本文選題：三峽庫區(qū)　切入點：大水位差碼頭　出處：《重慶交通大學(xué)》2014年碩士論文

【摘要】：三峽成庫蓄水后，庫區(qū)的水文條件發(fā)生了很大變化以及庫區(qū)獨特的地質(zhì)情況，內(nèi)河大水位差架空直立框架碼頭建設(shè)時可考慮利用樁基鋼護筒來實現(xiàn)施工水位下的聯(lián)系構(gòu)件的高效、快速焊接。針對重慶果園碼頭二期工程鋼護筒與鋼筋混凝土聯(lián)合受力結(jié)構(gòu)水工碼頭結(jié)構(gòu)，建立考慮鋼護筒和鋼筋混凝土聯(lián)合受力的數(shù)值模型進行力學(xué)性能分析，然后探討基于鋼護筒的鋼筋混凝土樁大水位差碼頭橫向排架可靠度。研究成果對三峽庫區(qū)的碼頭設(shè)計建設(shè)具有一定的參考價值。本文主要完成了以下研究工作： 首先，利用ANSYS對內(nèi)河大水位差架空直立框架碼頭進行靜力分析，探討了碼頭橫向排架碼頭的力學(xué)傳遞特性以及碼頭的薄弱環(huán)節(jié)。為下面進行可靠度的分析奠定了基礎(chǔ)。 然后，，結(jié)合Monte Carlo法與ANSYS中的概率計算模塊PDS，對內(nèi)河大水位差架空直立框架碼頭的橫向排架各個構(gòu)件進行可靠度分析、靈敏度分析、散點圖分析。分析了橫向排架的各構(gòu)件在不同工況組合作用下的可靠指標。同時通過靈敏度分析探討各個隨機輸入變量對構(gòu)件可靠指標的影響程度。鑒于可靠度分析得到的結(jié)論，碼頭橫向排架的各構(gòu)件的可靠指標均大于規(guī)范要求的3.5且部分構(gòu)件遠遠大于規(guī)范要求的3.5。從而有必要對碼頭結(jié)構(gòu)進行優(yōu)化設(shè)計以達到減少經(jīng)濟投資與資源浪費的目的。 最后，利用ANSYS中的優(yōu)化設(shè)計模塊Opt對碼頭的橫向排架進行優(yōu)化設(shè)計，分析了碼頭各個構(gòu)件在承載能力極限狀態(tài)下的最優(yōu)尺寸，再重新計算構(gòu)件的抗力，并通過ANSYS中的概率模塊PDS重新分析了碼頭各個構(gòu)件的可靠指標。研究得到各個構(gòu)件可靠指標在達到規(guī)范要求的基礎(chǔ)上，較原來的可靠指標均有所下降，部分構(gòu)件接近安全與經(jīng)濟的平衡點，達到了節(jié)約資源與減少投資的目的。
[Abstract]:After the three Gorges reservoir was impounded, the hydrological conditions of the reservoir area have changed greatly and the unique geological conditions of the reservoir area have taken place. In the construction of the vertical frame wharf with large water level difference of inland river, the use of steel retaining tube of pile foundation can be considered to realize the high efficiency of the connecting member under the construction water level. Rapid welding. In view of the structure of hydraulic wharf under combined stress of steel retaining tube and reinforced concrete in Chongqing Orchard Wharf Phase II Project, a numerical model considering the combined force of steel retaining tube and reinforced concrete is established for mechanical performance analysis. Then, the reliability of the reinforced concrete pile with large water level difference wharf is discussed. The research results have some reference value for the design and construction of the wharf in the three Gorges reservoir area. Firstly, the static analysis of the vertical frame wharf with large water level difference in the inner river is carried out by using ANSYS, and the mechanical transfer characteristics and the weak links of the wharf are discussed, which lays a foundation for the reliability analysis below. Then, combining the Monte Carlo method with the probability calculation module in ANSYS, the reliability analysis and sensitivity analysis of each component of the vertical frame wharf with large water level difference in the inner river are carried out. In this paper, the reliability index of each component of the transverse bent frame under different working conditions is analyzed. The influence of each random input variable on the reliability index of the component is discussed through sensitivity analysis. In view of the reliability, the reliability of the component is analyzed. The conclusions of the analysis, The reliability index of each component of the pier is greater than 3.5 of the specification and some of the components are far larger than the 3.5 required by the code. Therefore, it is necessary to optimize the design of the wharf structure to reduce the economic investment and waste of resources. Finally, the optimal design of the transverse bent structure of the wharf is carried out by using the optimization design module Opt in ANSYS, and the optimum dimensions of each member of the wharf under the limit state of bearing capacity are analyzed, and then the resistance of the member is re-calculated. The reliability index of each member of wharf is reanalyzed by the probability module PDS in ANSYS. The reliability index of each component is lower than that of the original reliability index on the basis of meeting the requirements of the specification. Some components are close to the balance point of safety and economy, and achieve the purpose of saving resources and reducing investment.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U656.1

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