本文關(guān)鍵詞： 裝卸工藝 樁土綁定約束 應(yīng)力應(yīng)變 穩(wěn)定性研究 結(jié)構(gòu)數(shù)值模擬　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：架空斜坡碼頭結(jié)構(gòu)數(shù)值模擬研究是基于港口工程規(guī)范規(guī)程、靜力分析和穩(wěn)定性驗(yàn)證等理論，借助于大型通用有限元軟件，對(duì)碼頭結(jié)構(gòu)靜力性能進(jìn)行的分析研究。這是一種既有效又實(shí)惠的結(jié)構(gòu)分析方法，通用于工程技術(shù)等很多領(lǐng)域中。由于三峽庫(kù)區(qū)水位變幅大、岸坡地形和地質(zhì)情況復(fù)雜等特殊的水文地質(zhì)條件，碼頭建設(shè)中水工結(jié)構(gòu)與岸坡的相互作用后結(jié)構(gòu)受力變形等問(wèn)題尤為突出。盡管有限元數(shù)值模擬法還具有本構(gòu)模型參數(shù)的多樣性和不確定性等缺陷，但利用其預(yù)測(cè)趨勢(shì)無(wú)疑是當(dāng)前最為經(jīng)濟(jì)而有效的方法。 本文以重慶巴南區(qū)麻柳鎮(zhèn)LNG船舶加氣碼頭為依托，對(duì)長(zhǎng)江上游庫(kù)區(qū)大水位差LNG架空斜坡碼頭裝卸工藝和總平面布置開(kāi)展了研究；在考慮到樁基-岸坡土體相互作用效應(yīng)和庫(kù)區(qū)高水位工況下，對(duì)架空斜坡道樁柱結(jié)構(gòu)進(jìn)行了應(yīng)力應(yīng)變的分析研究，總結(jié)了架空斜坡碼頭在受力和變形方面的規(guī)律，驗(yàn)證設(shè)計(jì)的合理性，對(duì)受力不利部位提出優(yōu)化結(jié)構(gòu)的措施，從而為以后類似工程結(jié)構(gòu)設(shè)計(jì)提供一定的參考。 通過(guò)對(duì)LNG碼頭裝卸工藝設(shè)計(jì)方案的比選，確定了裝卸工藝和總平面布置方案，為相似工程的設(shè)計(jì)提供參考依據(jù)。借助于有限元數(shù)值模擬軟件，創(chuàng)建各個(gè)組成整體模型的幾何模型部件，并將其裝配。采用架空斜坡碼頭樁基和岸坡接觸表面綁定約束，建立碼頭樁基與岸坡土體整體模型�？茖W(xué)選取合乎工程實(shí)際的各類參數(shù)屬性和模型本構(gòu)關(guān)系，合理劃分整體模型網(wǎng)格，有效加密局部接觸部位網(wǎng)格�？紤]碼頭高水位工況下，對(duì)整體模型施加碼頭上部LNG管道、人群產(chǎn)生的均布荷載和庫(kù)區(qū)高水位水流力等作用，對(duì)LNG架空斜坡碼頭樁基與岸坡整體模型進(jìn)行靜力性能分析計(jì)算研究，得出整體模型結(jié)構(gòu)的應(yīng)力應(yīng)變?cè)茍D，分析總結(jié)架空斜坡碼頭在受力和變形方面的機(jī)理和規(guī)律，驗(yàn)證結(jié)構(gòu)設(shè)計(jì)的合理安全性。此外，，對(duì)架空斜坡道受力不利構(gòu)件或薄弱局部部位進(jìn)行單獨(dú)的數(shù)值模擬分析研究，驗(yàn)證其在水流力等作用下的穩(wěn)定性，確保工程設(shè)計(jì)安全可靠。
[Abstract]:The numerical simulation study of elevated sloping wharf structure is based on the theory of port engineering code, static analysis and stability verification, with the aid of large-scale general finite element software. The static performance of wharf structure is analyzed and studied. It is an effective and affordable structural analysis method, which is widely used in many fields, such as engineering technology, etc. Because of the large fluctuation of water level in the three Gorges Reservoir area, Special hydrogeological conditions such as complex landforms and geological conditions on bank slopes, In the construction of wharf, the problems of stress and deformation of the structure after the interaction between hydraulic structure and bank slope are particularly prominent, although the finite element numerical simulation method also has the defects such as the diversity and uncertainty of constitutive model parameters, and so on. But using its forecast trend is undoubtedly the most economical and effective method at present. In this paper, based on the LNG vessel aeration wharf of Maaliu Town in Banan, Chongqing, the handling technology and general plane arrangement of the large water level difference LNG aerial slope wharf in the upper reaches of the Yangtze River are studied. Considering the pile-slope soil interaction effect and the high water level condition in the reservoir area, the stress and strain analysis of the pile column structure with elevated ramp is carried out, and the law of stress and deformation of the elevated slope wharf is summarized. The rationality of the design is verified, and the measures to optimize the structure are put forward for the unfavorable part of the force, which provides a certain reference for the structural design of similar engineering in the future. Through the comparison and selection of the loading and unloading process design scheme of LNG wharf, the loading and unloading process and the general plane layout scheme are determined, which provides a reference basis for the design of similar engineering. With the help of finite element numerical simulation software, The geometric model components that make up the whole model are created and assembled. The contact surface binding constraint between the pile foundation and the bank slope is adopted. The integral model of pile foundation and slope soil of wharf is established. All kinds of parameter attributes and model constitutive relations are scientifically selected according to the engineering practice, and the whole model grid is reasonably divided, and the grid of local contact position is effectively encrypted. Under the condition of high water level of wharf, The static behavior analysis and calculation of the pile foundation and bank slope integral model of LNG elevated slope wharf are carried out by applying the LNG pipeline in the upper part of the wharf, the uniform load generated by the crowd and the high water level flow force in the reservoir area. The stress-strain cloud diagram of the whole model structure is obtained, the mechanism and law of stress and deformation of the elevated slope wharf are analyzed and summarized, and the reasonable safety of the structure design is verified. In order to ensure the safety and reliability of the engineering design, the numerical simulation and analysis of the unfavorable members or the weak parts of the elevated ramp are carried out to verify its stability under the action of the flow force and so on.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U656.1

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相關(guān)期刊論文 前3條

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本文編號(hào)：1500247