加筋边坡筋材内力的非线性弹性增量分析

发布时间：2018-02-03 05:31

本文关键词： 加筋边坡非线性弹性筋材内力有限元法增量分析变形协调　出处：《长江科学院院报》2017年02期 　论文类型：期刊论文

【摘要】：针对目前工作应力状态下加筋边坡设计方法的不合理性,介绍了一种新的分析计算思路。基于潜在滑裂面处的筋土变形协调和非线性弹性邓肯-张土体本构关系,利用广义胡克定律推导得到非线性弹性增量算法。并通过3个不同倾角的边坡算例,将分析结果与有限元结果进行对比。结果表明:当坡面垂直时,增量算法与有限元解匹配度极高,表明该算法极适合于加筋边坡坡面垂直的情况;当坡面与竖直方向的夹角增大时,增量算法的偏差将逐渐变大,可通过坡面倾角折减系数予以修正。增量算法具备简洁、实用、高效的工程要求特点,具有广阔的应用空间。期望本研究成果能促进筋土相互作用机理清晰化和加筋边坡设计方法合理化。
[Abstract]:Aiming at the irrationality of the design method of reinforced slope under the current working stress state. A new method of analysis and calculation is introduced, which is based on the coordination of the deformation of reinforced soil at the potential slip surface and the constitutive relationship of nonlinear elastic Duncan-Zhang soil. The nonlinear elastic increment algorithm is derived by using generalized Hook's law. Three slope examples with different inclination angles are used to compare the analysis results with the finite element results. The results show that: when the slope surface is vertical. The matching degree between the incremental algorithm and the finite element solution is very high, which indicates that the algorithm is suitable for the vertical slope of reinforced slope. When the angle between the slope and the vertical direction increases, the deviation of the incremental algorithm will gradually become larger, which can be corrected by slope inclination reduction coefficient. The incremental algorithm has the characteristics of simple, practical and efficient engineering requirements. It is expected that the research results will promote the clarity of the mechanism of the reinforced soil interaction and the rationalization of the design method of reinforced slope.
【作者单位】：华中科技大学土木工程与力学学院;
【基金】：国家自然科学基金项目(51379082)
【分类号】：TU43
【正文快照】： 1研究背景人工合成材料是人工合成聚合物的统称,能置于土体中以加强土体稳定性,广泛用于交通、建筑等需要加固土体的工程中。边坡加筋是一种新的边坡加固方式,因其造价经济、安全有效的优良特点,拥有极大的工程应用空间。由于对于筋土相互作用机理研究并不彻底,目前基于极限平

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