本文選題：面板堆石壩 + 非線性有限元��； 參考：《西北農(nóng)林科技大學(xué)》2014年碩士論文

【摘要】：混凝土面板堆石壩由于其具有較高的安全性、較好的經(jīng)濟(jì)性和較廣的適應(yīng)性，成為發(fā)展最為迅速一種壩型。開(kāi)展混凝土面板堆石壩應(yīng)力應(yīng)變分析和面板分縫影響研究對(duì)該壩型的設(shè)計(jì)理論的發(fā)展和解決工程實(shí)際問(wèn)題都有著重要意義。本文主要研究的內(nèi)容及所得的結(jié)論如下： 1、本文介紹了面板堆石壩的發(fā)展歷程、國(guó)內(nèi)外研究現(xiàn)狀。研究了混凝土面板堆石壩有限元仿真分析中的非線性基本理論、方法及堆石體的各種本構(gòu)模型；同時(shí)闡述了面板與墊層之間的接觸設(shè)置理論和面板分縫的薄層單元理論。 2、本文首先利用ANSYS軟件進(jìn)行材料本構(gòu)E-B模型的二次開(kāi)發(fā)，使之能應(yīng)用于混凝土面板堆石壩的計(jì)算模擬。在軟件中運(yùn)用生死單元、荷載步、荷載子步的聯(lián)合設(shè)置實(shí)現(xiàn)了分級(jí)加載來(lái)模擬堆石壩逐層填筑的施工過(guò)程；采用面—面接觸單元模擬了面板與墊層的接觸。以青海省石頭峽面板堆石壩為例，模擬其標(biāo)準(zhǔn)斷面在竣工期、一期蓄水和正常蓄水期的應(yīng)力變形，并以大量圖表進(jìn)行結(jié)果分析。結(jié)果表明：壩體應(yīng)力變形滿足安全要求，和已建的國(guó)內(nèi)外同類工程的應(yīng)力變形結(jié)果一致。 3、同樣以青海省石頭峽面板堆石壩為例，對(duì)標(biāo)準(zhǔn)斷面進(jìn)行面板水平縫模擬。給出了水平分縫不同寬度、數(shù)量時(shí)的應(yīng)力和撓度及其分布規(guī)律，探討較為理想的分縫數(shù)量，以減小面板的應(yīng)力變形，面板所分的縫體采用薄層單元進(jìn)行模擬。結(jié)果表明：面板水平分縫的設(shè)置壩體的應(yīng)力變形無(wú)影響；在所設(shè)定的不同數(shù)量縫體中，隨著水平縫體數(shù)量越多，最大應(yīng)力值有減小的趨勢(shì)，且在水平縫附近的壓應(yīng)力值有明顯的減小，但只表現(xiàn)在局部區(qū)域，對(duì)拉應(yīng)力值得影響不大；面板的撓度有減小的趨勢(shì)，但影響甚微，可以忽略不計(jì)；在縫體數(shù)量相同的前提下，增大面板水平分縫的寬度，有助于減小面板的壓應(yīng)力，但作用不明顯，對(duì)面板撓度基本無(wú)影響。
[Abstract]:Concrete face rockfill dam has become the most rapidly developing type of dam because of its high safety, better economy and wider adaptability. It is of great significance to develop the stress and strain analysis of concrete face rockfill dams and to study the effect of panel joint on the design theory development of the dam type and the practical engineering problems. The main contents and conclusions of the paper are as follows:
1, this paper introduces the development course of the face rockfill dam and the research status at home and abroad. The nonlinear basic theory of the finite element simulation analysis of concrete face rockfill dam is studied, the method and various constitutive models of the rockfill body are studied. At the same time, the contact setting theory between the panel and the cushion and the thin layer element theory of the panel seam are also expounded.
2, this paper first uses the ANSYS software to develop the material constitutive E-B model, which can be applied to the calculation and Simulation of the concrete face rockfill dam. In the software, the combined setting of life and death units, load steps and load sub steps is used to simulate the construction process of the rockfill dam by layered loading, and the surface to face contact element model is used. The contact between the panel and the cushion is proposed. Taking the stone gorge face rockfill dam in Qinghai Province as an example, the stress and deformation of the standard section in the completion period, the first phase of the water storage and the normal storage period are simulated, and the results are analyzed with a large number of charts. The results show that the stress and deformation of the dam meet the safety requirements and the stress and deformation results of the similar projects at home and abroad. Agreement.
3, taking the stone gorge face rockfill dam in Qinghai as an example, the horizontal joint of the standard section is simulated. The stress and deflection of the horizontal seams and the distribution rules of the stress and deflection in the number of the horizontal seams are given. The more ideal seam number is discussed to reduce the stress and deformation of the panel. The seam body divided by the panel is simulated by the thin layer element. It is shown that the stress and deformation of the dam body is not affected by the horizontal joint of the panel; the maximum stress value decreases as the number of the horizontal seams is more, and the stress value near the horizontal seam decreases obviously, but only in the local area. The degree has a decreasing trend, but the influence is very slight, it can be ignored. Under the same number of seams, the width of the horizontal seam is increased, which can help to reduce the pressure stress of the panel, but the effect is not obvious, and there is no effect on the deflection of the panel.
【學(xué)位授予單位】：西北農(nóng)林科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV641.4

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