船闸高衬砌闸室结构计算分析
发布时间：2018-08-10 22:15
【摘要】：衬砌式闸墙是一种经济、适应的的结构型式，其应用十分广泛。在工程设计中，衬砌式闸墙结构的计算方法主要是采用基于材料力学基本假定的解析法，但其计算结果很难反映岩体与衬砌墙之间的相互作用以及结构发生应力集中时其值的大小和位置。而这往往是结构产生裂缝甚至破坏的主要原因。因此，对衬砌式闸墙结构进行全面的内力分析和研究，采用合理方法分析计算，对船闸结构优化设计和保障其运行安全具有重要意义。 本文主要采用解析法(材料力学简化计算法)和ANSYS有限元仿真计算法，分别对衬砌式闸墙结构进行计算，主要内容如下： 1、通过对国内外船闸相关文献的收集与阅读，了解了目前国内外船闸结构的研究及发展现状。并根据衬砌式闸墙结构特点，评述了现有计算方法的优缺点。 2、针对依托工程，采用解析法、有限元法计算结果与原型观测数据对比分析得出，解析法在闸墙内力计算、确定结构应力集中的位置及其结构位移等方面存在局限性，较难反映衬砌式闸墙结构与岩体的相互作用，且部分结构应力、应变计算结果与实际情况有一定差异。 3、有限元法的计算结果较接近原型观测数据，并且能真实的反映出衬砌式闸墙结构内部危险的位置及其应力值，以及衬砌式闸墙结构的受力状态。 4、衬砌式闸墙结构的三维非线性有限元计算结果表明，在完建、低水运行、检修下，衬砌式闸墙顶部都有向内侧的变形趋势，而底部有向外的变形趋势。 5、衬砌墙第一及第三主拉应力显示，拉应力均出现在各台阶截面形式改变处，其中检修工况下应力值最大；从等效应力分布看出，衬砌闸墙前趾处更容易屈服。因此，衬砌墙的危险位置为各台阶截面形式改变处及衬砌墙前趾位置。 6、通过对衬砌墙各阶梯上的接触压应力和接触切应力计算得知，台阶上基岩和闸墙的接触压应力多呈抛物线型分布，，与传统解析法采用的线性假设有很大差异；而竖墙和台阶上的接触应力分布几种工况相差不大，均为顶部和底部较大，中部较小的分布形式。
[Abstract]:Lining sluice wall is an economical and suitable type of structure, which is widely used. In the engineering design, the calculation method of lining type gate wall structure is mainly based on the analytical method based on the basic assumptions of material mechanics. However, the calculated results can hardly reflect the interaction between the rock mass and the lining wall and the magnitude and position of the value when the stress concentration occurs in the structure. This is often the main cause of cracks and even damage to the structure. Therefore, it is of great significance to optimize the design of lock structure and ensure its operation safety by using reasonable method to analyze and study the internal force of lining type lock wall structure. In this paper, analytical method (simplified calculation method of mechanics of materials) and ANSYS finite element simulation method are used to calculate the lining type gate wall structure, respectively. The main contents are as follows: 1. Through the collection and reading of the relevant documents of lock at home and abroad, the research and development status of lock structure at home and abroad are understood. According to the structural characteristics of lining sluice wall, the advantages and disadvantages of the existing calculation methods are reviewed. 2. According to the supporting engineering, the analytical method, the finite element method and the prototype observation data are compared and analyzed. The analytical method has some limitations in calculating the internal force of the sluice wall, determining the position of the stress concentration of the structure and the displacement of the structure, so it is difficult to reflect the interaction between the lining type gate wall structure and the rock mass, and part of the structural stress. The result of strain calculation is different from the actual situation. 3. The results of finite element method are close to the prototype observation data, and can truly reflect the dangerous position and stress value of lining type sluice wall structure. 4. Three-dimensional nonlinear finite element calculation results of lining type gate wall structure show that the top of lining type gate wall has the tendency of inner deformation under the condition of finished construction, low water operation and overhaul. 5. The first and third main tensile stresses of the lining wall show that the tensile stress appears at the change of the cross section of each step, among which the stress value is the largest under the condition of maintenance, and the equivalent stress distribution shows that, The front toe of the lining gate wall is more prone to yield. Therefore, the dangerous position of lining wall is the change of step cross section and the position of front toe of lining wall. 6. Through the calculation of contact compressive stress and contact shear stress on each step of lining wall, The contact compressive stresses of bedrock and gate wall on the steps are parabolic, which is very different from the linear assumption used by the traditional analytical method, but the distribution of contact stress on the vertical wall and the step is not different in several conditions, which is the top and the bottom. A small form of distribution in the middle.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U641.31
