本文選題：圓筒式調(diào)壓井 + 有限元法��； 參考：《昆明理工大學》2015年碩士論文

【摘要】：隨著我國對用電量的需求越來越大,越來越多的水電站在修建。調(diào)壓井在保障水電站的正常運行起著非常重要的作用,它的發(fā)展也越來越快。調(diào)壓井目前的發(fā)展趨勢表現(xiàn)為：直徑越來越大,布置和結構形式也越來越多種多樣。傳統(tǒng)的調(diào)壓井分析方法一一薄壁圓柱筒法,只能分析小型調(diào)壓井；而對于大直徑調(diào)壓井,若僅采用傳統(tǒng)結構力學方法進行調(diào)壓井設計和計算,其結果往往與設計要求偏差較大。有限單元法被廣泛運用于實際工程,可引入有限單元法求解大直徑調(diào)壓井。本文主要研究內(nèi)容有以下幾條：1、對調(diào)壓井功能和結構構造進行基本介紹；以及調(diào)壓井的兩種分析方法：薄壁圓柱筒法與有限元法；闡述了調(diào)壓井主要材料一一混凝土的本構關系、屈服準則及破壞準則等。2、選用三分點加載試驗梁,運用William-Warnke五參數(shù)破壞準則對梁進行數(shù)值模擬分析。通過對數(shù)值仿真得出的極限荷載、撓度與荷載關系曲線和實驗結果相比較,兩者結果較為吻合,可見William-Warnke五參數(shù)破壞準則能夠模擬混凝土這種材料力學行為。3、運用有限單元法,選取某一圓筒式調(diào)壓井進行數(shù)值模擬分析。主要分析①襯砌單獨工作時,襯砌出現(xiàn)裂縫時的水位以及襯砌所能承受的極限水位。②考慮襯砌和圍巖共同作用時,為保證襯砌不出現(xiàn)裂縫時圍巖彈性模量的取值范圍。③圍巖彈性模量為某一定值時襯砌的工作狀態(tài)。④不同水位、不同圍巖彈性模量時襯砌裂縫發(fā)展情況,應力以及位移的變化情況。
[Abstract]:With the increasing demand for electricity consumption in China, more and more hydropower stations are being built. Surge well plays a very important role in ensuring the normal operation of hydropower station, and its development is getting faster and faster. The development trend of surge wells is as follows: the diameter is getting larger and larger, and the layout and structure are more and more diverse. The traditional analysis method of regulating wells, thin-walled cylindrical tube method, can only analyze small ones, but for large diameter surge wells, if only the traditional structural mechanics method is used to design and calculate the surge wells, the results often deviate greatly from the design requirements. Finite element method (FEM) is widely used in practical engineering. The main contents of this paper are as follows: 1. The basic introduction of the function and structure of the surge well, and the two analytical methods of the well: the thin-walled cylinder method and the finite element method. The constitutive relation, yield criterion and failure criterion of concrete, the main material of the surge well, are expounded. The three-point loading test beam is selected and the William-Warnke five-parameter failure criterion is used to simulate the beam. The numerical simulation results of ultimate load, deflection and load relation curve are in good agreement with the experimental results. It can be seen that the William-Warnke five-parameter failure criterion can simulate the mechanical behavior of concrete of this material by using finite element method. A cylinder type pressure regulating well is selected for numerical simulation and analysis. This paper mainly analyzes the water level when the lining appears cracks and the limit water level that the lining can bear when the lining works alone, when the joint action of the lining and the surrounding rock is taken into account. In order to ensure the value range of elastic modulus of surrounding rock when the lining does not appear crack, .3 the elastic modulus of surrounding rock is the working state of lining with certain value. 4 different water level, different elastic modulus of surrounding rock, and the development of lining crack when the elastic modulus of surrounding rock is different. Changes in stress and displacement.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TV732.51

【參考文獻】

相關期刊論文 前1條

1 景林海,夏祖諷,洪善桃;混凝土的本構關系及其應用[J];結構工程師;2004年06期

，

本文編號：1789245