摘要
地震作用下,坡面形态对岩质边坡的变形破坏过程存在一定影响。文中以汶川地区公路沿线具有典型坡面形态的顺层岩质边坡为例,采用离散元UDEC软件,模拟4种坡面形态下边坡的变形破坏过程,并监测坡体关键位置处的位移和坡体应力场。通过模拟结果,对比分析不同坡型边坡变形破坏的动力响应时间、边坡的破坏位置,以及边坡破坏的程度和模式,总结出地震作用下该类顺层岩质边坡变形破坏的坡面效应,最后通过应力场分析引起坡面效应的原因。
Topography have some effects on the deformation and failuar of the bedding rock slope un- der earthquake. The distinct elements software UDEC are used to simulate deformation and failure of four kinds of slope which is based on the highway in Wenchuan area, and to monitor the displacement of critical position on the slope and stress field of the slope. Through simulation results, the different dynamic re- sponse time of the deformation and failure , the damage location, and the extent and mode of failure of the four types of slope can be comparatively analyzed. With the analysis, topography effects on deformation and failure of the class bedding rock slope under earthquak can be summed up. Stress analysis of slope has been carried out to find out the reason of topography effects.
出处
《公路》
北大核心
2012年第8期12-16,共5页
Highway
基金
国家自然科学基金项目
项目编号40972195
西部交通建设科技项目
项目编号2009318000095
关键词
地震作用
顺层岩质边坡
离散元
坡面效应
earthquake~ bedding rock slope
distinct elements
topography effects
