超长混凝土矩形水池的温度效应分析

发布时间：2018-05-27 06:47

本文选题：超长混凝土矩形水池结构 + 温度效应　；参考：《西南交通大学》2017年硕士论文

【摘要】：随着当今都市规模的飞快发展,越来越多的市政贮水建筑物的规模也相应的扩大。一般的大型贮水池为了控制温度裂缝问题,多采取设置伸缩缝来释放出温度应力,然而大量的实践表明,设缝后的水池不一定能完全避免开裂,同时这种分块结构也存在着整体性差、抗震性差、耐久性差等一系列的问题,所以越来越多的贮水建筑物向整体不设缝结构的方向发展,超长混凝土水池体系应运而生。对于超长混凝土水池结构,温度应力是必须考虑的重要因素,这也是引起结构温度裂缝的主要原因。所以研究超长混凝土水池结构的温度效应问题以及温度内力的有效控制方法具有十分重要的意义。本文主要利用有限元软件MIDAS/Gen对超长混凝土矩形水池进行温度效应分析,其目的是研究温度收缩这类非荷载因素对结构的影响,同时分析增设膨胀加强带、滑动层等温度内力控制方法,其具体研究内容如下:1.分析了超长混凝土结构温度裂缝的成因及影响因素,同时介绍了温度应力的基本理论,讨论了多种温度荷载的分类以及计算方法,讨论了季节温差和收缩当量温差的影响因素和取值;2.利用MIDAS/Gen建立某超长混凝土矩形水池结构在未采用任何抗裂措施时的有限元模型,对该结构在最不利温度荷载工况下总结柱、梁、顶板和池壁的变形规律和内力规律;3.利用MIDAS/Gen分别建立增设膨胀加强带和增设滑动层的超长混凝土矩形水池结构的有限元模型,分析了其采用不同参数时该水池结构的温度效应,并与不采用任何抗裂措施的水池结构的温度效应进行对比,分析出膨胀加强带和滑动层对控制超长混凝土水池结构温度收缩应力的有效性和实用性。
[Abstract]:With the rapid development of urban scale, more and more municipal water storage structures are expanding accordingly. In order to control the problem of temperature crack, the common large storage tank usually adopts the expansion joint to release the temperature stress. However, a lot of practice shows that the pool after the joint is not always able to avoid cracking completely. At the same time, the block structure also has a series of problems, such as poor integrity, poor seismic performance, poor durability and so on. Therefore, more and more water storage structures develop to the direction of integral non-jointed structure, and the super-long concrete pool system emerges as the times require. The temperature stress is an important factor which must be considered in the structure of super long concrete pool, which is also the main cause of the temperature crack of the structure. Therefore, it is of great significance to study the temperature effect of super long concrete pool structure and the effective control method of temperature internal force. In this paper, the finite element software MIDAS/Gen is used to analyze the temperature effect of extra-long concrete rectangular tank. The purpose of this paper is to study the influence of non-load factors such as temperature shrinkage on the structure, and to analyze the addition of expansion strengthening band. The internal force control method of sliding layer isotherm temperature, the specific research contents are as follows: 1. The causes and influencing factors of temperature cracks in super-long concrete structures are analyzed. At the same time, the basic theory of temperature stress is introduced, and the classification and calculation methods of various temperature loads are discussed. The influence factors and values of seasonal temperature difference and shrinkage equivalent temperature difference are discussed. The finite element model of a super long concrete rectangular tank structure without any crack resistance is established by using MIDAS/Gen. The deformation and internal force laws of column, beam, roof and wall of the structure under the most unfavorable temperature load are summarized. The finite element model of extra-long concrete rectangular pool structure with expansion strengthening band and sliding layer is established by MIDAS/Gen, and the temperature effect of the tank structure with different parameters is analyzed. Compared with the temperature effect of the tank structure without any anti-cracking measures, the effectiveness and practicability of the expansion strengthening zone and sliding layer in controlling the temperature shrinkage stress of the super-long concrete pool structure are analyzed.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU37

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