基于ABAQUS的水闸与地基相互作用分析

发布时间：2018-03-22 08:06

本文选题：水闸底板　切入点：地基接触　出处：《山东大学》2014年硕士论文　论文类型：学位论文

【摘要】：在水闸设计中,与地基基础接触的底板的受力情况是设计人员最为关心的问题之一。尤其对于新型式的水闸结构,有些新型式的水闸的主要特点是：跨度大、水头低、要求设计新颖,构思巧妙、造型独特。但是另一方面,此类水闸结构较为特殊,受力条件较为复杂,按照传统的结构力学方法很难较为合理的对结构进行受力分析,,可以对此类水闸的结构开展三维有限元分析。本文利用ABAQUS有限元软件,结合具体的工程实例,进行三维建模计算,模拟分析了某护镜门型式水闸底板采用闸墩分缝和底板分缝时,对于不同的荷载工况,其相应的受力及变形情况。为工程实际提供设计依据,并对此种类型的水闸的设计具有重要的参考价值。本文主要的研究结果包括以下方面： 1、水闸底板在各种荷载作用下,其变形呈现上游上部顺水流向位移变形,上游下部逆水流向位移变形;下游上部逆水流向位移变形,而下游下部顺水流向位移变形的变化规律,即水闸底板在顺水流向上部处于一个“受挤压”的状态,下部处于一个“受拉伸”的状态。 2、水闸闸室在两种分缝型式下,在竖直向的位移变形量及变形规律差别较大。具体来说,闸墩分缝时,闸室在竖直向位移变形呈现左右对称的规律,这对于闸室的稳定是比较有利的。而底板分缝时,闸室在竖直向位移变形既有左右对称的变化规律,也有正向渐进的变化规律,还有反向渐进的变化规律。反向渐进的变化,指水闸上游沉降较小,而下游沉降较大,这种沉降规律对于闸室的稳定是较为不利的。 3、发现在闸门开启时,水闸的各种内力,均较其他情况下水闸的内力大。所以在实际水闸运行过程中,护镜门型式的水闸,应注意闸门开启时间的控制,不要长时间开启闸门。
[Abstract]:In the design of sluice, the stress condition of the bottom plate in contact with the foundation is one of the most concerned problems for the designer. Especially for the new type of sluice structure, some new types of sluice are characterized by large span and low water head. New design, ingenious conception and unique shape are required. On the other hand, this kind of sluice has a special structure and complex stress conditions. According to the traditional structural mechanics method, it is very difficult to carry on the force analysis to the structure reasonably, can carry on the three-dimensional finite element analysis to the structure of this kind of sluice. In this paper, ABAQUS finite element software is used to simulate and analyze the different load conditions of the bottom slab of a mirror door type sluice when the pier joint and the floor joint are adopted. The corresponding stress and deformation provide the design basis for engineering practice, and have important reference value for the design of this type of sluice. The main results of this paper include the following aspects:. 1. Under all kinds of loads, the bottom plate of sluice sluice presents the displacement deformation of upstream flow direction, upstream bottom flow direction displacement deformation, downstream upstream reverse water flow displacement deformation, downstream upstream reverse water flow direction displacement deformation, and downstream downstream downstream water flow direction displacement deformation. That is, the bottom plate of sluice is in a "squeezed" state in the upper part and a "stretched" state in the lower part. 2. The displacement deformation and deformation law of sluice chamber in vertical direction are different from each other in two types of joint. Specifically, when piers are jointed, the displacement deformation of sluice chamber in vertical direction is symmetrical to the left and right. This is beneficial to the stability of the gate chamber. When the floor joint is divided, the vertical displacement deformation of the gate chamber has both the law of symmetrical variation of left and right, the law of positive progressive change, and the law of reverse gradual change. The upstream settlement of sluice is small, but the downstream settlement is larger, which is unfavorable to the stability of sluice chamber. 3. It is found that when the gate is opened, the internal force of the sluice is greater than that of the sluice under other conditions. Therefore, during the operation of the actual sluice, the control of the opening time of the gate should be paid attention to, and the gate should not be opened for a long time.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV66;TV223

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