本文编号：2176367
[Abstract]:Lining sluice wall is an economical and suitable type of structure, which is widely used. In the engineering design, the calculation method of lining type gate wall structure is mainly based on the analytical method based on the basic assumptions of material mechanics. However, the calculated results can hardly reflect the interaction between the rock mass and the lining wall and the magnitude and position of the value when the stress concentration occurs in the structure. This is often the main cause of cracks and even damage to the structure. Therefore, it is of great significance to optimize the design of lock structure and ensure its operation safety by using reasonable method to analyze and study the internal force of lining type lock wall structure. In this paper, analytical method (simplified calculation method of mechanics of materials) and ANSYS finite element simulation method are used to calculate the lining type gate wall structure, respectively. The main contents are as follows: 1. Through the collection and reading of the relevant documents of lock at home and abroad, the research and development status of lock structure at home and abroad are understood. According to the structural characteristics of lining sluice wall, the advantages and disadvantages of the existing calculation methods are reviewed. 2. According to the supporting engineering, the analytical method, the finite element method and the prototype observation data are compared and analyzed. The analytical method has some limitations in calculating the internal force of the sluice wall, determining the position of the stress concentration of the structure and the displacement of the structure, so it is difficult to reflect the interaction between the lining type gate wall structure and the rock mass, and part of the structural stress. The result of strain calculation is different from the actual situation. 3. The results of finite element method are close to the prototype observation data, and can truly reflect the dangerous position and stress value of lining type sluice wall structure. 4. Three-dimensional nonlinear finite element calculation results of lining type gate wall structure show that the top of lining type gate wall has the tendency of inner deformation under the condition of finished construction, low water operation and overhaul. 5. The first and third main tensile stresses of the lining wall show that the tensile stress appears at the change of the cross section of each step, among which the stress value is the largest under the condition of maintenance, and the equivalent stress distribution shows that, The front toe of the lining gate wall is more prone to yield. Therefore, the dangerous position of lining wall is the change of step cross section and the position of front toe of lining wall. 6. Through the calculation of contact compressive stress and contact shear stress on each step of lining wall, The contact compressive stresses of bedrock and gate wall on the steps are parabolic, which is very different from the linear assumption used by the traditional analytical method, but the distribution of contact stress on the vertical wall and the step is not different in several conditions, which is the top and the bottom. A small form of distribution in the middle.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U641.31
【参考文献】
相关期刊论文 前10条
1 徐平,甘军,丁秀丽;三峡工程船闸高边坡岩体长期变形及稳定性有限元分析[J];长江科学院院报;1999年02期
2 吕洪根;坞式闸首底板计算方法的分析[J];重庆交通学院学报;1989年01期
3 苏继宏,汪正兴,任文敏,杨振宇,周军生;岩土材料破坏准则研究及其应用[J];工程力学;2003年03期
4 徐健鹏,蒋志;整体式船闸结构计算程序[J];广东水利水电;2001年03期
5 王开云,何江达,梁照江,许有飞;有限元法建立船闸闸室墙计算模型[J];红水河;2004年04期
6 许有飞,何江达,梁照江,王开云,李莉,陈作强;混合式闸墙与基岩间的非线性接触分析[J];红水河;2004年04期
7 陕亮;徐跃之;肖汉江;;三峡永久船闸混合式闸室墙接触问题数值分析[J];南水北调与水利科技;2008年02期
8 蔡志长;孙忠祖;詹世富;梁开华;;船闸闸首结构三维有限元计算分析[J];江苏水利;1986年01期
9 杨斌;朱旭;;船闸闸首非线性有限元计算分析[J];水道港口;2010年05期
10 汪基伟;船闸裂缝成因及加固措施的研究[J];水利水电技术;2001年09期
本文编号：2176367
本文链接：https://www.wllwen.com/kejilunwen/jiaotonggongchenglunwen/2176367.html
