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  本文選題：超長混凝土矩形水池結構 + 溫度效應��； 參考：《西南交通大學》2017年碩士論文

【摘要】：隨著當今都市規(guī)模的飛快發(fā)展,越來越多的市政貯水建筑物的規(guī)模也相應的擴大。一般的大型貯水池為了控制溫度裂縫問題,多采取設置伸縮縫來釋放出溫度應力,然而大量的實踐表明,設縫后的水池不一定能完全避免開裂,同時這種分塊結構也存在著整體性差、抗震性差、耐久性差等一系列的問題,所以越來越多的貯水建筑物向整體不設縫結構的方向發(fā)展,超長混凝土水池體系應運而生。對于超長混凝土水池結構,溫度應力是必須考慮的重要因素,這也是引起結構溫度裂縫的主要原因。所以研究超長混凝土水池結構的溫度效應問題以及溫度內力的有效控制方法具有十分重要的意義。本文主要利用有限元軟件MIDAS/Gen對超長混凝土矩形水池進行溫度效應分析,其目的是研究溫度收縮這類非荷載因素對結構的影響,同時分析增設膨脹加強帶、滑動層等溫度內力控制方法,其具體研究內容如下:1.分析了超長混凝土結構溫度裂縫的成因及影響因素,同時介紹了溫度應力的基本理論,討論了多種溫度荷載的分類以及計算方法,討論了季節(jié)溫差和收縮當量溫差的影響因素和取值;2.利用MIDAS/Gen建立某超長混凝土矩形水池結構在未采用任何抗裂措施時的有限元模型,對該結構在最不利溫度荷載工況下總結柱、梁、頂板和池壁的變形規(guī)律和內力規(guī)律;3.利用MIDAS/Gen分別建立增設膨脹加強帶和增設滑動層的超長混凝土矩形水池結構的有限元模型,分析了其采用不同參數(shù)時該水池結構的溫度效應,并與不采用任何抗裂措施的水池結構的溫度效應進行對比,分析出膨脹加強帶和滑動層對控制超長混凝土水池結構溫度收縮應力的有效性和實用性。
[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.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU37

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本文編號：1940926