本文選題：預(yù)應(yīng)力鋼筒混凝土管(PCCP) + 預(yù)應(yīng)力分布�。� 參考：《南京航空航天大學(xué)》2014年碩士論文

【摘要】：預(yù)應(yīng)力鋼筒混凝土管(PCCP)作為復(fù)合型管材兼有鋼管和混凝土管的優(yōu)點(diǎn),被越來越多地應(yīng)用于輸水工程中,近年來對于PCCP的研究越來越受到重視。由于PCCP自身結(jié)構(gòu)特點(diǎn)——鋼絲提供初始預(yù)應(yīng)力,其預(yù)應(yīng)力的大小和分布對于PCCP的承載能力和受力性能十分重要,但是當(dāng)前針對纏絲完成時(shí)預(yù)應(yīng)力分布及預(yù)應(yīng)力損失的研究相對較少。本文將結(jié)合實(shí)際PCCP管道工程,利用有限元軟件ANSYS進(jìn)行數(shù)值仿真,對結(jié)構(gòu)進(jìn)行內(nèi)力和位移分析,得到預(yù)應(yīng)力的分布和損失情況,為PCCP試驗(yàn)研究和工程應(yīng)用提供參考數(shù)據(jù)。本文的主要工作如下:(1)通過ANSYS有限元模型進(jìn)行預(yù)應(yīng)力分析,得到管材結(jié)構(gòu)應(yīng)力分布情況;并比較了幾種建模方法:一次性施加降溫值建模與分階段施加降溫值建模,合并鋼絲作用建模與鋼絲精確建模,得到對進(jìn)行PCCP結(jié)構(gòu)分析較優(yōu)的模型,為研究預(yù)應(yīng)力分布和損失提供更加準(zhǔn)確的數(shù)值仿真模型。(2)綜合分析造成PCCP預(yù)應(yīng)力損失的因素,通過施加考慮預(yù)應(yīng)力損失后的預(yù)應(yīng)力值,得到結(jié)構(gòu)相應(yīng)的應(yīng)力變化情況,分析預(yù)應(yīng)力損失對結(jié)構(gòu)承載性能的影響。(3)為較準(zhǔn)確地得到實(shí)際存在的預(yù)應(yīng)力分布情況,本文通過ANSYS仿真,結(jié)合參數(shù)分析,得到鋼絲應(yīng)力與管芯內(nèi)表面環(huán)向應(yīng)力的對應(yīng)關(guān)系公式,為準(zhǔn)確測量預(yù)應(yīng)力大小和分布提供理論基礎(chǔ)。
[Abstract]:Prestressed steel cylinder concrete pipe (PCCP) as a composite pipe has the advantages of both steel pipe and concrete pipe. PCCP has been used more and more in water conveyance engineering. In recent years, more and more attention has been paid to the study of PCCP. The size and distribution of the prestressing force is very important for the bearing capacity and mechanical performance of the PCCP because of its structural characteristics-the steel wire provides the initial prestress, and the size and distribution of the prestressing force are very important to the PCCP. However, there are few researches on the distribution of prestressing force and the loss of prestressing force. Combined with the actual PCCP pipeline engineering, the finite element software ANSYS is used to carry out numerical simulation to analyze the internal force and displacement of the structure, and the distribution and loss of prestressing force are obtained, which provides the reference data for the experimental research and engineering application of PCCP. The main work of this paper is as follows: (1) the stress distribution of pipe structure is obtained by using ANSYS finite element model, and several modeling methods are compared: one time applying cooling value modeling and the other is applying temperature drop value modeling step by step. Combining the action modeling of steel wire with the precise modeling of steel wire, a better model for PCCP structure analysis is obtained, which provides a more accurate numerical simulation model for the study of prestress distribution and loss. By applying the prestress value after considering the prestress loss, the corresponding stress variation of the structure is obtained, and the influence of the prestress loss on the bearing capacity of the structure is analyzed. Through ANSYS simulation and parameter analysis, the corresponding relation formula between steel wire stress and inner surface stress of pipe core is obtained, which provides a theoretical basis for accurately measuring the size and distribution of prestress.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU378

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 彭壽海;超大口徑預(yù)應(yīng)力鋼筒混凝土管(PCCP)結(jié)構(gòu)分析[D];清華大學(xué);2009年

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本文編號：2018286