基于微分层平衡挡土墙土压力曲线分布计算理论研究的谬误

发布时间：2018-01-02 15:23

  本文关键词：基于微分层平衡挡土墙土压力曲线分布计算理论研究的谬误　出处：《土木工程学报》2017年05期 　论文类型：期刊论文

  更多相关文章： 土压力 挡土墙 微分层 土拱 力矩平衡 有限元

【摘要】：微分层平衡是近50年国内外挡土墙土压力曲线分布计算理论研究方法的基础,其侧土压力系数假定方法虽然各不相同但随墙面摩擦角变化规律都与库仑土压力系数悖逆却是共性,推导过程假设计算的侧土压力系数与结论合力土压力系数是仅有定义概念差别的同一物理量却自相矛盾。根据微分层平衡所得土压力分布计算公式数学原理,揭示了只要采用此方法得出土压力为曲线分布的研究成果,必然是假设与结论侧土压力系数自相矛盾并悖逆经典理论的谬论。依该文提出的非极限状态土压力研究方法,有限元模拟计算揭示的变形应力成果,表明挡土墙实际的土压力分布曲线特别是墙底段和铅直土压力根本不同于微分层理论计算结果,进一步阐明了微分层平衡模型不能用于考虑墙面摩擦的挡土墙土压力曲线分布研究,否则假设与结论的自相矛盾、墙底段土压力分布的严重失真而成为谬论,是微分层平衡数学原理和力学模型简化的内在本质必然。
[Abstract]:Differential layer balance is the basis for nearly 50 years at home and abroad for retaining wall soil pressure distribution curve on the theoretical calculation method, the lateral earth pressure coefficient method assumes that although different but the regularity of wall friction angle changes and Coulomb earth pressure coefficient is rebellious in common, the derivation process of computation of lateral earth pressure coefficient and the conclusion force of soil the pressure coefficient is the same physical quantity only defines the concept of difference was contradictory. According to the balance of income differential layer distribution of the earth pressure calculation formula of mathematical principle, as long as it reveals the research results for earth pressure distribution curve by this method is the inevitable conclusion hypothesis and the lateral earth pressure coefficient and the classical theory of contradictory rebellious fallacy. According to the research method non limit earth pressure is proposed in this paper, revealing the deformation finite element simulation results show that the stress and pressure of a retaining wall the actual distribution curve of special Is the bottom of the wall section and the vertical earth pressure differential layer is fundamentally different from the theoretical results, and further clarified the differential equilibrium layer model cannot be used in the study of earth pressure distribution curve considering retaining wall wall friction, or the hypothesis and contradictory conclusions, the bottom of the wall section of the distribution of earth pressure serious distortion and become a fallacy, is intrinsic to simplify layer the balance principle of mathematics and mechanics model of differential inevitable.

【作者单位】： 太原理工大学;
【分类号】：TU476.4
【正文快照】： 引言 挡土墙土压力曲线分布微分层平衡模型研究方法,由苏联学者卡岗(М.Е.Каган)1960年提出,1964年蒋莼秋给出考虑墙面及填土表面倾角的曲线分布计算公式[1],2001年顾慰慈编入《挡土墙土压力计算》及《挡土墙土压力计算手册》水平层分析法[1-4];1985年Handy用于主应力，

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