本文選題：超長混凝土矩形水池結(jié)構(gòu) + 溫度效應(yīng)　； 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：隨著當(dāng)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(yīng)的擴(kuò)大。一般的大型貯水池為了控制溫度裂縫問題,多采取設(shè)置伸縮縫來釋放出溫度應(yīng)力,然而大量的實(shí)踐表明,設(shè)縫后的水池不一定能完全避免開裂,同時(shí)這種分塊結(jié)構(gòu)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(shè)縫結(jié)構(gòu)的方向發(fā)展,超長混凝土水池體系應(yīng)運(yùn)而生。對(duì)于超長混凝土水池結(jié)構(gòu),溫度應(yīng)力是必須考慮的重要因素,這也是引起結(jié)構(gòu)溫度裂縫的主要原因。所以研究超長混凝土水池結(jié)構(gòu)的溫度效應(yīng)問題以及溫度內(nèi)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(duì)超長混凝土矩形水池進(jìn)行溫度效應(yīng)分析,其目的是研究溫度收縮這類非荷載因素對(duì)結(jié)構(gòu)的影響,同時(shí)分析增設(shè)膨脹加強(qiáng)帶、滑動(dòng)層等溫度內(nèi)力控制方法,其具體研究內(nèi)容如下:1.分析了超長混凝土結(jié)構(gòu)溫度裂縫的成因及影響因素,同時(shí)介紹了溫度應(yīng)力的基本理論,討論了多種溫度荷載的分類以及計(jì)算方法,討論了季節(jié)溫差和收縮當(dāng)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(jié)構(gòu)在未采用任何抗裂措施時(shí)的有限元模型,對(duì)該結(jié)構(gòu)在最不利溫度荷載工況下總結(jié)柱、梁、頂板和池壁的變形規(guī)律和內(nèi)力規(guī)律;3.利用MIDAS/Gen分別建立增設(shè)膨脹加強(qiáng)帶和增設(shè)滑動(dòng)層的超長混凝土矩形水池結(jié)構(gòu)的有限元模型,分析了其采用不同參數(shù)時(shí)該水池結(jié)構(gòu)的溫度效應(yīng),并與不采用任何抗裂措施的水池結(jié)構(gòu)的溫度效應(yīng)進(jìn)行對(duì)比,分析出膨脹加強(qiáng)帶和滑動(dòng)層對(duì)控制超長混凝土水池結(jié)構(gòu)溫度收縮應(yīng)力的有效性和實(shí)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(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU37

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本文編號(hào)：1940926