Abstract：In the high earthquake region of intensity VIII，dangerous rock mass slope of Xichongte bridge pier #16 at YK136＋097 along Ya?an—Lugu highway is selected as studying objects. The geology-dynamics model of dangerous rock bodies is constructed from steep structural plane tilting to the outside slope and weathering- unloading fracture. Monitoring points are placed at important places of slope body and bridge pier. Using the numerical analysis method of discontinuous deformation，the instability model，failure scale，motion trajectory of dangerous rock masses and their impact dynamic response characteristics on bridge pier are simulated. Evolution process is presented as follows：Under intense earthquake，horizontal earthquake force causes enlargement effect，which results in earthquake collapse and ejection of the rock masses at salient position at first. Next，shattering-sliding and disintegrating of the rock masses happens along unloading tension fracture surfaces in the middle of slope. At last，the whole landslide body slumps along controlling structural plane and impacts bridge pier. Statistical analysis of displacement and deformation feature of all monitoring points at slope body and bridge pier shows that the displacement from all monitoring points is positively correlated with earthquake rhythm. Under the influence of the impacting of instability rock and the pushing of accumulation rock，the deformation and permanent displacement of beam and the top of pier are larger than that at other positions，which is the same as phenomenon of bridge failure during “5•12” Wenchuan earthquake. Based on the quantitative analysis of deformation of slope and pier，according to the collapse features induced by intense earthquake，prevention and treatment measurement are put forward for the dangerous rock mass of bridge slope.
裴向军，黄润秋，李世贵. 强震崩塌岩体冲击桥墩动力响应研究[J]. 岩石力学与工程学报, 2011, 30(S2): 3995-4001.
PEI Xiangjun，HUANG Runqiu，LI Shigui. STUDY OF DYNAMIC RESPONSE OF BRIDGE PIER SHOCKED BY FALLING ROCK INDUCED BY INTENSIVE EARTHQUAKE. , 2011, 30(S2): 3995-4001.
殷跃平. 汶川八级地震滑坡特征分析[J]. 工程地质学报，2009，17(1)：29-38.(YIN Yueping. Features of landslides triggered by the Wenchuan earthquake[J]. Journal of Engineering Geology，2009，17(1)：29-38.(in Chinese))
[8]
黄润秋，裴向军，李天斌. 汶川地震触发大光包巨型滑坡基本特征及形成机制分析[J]. 工程地质学报，2008，16(6)：730-741. (HUANG Runqiu，PEI Xiangjun，LI Tianbin. Basic characteristics and formation mechanism of the largest scale landslide at Daguangbao occurred during the Wenchuan earthquake[J]. Journal of Engineering Geology，2008，16(6)：730-741.(in Chinese))
[2]
殷跃平. 汶川八级地震地质灾害研究[J]. 工程地质学报，2008，16(4)：433-444.(YIN Yueping. Research on the geohazards triggered by the Wenchuan earthquake[J]. Journal of Engineering Geology，2008，16(4)：433-444.(in Chinese))
[1]
许 强，黄润秋. 5•12汶川大地震诱发大型崩滑灾害动力特征初探[J]. 工程地质学报，2008，16(6)：721-729.(XU Qiang，HUANG Runqiu. Kinetics charateristics of large landlides triggered by May 12th Wenchuan earthquake[J]. Journal of Engineering Geology，2008，16(6)：721-729.(in Chinese))
[4]
黄润秋. 汶川8.0级地震触发崩滑灾害机制及其地质力学模式[J]. 岩石力学与工程学报，2009，28(6)：1 239-1 249.(HUANG Runqiu. Mechanism and geomechanical modes of landslide hazards triggered by Wenchuan 8.0 earthquake[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(6)：1 239-1 249.(in Chinese))
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2011, Vol. 30 
