本文選題：高樁碼頭 + 極限承載力�。� 參考：《天津大學(xué)》2014年碩士論文

【摘要】：高樁碼頭結(jié)構(gòu)在使用的過(guò)程中，，由于環(huán)境條件、管理運(yùn)營(yíng)不善及結(jié)構(gòu)老化等因素作用，致使結(jié)構(gòu)構(gòu)件破損劣化，難以發(fā)揮其應(yīng)有的功能，結(jié)構(gòu)整體的安全性也因此而受到嚴(yán)重影響。為避免重大安全事故的發(fā)生，掌握碼頭結(jié)構(gòu)所處的安全狀態(tài)，需利用有效的分析方法對(duì)其安全程度進(jìn)行判定。然而目前工程界所使用的分析方法多集中于構(gòu)件層面上，對(duì)結(jié)構(gòu)整體安全度分析方法的研究較少。本文依據(jù)可靠度基本理論，以結(jié)構(gòu)整體極限承載力（結(jié)構(gòu)抗力）和作用荷載（作用效應(yīng)）為隨機(jī)變量，構(gòu)建反映高樁碼頭結(jié)構(gòu)整體安全度的功能函數(shù)，采用JC法計(jì)算結(jié)構(gòu)整體安全度下的可靠指標(biāo)，建立了對(duì)在役高樁碼頭結(jié)構(gòu)進(jìn)行整體安全分析的有效方法。本文的主要研究?jī)?nèi)容如下： （1）以大型通用性有限元軟件ANSYS為平臺(tái)，建立了高樁碼頭結(jié)構(gòu)整體極限承載力分析的非線(xiàn)性三維數(shù)值模型，分別對(duì)堆貨荷載、門(mén)機(jī)荷載以及組合豎向荷載條件下高樁碼頭結(jié)構(gòu)的整體極限承載力進(jìn)行了計(jì)算分析，并對(duì)模型計(jì)算結(jié)果的準(zhǔn)確性進(jìn)行了驗(yàn)證。 （2）應(yīng)用ANSYS軟件的APDL程序語(yǔ)言編寫(xiě)自動(dòng)智能化有限元分析系統(tǒng)程序，將影響結(jié)構(gòu)極限承載力的因素進(jìn)行抽樣并形成求取高樁碼頭結(jié)構(gòu)整體極限承載力的輸入樣本，進(jìn)行有限元計(jì)算得到不同荷載條件、不同組合工況下高樁碼頭結(jié)構(gòu)極限承載力的統(tǒng)計(jì)分析樣本。 （3）利用有關(guān)概率分布檢驗(yàn)方法及樣本統(tǒng)計(jì)分析方法，分別對(duì)不同荷載條件、不同組合工況下高樁碼頭結(jié)構(gòu)整體極限承載力的樣本進(jìn)行了詳細(xì)的統(tǒng)計(jì)分析，確定了高樁碼頭結(jié)構(gòu)極限承載力的概率分布類(lèi)型為正態(tài)分布，并給出了相應(yīng)的統(tǒng)計(jì)參數(shù)。 （4）參照目前結(jié)構(gòu)可靠度的基本理論，以結(jié)構(gòu)整體極限承載力及其對(duì)應(yīng)的作用荷載為隨機(jī)變量，構(gòu)建反映高樁碼頭結(jié)構(gòu)整體安全度的功能函數(shù)，結(jié)合本文得出的結(jié)構(gòu)極限承載力的概率分布與統(tǒng)計(jì)參數(shù)，采用MATLAB編寫(xiě)JC法迭代計(jì)算程序?qū)Y(jié)構(gòu)整體安全度下的可靠指標(biāo)進(jìn)行計(jì)算，建立了高樁碼頭結(jié)構(gòu)整體安全分析的高效近似計(jì)算方法。 （5）根據(jù)天津港某高樁碼頭的工程檢測(cè)資料，建立該碼頭的三維有限元模型。采用本文所述的高樁碼頭結(jié)構(gòu)整體安全分析方法，對(duì)該結(jié)構(gòu)的可靠指標(biāo)進(jìn)行計(jì)算分析，全面展示了本文方法的應(yīng)用流程并驗(yàn)證了該方法的有效性。
[Abstract]:In the process of using high pile wharf structure, due to environmental conditions, poor management and operation, structural aging and other factors, structural members are damaged and degraded, so it is difficult to give full play to its proper function.The overall security of the structure is also seriously affected.In order to avoid the occurrence of major safety accidents and grasp the safety state of wharf structure, it is necessary to use effective analysis method to judge the safety degree of wharf structure.However, most of the analysis methods used in the engineering field are focused on the component level, and the research on the overall safety degree of the structure is less.Based on the basic theory of reliability and taking the ultimate bearing capacity (structural resistance) and action load (action effect) as random variables, a function function reflecting the overall safety degree of high pile wharf structure is constructed.The JC method is used to calculate the reliability index under the overall safety degree of the structure, and an effective method to analyze the overall safety of the existing high pile wharf structure is established.The main contents of this paper are as follows:1) based on the large-scale universal finite element software ANSYS, a nonlinear three-dimensional numerical model for the ultimate bearing capacity analysis of high pile wharf structure is established.The overall ultimate bearing capacity of high pile wharf structure under portal crane load and combined vertical load is calculated and analyzed, and the accuracy of the model calculation results is verified.2) the automatic intelligent finite element analysis system program is compiled by using the APDL program language of ANSYS software. The factors affecting the ultimate bearing capacity of the structure are sampled and the input sample is formed to obtain the overall ultimate bearing capacity of the high pile wharf structure.The statistical analysis samples of ultimate bearing capacity of high pile wharf structure under different load conditions and different combined working conditions are obtained by finite element method.3) using the probabilistic distribution test method and the sample statistical analysis method, the samples of the overall ultimate bearing capacity of the high pile wharf structure under different load conditions and different combination conditions are analyzed in detail.The probability distribution type of ultimate bearing capacity of high pile wharf is determined as normal distribution, and the corresponding statistical parameters are given.With reference to the basic theory of structural reliability at present and taking the ultimate bearing capacity of the structure and its corresponding action load as random variables, a functional function reflecting the overall safety degree of the high pile wharf structure is constructed.Combined with the probability distribution and statistical parameters of the ultimate bearing capacity of the structure obtained in this paper, MATLAB is used to compile the JC iterative calculation program to calculate the reliability index under the overall safety degree of the structure.An efficient approximate calculation method for overall safety analysis of high-pile wharf structure is established.According to the engineering inspection data of a high pile wharf in Tianjin Port, the 3D finite element model of the wharf is established.The reliability index of the high pile wharf structure is calculated and analyzed by using the overall safety analysis method described in this paper. The application flow of this method is fully demonstrated and the validity of the method is verified.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U656.113

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