本文選題：大體積混凝土結(jié)構(gòu) + 溫控仿真　； 參考：《浙江工業(yè)大學(xué)》2014年碩士論文

【摘要】：拱壩施工技術(shù)復(fù)雜,澆筑倉位多,施工難度大,混凝土內(nèi)部產(chǎn)生的水化熱很大,溫度荷載是拱壩的一項(xiàng)主要荷載,溫度變形受地基約束時(shí)會在壩體產(chǎn)生較大的溫度應(yīng)力。當(dāng)溫度拉應(yīng)力超過混凝土的允許抗拉強(qiáng)度時(shí),就可能導(dǎo)致裂縫的出現(xiàn),因此正確把握拱壩溫度場及應(yīng)力場的分布規(guī)律,對制定滿足大壩要求的溫控標(biāo)準(zhǔn),采取相應(yīng)的防裂措施以及正確指導(dǎo)大壩施工有著重要的意義。另外,混凝土拱壩內(nèi)部溫度場的研究,為溫度-應(yīng)力試驗(yàn)提供溫度歷程曲線,為從整體論角度研究拱壩早齡期抗裂性做準(zhǔn)備。因此,拱壩溫度場及應(yīng)力場的仿真計(jì)算是一項(xiàng)重要的研究課題。 本文采用ANSYS軟件創(chuàng)建有限元模型,并采用基于Fortran語言編制的溫控仿真程序進(jìn)行溫度場和應(yīng)力場的仿真計(jì)算,用tecplot軟件進(jìn)行后處理的方法,分析了大崗山雙曲拱壩施工期的溫度場及應(yīng)力場,并對其特點(diǎn)及發(fā)展規(guī)律作了研究,提出了可供大壩工程設(shè)計(jì)與施工參考的意見. 本論文的研究成果,可以方便、快速、準(zhǔn)確地計(jì)算采取表面保溫和跳倉澆筑條件下大壩結(jié)構(gòu)的溫度場和溫度應(yīng)力,為大壩混凝土結(jié)構(gòu)的溫度場和溫度應(yīng)力計(jì)算提供了科學(xué)依據(jù),也為大壩結(jié)構(gòu)溫度控制的進(jìn)一步研究提供理論基礎(chǔ).
[Abstract]:The construction technology of arch dam is complicated, the construction is difficult, the hydration heat generated by concrete is very large, and the temperature load is one of the main loads of arch dam. When the temperature deformation is constrained by the foundation, there will be larger temperature stress in the dam body. When the temperature tensile stress exceeds the allowable tensile strength of concrete, it may lead to the appearance of cracks. Therefore, the distribution law of temperature field and stress field of arch dam is correctly grasped, and the temperature control standard that meets the requirements of dam is formulated. It is of great significance to take corresponding crack prevention measures and to guide dam construction correctly. In addition, the study of internal temperature field of concrete arch dam provides temperature history curve for temperature-stress test, and prepares for the study of early age crack resistance of arch dam from the angle of holism. Therefore, the simulation of temperature field and stress field of arch dam is an important research subject. In this paper, the finite element model is created by ANSYS software, the temperature field and stress field are calculated by temperature control simulation program based on Fortran language, and the method of post processing by tecplot software is used. This paper analyzes the temperature field and stress field of Dagangshan double curvature arch dam during construction, studies its characteristics and development rules, and puts forward some suggestions for the design and construction of the dam. The research results of this paper can conveniently, quickly and accurately calculate the temperature field and the temperature stress of the dam structure under the condition of surface insulation and hopping pouring, which provides a scientific basis for the calculation of the temperature field and the temperature stress of the dam concrete structure. It also provides a theoretical basis for further research on temperature control of dam structure.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV642.4

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