汶川地区含软弱层岩质边坡地震响应研究

汶川地震中含软弱层顺层岩质边坡破坏严重。为探究其地震响应情况，以大光包滑坡为工程背景，运用FLAC3D建立一含软弱层边坡模型，按不同工况加载，研究边坡响应规律。结果表明:边坡响应剧烈程度与地震波幅值具有正相关关系，与软弱层强度反相关；波形对边坡响应影响具有重要作用，需要区别对待；软弱层存在增大了边坡响应，增加了地震作用下边坡破坏的风险，是岩质边坡地震稳定性评价中重要因素。

Research on Seismic Response of Rock Slope with Weak Layer in Wenchuan Region

The bedding rocky slope containing weak layer was damaged seriously in Wenchuan Earthquake. In order to explore its seismic response, DAGUANGBAO Landslide was taken as the engineering background herein, and a model for slope containing weak layer was established by use of FLAC3D to study the rules of slope response by loading different working conditions. The result shows that, the severity of slope response relates to the amplitude of seismic wave in positive correlation, and to the strength of weak layer in negative correlation; the wave form plays an important role in the response of the slope and requires to be treated differently; the weak layer, whose existence may lead to enlarged slope response and aggravated risk of slope failure under seismic load, is the important factor to evaluate the seismic stability of rock slope.