topographical effect observation array in Xishan park, Zigong city from the mainshock of Wenchuan earthquake, 2008, the site effects of the ridge in the observation array site are studied through Horizontal-to-Vertical Spectral Ratio (HVSR) method, and the reliability of results is discussed. The strong motion accelerations of the observation array site are also simulated by the two-dimensional site model and analysis method, which are based on the explicit finite element-finite deference method and local transmitting boundary. This study indicates that the results of the numerical simulation and the observation data are strong consistent, and the simple two-dimensional site model is suitable for simulating the topographical effects on ground motions.

导出引用

唐晖;;李小军;李亚琦 . 自贡西山公园山脊地形的场地效应分析[J]. 振动与冲击, 2012, 31(8): 74-79

Tang Hui;;Li xiao-jun;Li ya-qi. site effect of topograghy on ground motions of xishan park of zigong city[J]. Journal of Vibration and Shock, 2012, 31(8): 74-79