摘要
为探索岩质边坡在地震荷载作用下的动力响应问题,运用3DEC离散元软件,定量分析了地震荷载作用下岩质边坡结构面发育位置、结构面数量、以及结构面间距对边坡加速度放大系数的影响规律。结果表明:在单条结构面的情况下,其发育位置对岩质边坡加速度响应的影响比较明显,结构面距坡面越近,加速度峰值放大系数越大;随着结构面数量的增多,加速度峰值放大系数呈现出明显的递减趋势;在结构面数量一定的情况下,结构面间距的变化对加速度峰值放大系数的影响不大。研究结果有助于进一步揭示岩质边坡在地震作用下的动力响应规律。
The influence of position of structure interface development, numbers of structural interfaces, spacing of structural interfaces on acceleration amplification coefficients of rock slope under earthquake is explored by using the software of 3DEC. It is shown that in the case of single structural interface, the influence of its develop position on acceleration response of the rock slope is obvious. The closer the structure interface is to slope surface, the greater the amplification coefficients of PGA is. It is also in-dicated that the amplification coefficient of PGA showing a significant decreasing trend with increase of the numbers of structure interface ; in the case of a certain number of structural interfaces, spacing variation of structural interface has slight influence on the amplification coefficient of PGA. The study results are helpful to further researches on dynamic response laws of rock slope under earthquakes response.
出处
《人民长江》
北大核心
2013年第3期40-43,共4页
Yangtze River
基金
国家自然科学基金青年科学基金项目(41102195)
中央高校基本科研业务费专项资金资助项目(CUGL100234)
关键词
岩质边坡
动力响应
结构面
放大系数
3DEC
rock slope
dynamic response
structural interface
amplification coefficient
3DEC
